Have you ever gotten up from a chair or out of bed in the morning, and upon taking that first step, feel like your heel has stepped on a tack? Many people experience a feeling of sharp pain which radiates into their arch from their heel and which does not allow them to put their heel on the floor. Sometimes they need to sit back down, stand only on their toes and use the wall for balance. If you can take a few steps, it seems to go away and lessen, allowing you to then resume your activity. Later, throughout your day and after a period of rest, it can happen again. If this sounds familiar you may be suffering from your first attack of heel pain.
Heel pain is a debilitating condition that affects day to day activities. Running and walking both causes stress on the heel because the heel is the part of the foot that hits the ground first. This means that the heel is taking on your entire weight. Diagnosis and treatments for heel pain can be easily found through your podiatrist.
Plantar Fasciitis
One of the main causes of heel pain is a condition known as plantar fasciitis. The plantar fascia is a band of tissue that extends along the bottom of the foot, from the toe to the bottom of the heel. A rip or tear in this ligament can cause inflammation of these tissues, resulting in heel pain. People who do not wear proper fitting shoes are often at risk of developing problems such as plantar fasciitis. Unnecessary stress from ill-fitting shoes, weight change, excessive running, and wearing non-supportive shoes on hard surfaces are all causes of plantar fasciitis.
Achilles Tendonitis
Achilles tendonitis is another cause of heel pain. Similar to plantar fasciitis, inflammation of the Achilles tendon will cause heel pain due to stress fractures and muscle tearing. A lack of flexibility of the ankle and heel is an indicator of Achilles tendonitis. If left untreated, this condition can lead to plantar fasciitis and cause even more pain on your heel.
Heel Spur
A third cause of heel pain is a heel spur. A heel spur occurs when the tissues of the plantar fascia undergo a great deal of stress, leading to a separation of the ligament from the heel bone entirely. This results in a pointed fragment of bone on the ball of the foot, known as a heel spur.
A bunion is an enlargement of the base joint of the toe that connects to the foot, often formed from a bony growth or a patch of swollen tissues. It is caused by the inward shifting of the bones in the big toe, toward the other toes of the foot. This shift can cause a serious amount of pain and discomfort. The area around the big toe can become inflamed, red, and painful.
Bunions are most commonly formed in people who are already genetically predisposed to them or other kinds of bone displacements. Existing bunions can be worsened by wearing improperly fitting shoes. Trying to cram your feet into high heels or running or walking in a way that causes too much stress on the feet can exacerbate bunion development. High heels not only push the big toe inward, but shift one's body weight and center of gravity towards the edge of the feet and toes, expediting bone displacement.
A podiatrist knowledgeable in foot structure and biomechanics will be able to quickly diagnose bunions. Bunions must be distinguished from gout or arthritic conditions, so blood tests may be necessary. The podiatrist may order a radiological exam to provide an image of the bone structure. If the x-ray demonstrates an enlargement of the joint near the base of the toe and a shifting toward the smaller toes, this is indicative of a bunion.
Wearing wider shoes can reduce pressure on the bunion and minimize pain, and high heeled shoes should be eliminated for a period of time. This may be enough to eliminate the pain associated with bunions; however, if pain persists, anti-inflammatory drugs may be prescribed. Severe pain may require an injection of steroids near the bunion. Orthotics for shoes may be prescribed which, by altering the pressure on the foot, can be helpful in reducing pain. These do not correct the problem; but by eliminating the pain, they can provide relief.
For cases that do not respond to these methods of treatment, surgery can be done to reposition the toe. A surgeon may do this by taking out a section of bone or by rearranging the ligaments and tendons in the toe to help keep it properly aligned. It may be necessary even after surgery to wear more comfortable shoes that avoid placing pressure on the toe, as the big toe may move back to its former orientation toward the smaller toes.
Overtraining and overusing the feet are the main causes of common running injuries. A number of these common injuries are caused by overrunning. Runner’s knee is a condition that is characterized by the back of the kneecap beginning to wear away and cause pain in the knee. This frequently occurs due to either a decrease in strength in the quadriceps muscles or ill-fitting shoes that are lacking in proper support for the inside of the forefoot. Strengthening exercises focusing on the quad muscle and sports orthotics are the usual treatments for those suffering from runner’s knee. Prevention of the condition lies in a focus on hip strengthening and quad-strengthening to keep the kneecap aligned. To help learn the best exercise to heal runner’s knee, one can also undergo physical therapy.
