Foot Health: The Complete Guide

Key numbers at a glance

Why your feet deserve attention

Your feet carry your full body weight thousands of times a day, absorb the impact of every step, and keep you balanced on uneven ground. Most people ignore them until they hurt, and by then a problem that could have been prevented with better shoes or a few minutes of daily care has often become a habit of limping, avoiding walks or giving up activities you enjoy.

Foot problems matter beyond the feet themselves. Painful feet reduce how much you move, and inactivity feeds into weight gain, heart disease, diabetes and low mood. In older adults, foot pain, numbness and poorly fitting footwear are common and underestimated causes of falls and loss of independence. In people with diabetes or poor circulation, a small blister or cut can progress silently to an ulcer, infection and, in the worst cases, amputation.

The good news is that many foot problems are predictable and respond to simple measures: footwear that fits, sensible nail and skin care, gradual increases in activity, and early attention to warning signs. This guide explains how the foot works, the most common problems and what helps, when to see a doctor or podiatrist, and how to protect your feet if you have diabetes, circulation problems or are getting older.

How the foot works

Each foot contains 26 bones, more than 30 joints and a network of muscles, tendons and ligaments. Together they form arches that act like springs: they flatten slightly as weight lands, absorbing shock, then stiffen to give you a firm lever for pushing off. The plantar fascia, a thick band of tissue running from the heel to the base of the toes, supports the arch, and the Achilles tendon connects the powerful calf muscles to the heel bone.

Because the foot is a chain, a problem in one place often shows up somewhere else. Tight calf muscles increase strain on the plantar fascia and can contribute to heel pain. A big toe that has lost movement changes how you push off and can overload the joints next to it. Shoes that squeeze the front of the foot affect the toes, nails and nerves all at once.

Your feet also depend on two systems that are easy to forget: nerves, which tell you when something is rubbing or hurting, and blood vessels, which deliver the oxygen needed to heal. When either fails, as happens with diabetes and peripheral artery disease, the foot loses its warning system and its ability to repair, which is why foot care becomes so much more important in those conditions.

Everyday foot care

Good daily foot care takes a few minutes and prevents a surprising amount of trouble. Wash your feet daily, dry them thoroughly, especially between the toes where trapped moisture encourages fungal infection, and moisturize the tops and soles to stop dry skin from cracking. Do not put lotion between the toes. Change socks daily, and choose materials that wick moisture away if your feet sweat heavily.

Cut toenails straight across, not curved into the corners, and do not cut them too short. Curving the cut encourages the edge of the nail to grow into the skin, which is the main cause of ingrown toenails. Gently smooth sharp edges with an emery board. If your nails are very thick, or if you cannot see or reach your feet comfortably, a podiatrist can trim them safely.

Corns and calluses are the skin's response to pressure or friction, so the lasting answer is to remove the cause, usually a shoe that rubs. Soaking and gently using a pumice stone can reduce thick skin. Avoid cutting corns yourself, and avoid OTC corn removers containing acid if you have diabetes or poor circulation, because they can burn healthy skin and cause ulcers.

• Wash and dry your feet daily, especially between the toes
• Moisturize the tops and soles, but not between the toes
• Cut nails straight across and smooth the edges
• Change socks daily and rotate shoes so they dry out between wears
• Look at your feet regularly, using a mirror for the soles if needed
• Wear flip-flops in locker rooms, pool areas and shared showers

Choosing footwear that fits

Badly fitting shoes cause a large share of common foot problems, from blisters and corns to bunion pain, ingrown nails and nerve irritation. Many adults buy the size they have always bought, but foot size and shape change with age, weight, pregnancy and conditions such as arthritis. Feet also swell through the day and are often slightly different sizes from each other.

Have both feet measured periodically and fit shoes to the larger foot. Shop at the end of the day, when your feet are at their largest, and wear the socks you plan to use with the shoes. Look for about a thumb's width of space between your longest toe and the end of the shoe, enough depth and width that the toes can move, and a fastening, such as laces or a strap, that holds the heel firmly so the foot does not slide forward.

A good shoe should feel comfortable in the store. The idea that shoes need "breaking in" usually means the shoe is the wrong shape for your foot. Daily high heels push weight onto the front of the foot and squeeze the toes, while completely flat, unsupportive shoes can aggravate heel and arch pain. Most people do best with a moderate heel, a cushioned sole and some arch support. Replace athletic shoes when the midsole feels dead or the tread is worn unevenly.

Slippers and going barefoot

Loose slippers and socks on hard floors are a common cause of trips and falls in older adults. Indoor shoes or slippers with a closed back and a non-slip sole are safer. People with diabetes or reduced sensation should never walk barefoot, indoors or out, because they may not feel a cut, splinter or burn.

Common foot problems and what helps

Most foot problems are common, recognizable and manageable with the right approach. The key is knowing which ones you can manage at home, which ones benefit from professional help, and which symptoms mean something more serious is going on. Many share the same underlying causes, such as footwear that does not fit, a sudden increase in activity or skin that is allowed to stay damp, so fixing those basics often helps more than one problem at once.

For any of the conditions below, see your doctor or a podiatrist if things are not improving with sensible measures over several weeks, if pain is stopping you from walking normally, or if you have diabetes, poor circulation or a weakened immune system, in which case problems should be checked early rather than managed alone.