One common injury, called iliotibial band syndrome, is often caused by overtraining. This condition occurs when the iliotibial band gets irritated, creating pain and discomfort in the outside knee area. Plantar fasciitis, another common running injury, also occurs as a result of inflammation and irritation. Plantar fasciitis is an inflammation and irritation of the bone in the foot. A large amount of pain is often experienced due to plantar fasciitis. The condition can be caused by a high arch, improper footwear, tight muscles, or flat feet. It can best be avoided by stretching and wearing appropriate footwear that supports the foot.
Another common injury for runners is stress fractures. These injuries occur due to running style, overtraining, or a lack of calcium. Stress fractures most often occur in several locations in runners, including the inner bone of the leg, the thighbone, the bone at the base of the spine and the bones of the toes. Stress fractures are best prevented by wearing proper footwear and by running on flat and hard surfaces; this will absorb some of the shock created during running.
Aside from overtraining, other causes of common running injuries include ill-fitting footwear, a lack of flexibility and strength, and irregular biomechanics. The best way to avoid running injuries is to prevent them from even occurring. Both iliotibial band syndrome and stress fractures are preventable. The first step that should be taken to prevent running injuries is to only wear footwear that fits properly and that is appropriate for whatever activity you are doing. Running shoes are the only protective gear available to runners that can safeguard them from sustaining injuries. Choosing the right pair of shoes is therefore extremely important. While running shoes are an important factor, it is also important to consider other facets of your running routine such as training schedules, flexibility, and strengthening. These elements should be considered and altered according to your running needs to best maximize your run and minimize the possibility of injury. Careful stretching before and after a run should also be considered to help prevent running injuries. Stretching muscles enables greater flexibility and a lesser chance of sustaining injury.
Debilitating foot pain is a problem for many people. But just as stretching the torso can help alleviate back pain, stretching the feet can also help mend existing foot problems and prevent future ones.
The feet, as the body’s foundation, carry the body’s entire weight and can get easily strained from overexertion. Persistent sharp pain and cramping in the feet are often common concerns. Foot pain and foot problems can be due to any number of causes, and in many cases pain may be eased without medication or doctor visits. It is always a good idea, however, to first rule out any serious medical issues with a physician.
Stretching can help relax the feet and alleviate pain, but is especially important before heavy aerobic exercise. Stretching before such activities can help you avoid experiencing painful cramps or strained foot muscles. Stretches should be performed slowly and deliberately without forceful pulling. The stretch should be held for several seconds before relaxing.
A great way to stretch out and loosen up the foot muscles while sitting is to cross one leg over the other and pull the toes carefully back without overextending. Start by resting the left ankle on the right knee. With the left hand, gently flex the left foot by pulling back on the toes. Do not pull too hard; just hard enough to feel the stretch in the arch of the foot. Then point the toes of the left foot as far as you can. Rotate the motion of pointing with pulling back on the toes. This should relax and stretch the muscles on the bottom and the top of the foot. Doing this stretch ten to twenty times should bring relief. Repeat the whole process for the other foot by resting the right ankle on the left knee.
A stretch that focuses on the often injured Achilles tendon involves standing and facing a wall with your arms out and hands flat against the wall. Step back with one foot, keeping it flat against the floor. Move the other leg forward and lean toward the wall. You should feel a stretch through the back of your leg and your Achilles tendon, but do not push yourself too much. Stop when you feel a stretching sensation, and hold for 30 seconds. Ten repetitions may be done for each foot.
Stretching the feet is important for athletes or those performing aerobic exercise, but it can also help anyone with foot pain caused by poor footwear, plantar fasciitis, or long hours standing and walking. Individuals who tend to their feet by regularly stretching every day should be able to minimize foot pain and prevent new problems from arising.
The plantar fascia is a connective tissue in the heel that stretches across the bottom length of your foot. Plantar fasciitis occurs when the connective tissue becomes inflamed, causing heel pain and discomfort during physical activity. Although the condition is completely treatable, traditional methods can take up to a year to start becoming effective.
Plantar fasciitis is caused by a number of everyday activities, so understanding the condition is important for managing and treating it. One of the most common causes of plantar fasciitis is excessive running, especially with improper fitting or non-supportive shoes. Too much exercise can lead to the plantar fascia being overworked and overstretched, which can cause tears in the tissue. Along with improper fitting shoes, pronation, the rolling of the feet inward, is a common cause of plantar fasciitis. If not treated properly, the plantar fascia becomes overstretched and starts to tear, causing inflammation.
Despite the common causes of plantar fasciitis, there are many different treatment options. For less severe cases, conservative home remedies include taking anti-inflammatory drugs to alleviate pain, applying ice packs to the bottom of your foot and heel, slowly stretching and exercising your feet to re-strengthen the tissue, and using orthotic devices are all ways to help manage your plantar fasciitis.
For more severe cases, shockwave therapy has become a common solution for plantar fasciitis. Shockwave therapy can effectively break up the tissue on the bottom of your foot which facilitates healing and regeneration. This fights the chronic pain caused by plantar fasciitis. Even if this doesn’t work, surgery is always a final option. Surgery on the tissue itself can be done to permanently correct the issue and stop the inflammation and pain in your heels.
No matter what the case may be, consulting your podiatrist is the first and best step to recovery. Even the slightest amount of heel pain could be the first stage of plantar fasciitis. Untreated symptoms can lead to the tearing and overstretching of tissue. Because the tearing of tissue can be compounded if it remains ignored, it can evolve into a severe case. The solution is early detection and early treatment. Talk to your podiatrist about the possibilities of plantar fasciitis if you’re experiencing heel pain.
Although rheumatoid arthritis attacks multiple bones and joints throughout the entire body, ninety percent of people who actually develop this condition usually do so in the foot or ankle area. Those who develop this kind of arthritis in the feet usually develop symptoms around the toes and forefeet first, before anywhere else. Rheumatoid arthritis appears to have a genetic component. If it runs in the family, then you will be more likely to develop it as well.
Rheumatoid arthritis is an autoimmune disorder in which the body’s own immune system attacks the lining of the membranes surrounding the joints. This causes inflammation of the membrane lining, and the gradual destruction of the joint’s cartilage and even bone.
Some of the most common symptoms that are associated with RA include pain and swelling of the feet. Stiffness in the feet is also another common symptom that people experience. Those who have RA in the feet usually feel the pain in the ball or sole of their feet. This can get to be very painful at times. A person's joints can even shift and become deformed after a period of time.
In order to properly diagnose RA in the feet it is usually necessary for a doctor or podiatrist to evaluate the area. Your doctor will also question you about your medical history, occupation, etc., to determine whether anything in your lifestyle may have triggered the condition. There are a number of tests that may be performed to help diagnose RA, such as a rheumatoid factor test. There is, however, no one single test that will tell you for sure if you have RA. There are different X-rays that can be taken as well to determine if a person has RA in their feet.
There is a range of treatment options for rheumatoid arthritis. Treatment of RA is usually a lifelong process that includes a variety of methods of treatment and therapy. Your doctor can prescribe special shoes that should help with arch support as well as heel support. A physical therapist can help those with this condition learn exercises which will keep their joints flexible. Surgery may be needed to correct some of the issues with the feet, such as bunions, and hammertoes. Fusion is usually the most successful surgical option for rheumatoid arthritis. However, people need to keep in mind that there are some risks associated with these surgeries.
Poor blood circulation in the feet and legs is often caused by peripheral artery disease (PAD), which is usually the result of a buildup of plaque in the arteries. Plaque buildup, or atherosclerosis, can be the result of excess calcium and cholesterol in the bloodstream. This restricts how much blood can flow through arteries. Reduced blood flow to a certain area of the body severely limits the amount of oxygen and nutrients that part of the body receives. This leads to degeneration in the muscles and other tissues. Sometimes, poor blood circulation in the feet and legs can be caused by other conditions, such as the damaging or inflammation of blood vessels, known as vasculitis.
The lack of oxygen and nutrients caused by poor blood circulation can restrict muscle growth and development, as well as cause muscle pain and cramps, weakness, and stiffness. Other common symptoms include numbness in the legs and feet, skin discoloration in the affected limbs, slower nail and hair growth, and erectile dysfunction in men. In more severe cases of PAD, pain can be present even when a person isn't exercising, and may range from mildly uncomfortable to completely debilitating.
Poor blood circulation in the feet and legs is more common in those who are overweight or obese, have diabetes, high blood pressure, high cholesterol, who smoke, or who have a family history of PAD or related conditions such as a heart attack, stroke, etc. Diabetes and smoking place a person at greatest risk for developing poor blood circulation, although advanced age, over 50, can also increase risk.
If you are experiencing poor blood circulation in the feet and legs caused by PAD, it is important to make changes to your lifestyle in order to reduce your risk of experiencing a heart attack or stroke caused by this condition. If you smoke, quit completely. This will increase the amount of oxygen in your bloodstream. Exercising and reducing the saturated fats in your diet. Saturated fats come from fatty meats, fried foods, whole milk, etc., can make a difference in improving blood circulation in feet. It is also important to avoid developing influenza and to carefully control your blood sugar if you have diabetes.
Your doctor may recommend combining lifestyle changes with a prescription medication regimen to improve blood circulation. The most commonly-used medications for PAD are called statins and work by blocking the amount of enzymes in your body that produce cholesterol. They are known by the brand names Zocor, Lipitor, Crestor, and others.
Gaining weight can happen suddenly and at any time. Usually you won’t notice the extra weight until your feet start hurting at the end of the day. This happens as your feet begin adjusting to carrying more weight. Foot swelling and pain are two of the biggest side effects of having gained weight.
Many foot-related problems can occur even after just putting on a few pounds. This includes the body ‘compensating’ by changing the way it moves. You may find yourself putting extra weight on the wrong parts of your feet and even leaning forward a bit. Your feet were designed to carry a healthy, normal body weight. Extra weight places undue stress on them.
Being overweight often causes the development of Type-2 diabetes, causing leg and foot pain. Older people who do not attempt to control their condition can even lose sensation and feeling in their legs and feet. This can lead to the development of small sores that can lead to serious infection.
Extra stress placed on the joints, tendons and muscles in the feet as a result of extra body weight may also cause heel spurs, or plantar fasciitis. Plantar fasciitis is an inflammation of the foot tissue, causing stiffness and pain when walking and climbing stairs. This can usually be relieved by foot stretches and custom made orthotic shoe-inserts.
Problems in the feet triggered by obesity can be treated by paying special attention to footwear. Proper support shoes that allow for good circulation, especially in the arch and ankle, are vital. A podiatrist can help you find what sort of shoe is most suitable for your feet. They can also measure you for special orthotics if necessary.
It could also be high time to start losing weight in order to treat and prevent diabetes as well as other life threatening diseases. Some methods include yoga and water aerobics, which benefit your entire body without placing stress on your feet. Don’t risk losing your feet by losing interest in them. Take care of your feet and your body, as they deserve the very best.
There are several systemic diseases, or diseases that affect the whole body, that either display symptoms in the feet or affect the health of the feet. Common systemic diseases that affect the overall health of the feet, and the patient’s ability to walk comfortably, include gout, diabetes mellitus, neurological disorders, and arthritis, among others.
In gout, which is caused by an excessive buildup of uric acid in the body, the most common symptoms of pain, inflammation, and redness occur at the metatarsal/phalangeal joint at the base of the big toe. Any excess levels of uric acid crystallize and are deposited in tendons, joints, and surrounding bone and muscle tissue. Gout is commonly treated with NSAIDs to relieve pain and inflammation and other drugs to lower uric acid levels in the body. Gout most commonly affects those who are overweight, have low protein diets and lead a more sedentary lifestyle.
Diabetes mellitus is an increase in the level of blood sugar in which the body cannot counteract with naturally occurring insulin in the body. The three types of diabetes, Type I, Type II and Gestational Diabetes, are all signs the body is either not producing enough insulin or is not efficiently using the insulin that is produced. Gestational diabetes only affects women who are pregnant and have never, prior to pregnancy, exhibited symptoms of the disease.
There are two main issues that affect the feet that are commonly caused by diabetes. They include diabetic neuropathy and peripheral vascular disease. Diabetic neuropathy can lead to damaged nerves and affect the feet through numbness and loss of sensation. Peripheral vascular disease restricts the flow of blood to the foot and can, in extreme cases, lead to the necessity of amputating the foot. Peripheral issues that are caused by diabetes and can affect the foot include athlete’s foot, nail infections, corns, blisters, bunions, severe dry skin, plantar warts and ingrown toenails. These can all be attributed to the decrease of blood flow to the foot.
Neurological disorders and rheumatoid arthritis can also have severe impact on the health of the feet. Neurological disorders can affect the nerves in the main structure of the foot and cause loss of sensation and possible decreased muscle response. Rheumatoid arthritis can affect the bones and joint structures of the foot, making it impossible to walk normally without serious pain.
All systemic diseases that affect the foot can effectively be treated to minimize joint and muscle damage if they are diagnosed early and treated with medication and lifestyle therapy. Diabetes patients must monitor their blood sugar levels and work with their physician to keep their levels as close to normal as possible. Rheumatoid arthritis patients should work with their physician to ensure the proper medications are being taken to reduce the amount of damage to the joints of the body.
Our feet are important in our everyday lives. The problem is that we tend to neglect them. When this becomes a habit, it can cause significant trouble. Ignoring foot problems can mean pain, limited mobility, and expensive doctor's visits. On the other hand, if feet are cared for and looked after regularly, they will perform without pain or complication.
Routine hygiene is the most basic way to care for the feet. Wash and dry them thoroughly daily. Remember to get between the toes and keep the toenails trimmed and short. If the feet feel dry or there are signs of dryness or cracking, use a moisturizer designed for the feet.
When using moisturizer on the feet, try to avoid applying between the toes. If cream or lotion sits too long, they can cause fungal and bacterial growth. When moisturizer is used between the toes, it can also cause the skin to soften too much.
Shoes are also an important aspect of foot care. When one is picking out shoes, make sure they are the correct size. Shoes need to be snug, but not too tight. On the other hand, if shoes are too loose they can cause foot problems as well. It is highly recommended that shopping for new shoes be done later in the day. The reason for this is that the feet will have settled and swelled to their full size by then. To keep your feet at their most healthy, avoid wearing high heels or flip flops too often. Instead, choose shoes that are good for your feet. Good shoes pad the soles of your feet and support the arches and ankles.
Socks should also be worn daily with closed-toe shoes. They may feel hot during the summer months, but they absorb sweat and moisture off the feet. Without socks, the build-up of sweat in a closed-toe shoe can cause fungal problems and athlete's foot.
The best thing to remember in every day foot care is that shoes do make a difference. If you spend a lot of time on your feet, make sure that your shoes show no signs of wear. Shoes should offer ample support for the arches and the overall foot. Additionally, try to make foot cleaning and maintenance a daily habit. If you keep these things in mind, your feet will stay healthy and safe.
Our feet are important in our everyday lives. The problem is that we tend to neglect them. When this becomes a habit, it can cause significant trouble. Ignoring foot problems can mean pain, limited mobility, and expensive doctor's visits. On the other hand, if feet are cared for and looked after regularly, they will perform without pain or complication.
Routine hygiene is the most basic way to care for the feet. Wash and dry them thoroughly daily. Remember to get between the toes and keep the toenails trimmed and short. If the feet feel dry or there are signs of dryness or cracking, use a moisturizer designed for the feet.
When using moisturizer on the feet, try to avoid applying between the toes. If cream or lotion sits too long, they can cause fungal and bacterial growth. When moisturizer is used between the toes, it can also cause the skin to soften too much.
Shoes are also an important aspect of foot care. When one is picking out shoes, make sure they are the correct size. Shoes need to be snug, but not too tight. On the other hand, if shoes are too loose they can cause foot problems as well. It is highly recommended that shopping for new shoes be done later in the day. The reason for this is that the feet will have settled and swelled to their full size by then. To keep your feet at their most healthy, avoid wearing high heels or flip flops too often. Instead, choose shoes that are good for your feet. Good shoes pad the soles of your feet and support the arches and ankles.
Socks should also be worn daily with closed-toe shoes. They may feel hot during the summer months, but they absorb sweat and moisture off the feet. Without socks, the build-up of sweat in a closed-toe shoe can cause fungal problems and athlete's foot.
The best thing to remember in every day foot care is that shoes do make a difference. If you spend a lot of time on your feet, make sure that your shoes show no signs of wear. Shoes should offer ample support for the arches and the overall foot. Additionally, try to make foot cleaning and maintenance a daily habit. If you keep these things in mind, your feet will stay healthy and safe.
Both running and walking are great exercises, but should a person wear the same shoes for both activities? The answer is no, because there is a difference between the way a person’s feet hit the ground when they are walking and when they are running. Therefore, the shoes for each activity are designed differently. Before you begin any exercise program it is always recommended that you speak with your doctor or podiatrist.
Walking is a low impact exercise that is often recommended by doctors to their patients. While walking is a simple activity, it still requires some degree of preparation. If you think about walking and how your feet strike the ground as you move, you will notice that your heel hits the ground first before your foot continues to roll forward and your next step begins. Because of this rolling motion, walking shoes are designed to be more flexible than running shoes. This flexibility helps the walker push off with each step taken.
Because the heel hits the ground first when you walk, walking shoes are designed to absorb most of the shock. Walking shoes should therefore have a beveled or angled heel. The angle of the heel helps absorb the shock and reduces pressure from the ankles. This is especially important for speed walkers, as their feet will hit the ground twice as often as the normal walker.
When people decide to run as a hobby or for their health, they must first realize that running is a high impact exercise. If not done with the proper equipment, running may cause damage to the feet and legs. Running shoes are designed to be more lightweight and to have thicker soles. The thicker soles act as shock absorbers for the rest of the body. Walking shoes often do not have the proper arch support that running shoes do.
A proper fitting shoe can make or break a runner or a walker. If the shoes are too big, their feet will slide back and forth inside the shoe and cause blisters. Whether you will be running or walking, the right equipment can make all of the difference in the world.
A bunion is an enlargement of the base joint of the toe that connects to the foot, often formed from a bony growth or a patch of swollen tissues. It is caused by the inward shifting of the bones in the big toe, toward the other toes of the foot. This shift can cause a serious amount of pain and discomfort. The area around the big toe can become inflamed, red, and painful.
Bunions are most commonly formed in people who are already genetically predisposed to them or other kinds of bone displacements. Existing bunions can be worsened by wearing improperly fitting shoes. Trying to cram your feet into high heels or running or walking in a way that causes too much stress on the feet can exacerbate bunion development. High heels not only push the big toe inward, but shift one's body weight and center of gravity towards the edge of the feet and toes, expediting bone displacement.
A podiatrist knowledgeable in foot structure and biomechanics will be able to quickly diagnose bunions. Bunions must be distinguished from gout or arthritic conditions, so blood tests may be necessary. The podiatrist may order a radiological exam to provide an image of the bone structure. If the x-ray demonstrates an enlargement of the joint near the base of the toe and a shifting toward the smaller toes, this is indicative of a bunion.
Wearing wider shoes can reduce pressure on the bunion and minimize pain, and high heeled shoes should be eliminated for a period of time. This may be enough to eliminate the pain associated with bunions; however, if pain persists, anti-inflammatory drugs may be prescribed. Severe pain may require an injection of steroids near the bunion. Orthotics for shoes may be prescribed which, by altering the pressure on the foot, can be helpful in reducing pain. These do not correct the problem; but by eliminating the pain, they can provide relief.
For cases that do not respond to these methods of treatment, surgery can be done to reposition the toe. A surgeon may do this by taking out a section of bone or by rearranging the ligaments and tendons in the toe to help keep it properly aligned. It may be necessary even after surgery to wear more comfortable shoes that avoid placing pressure on the toe, as the big toe may move back to its former orientation toward the smaller toes.
Toenail fungus is a frustrating problem that affects many people. It can be persistent and hard to get rid of. As many different types of fungi are present throughout the environment, it is very easy to contract toenail fungus.
The feet are especially susceptible to toenail fungus because shoes and socks create the ideal dark and moist environment that fungal infections thrive in. While fungal infections of the nail plate are quite common, if left untreated they can spread beyond the toenail and into the skin and other parts of the body.
Signs of toenail fungus include a thickened nail that has become yellow or brown in color, a foul smell, and debris beneath the nail. The toe may become painful due to the pressure of a thicker nail or the buildup of debris.
Treatment for toenail fungus is most effective during the early stages of an infection. If there is an accumulation of debris beneath the nail plate, an ingrown nail or a more serious infection can occur. While each treatment varies between patients, your podiatrist may prescribe you oral medications, topical liquids and creams, or laser therapy. To determine the best treatment process for you, be sure to visit your podiatrist at the first signs of toenail fungus.