Heel pain and plantar fasciitis

Pain under the heel that is worst with the first steps of the morning or after sitting is typical of plantar fasciitis, irritation of the plantar fascia where it attaches to the heel. It usually settles, but over months rather than weeks. The most effective measures are daily stretching of the calf and the sole of the foot, especially before getting out of bed, supportive and cushioned footwear, possibly an insert, and gradually loading the foot rather than resting it completely. Complete rest does not speed recovery. If it is not improving, ask about physical therapy. Repeated steroid injections are not a routine answer and should only be considered on expert advice.

Ingrown toenails

An ingrown toenail happens when the edge of the nail grows into the skin, usually of the big toe, causing pain, redness and sometimes infection. Many are caused by cutting nails curved rather than straight across, and tight shoes and injury contribute. While it settles, soak the foot in warm water, keep it clean and wear shoes with room at the toes. Do not dig out the corner of the nail yourself, and ignore the old advice to cut a V in the nail, which does nothing. If it keeps coming back, a podiatrist can remove part of the nail under local anesthetic.

Athlete's foot and fungal nails

Athlete's foot is a fungal infection of the skin, usually between and under the toes, causing itching, peeling and cracking. It spreads through shared floors, towels and shoes. OTC antifungal creams, sprays and powders work well if you keep using them for the full time on the label, even after the skin looks clear. Dry between the toes, rotate shoes and wear sandals in shared showers. Do not use a steroid cream alone on a fungal rash, which can make it worse. Cracked skin can let bacteria in, so untreated athlete's foot matters more if you have diabetes. Fungal nail infections are harder to clear and need a doctor's assessment if you want treatment.

Bunions

A bunion is a bony bump at the base of the big toe, with the toe angled toward the others. It is largely due to inherited foot structure, though narrow shoes make symptoms worse. Bunions tend to progress, and non-surgical measures, such as wide, deep shoes with a soft upper, padding, orthotics, ice and pain relievers, manage the symptoms rather than correcting the shape. Splints and correctors sold to straighten the toe do not change the joint. Surgery is considered for pain that limits what you can do, not for appearance.

Corns, calluses and other common complaints

Corns and calluses come from pressure and friction and usually improve when the source is removed. Pain in the ball of the foot often relates to footwear and high heels. Swelling of both ankles is commonly linked to standing, heat, veins or medicines, while swelling of only one leg needs a prompt check. Gout often first appears as a sudden, very painful, hot and swollen big toe joint and needs medical assessment.

Diabetes and your feet

Diabetes affects the feet in two ways. High blood sugar over time can damage nerves, a condition called peripheral neuropathy, which removes the pain that would normally tell you a shoe is rubbing or you have stepped on something sharp. It can also narrow blood vessels, so less blood reaches the feet and injuries heal slowly. Together, these mean a small blister or cut can go unnoticed, become an ulcer and then become infected, sometimes within days.

This is why foot care is a core part of diabetes care, not an optional extra. The American Diabetes Association recommends a comprehensive foot exam at least once a year, including checks of sensation and circulation, and more often if you already have nerve damage, circulation problems or a history of ulcers. Ask for your feet to be checked at your diabetes visits, and take your shoes and socks off so it actually happens.

Daily self-checks are the most important habit. Look at the tops, soles, heels and between the toes every day, using a mirror or asking someone to help if you cannot see well. Check inside your shoes before putting them on. Never use heating pads, hot water bottles or very hot water to warm your feet, because numb skin can burn without you noticing. Keeping blood sugar, blood pressure and cholesterol in your target ranges and not smoking all protect the nerves and blood vessels.

• Check your feet every day for cuts, blisters, redness, swelling or color changes
• Never walk barefoot, indoors or out
• Check inside shoes before wearing them
• Avoid OTC corn and wart removers, which can cause ulcers
• Contact your doctor the same day about any break in the skin, blister or new sore
• Ask whether you qualify for therapeutic shoes or inserts through Medicare or your plan

Circulation and the feet

Peripheral artery disease (PAD) is a narrowing of the arteries that supply the legs, caused by the same fatty buildup that affects the heart. Its classic symptom is claudication: cramping or aching in the calf, thigh or buttock that comes on with walking and eases with a few minutes' rest. Many people with PAD have no symptoms, and others put leg pain down to age. Other signs include cold feet, shiny or hairless skin on the legs, weak pulses in the feet and wounds that heal slowly.

PAD matters because it signals artery disease elsewhere, including in the heart and brain, so people with PAD have a higher risk of heart attack and stroke. The main risk factors are smoking, diabetes, high blood pressure and high cholesterol, and smoking is the single largest. A simple test called the ankle-brachial index compares blood pressure at the ankle with blood pressure in the arm; a result of 0.90 or lower suggests PAD.

Treatment focuses on protecting the heart and legs: stopping smoking, controlling blood pressure, cholesterol and blood sugar, and walking. Supervised exercise therapy, in which you walk to the point of moderate discomfort, rest and repeat, is one of the most effective treatments for claudication, and Medicare covers up to 36 sessions over 12 weeks for people with symptoms. Some people also need medicines or procedures to open the arteries.

Activity, exercise and injury prevention

Regular physical activity is good for your feet as well as the rest of you, and US guidelines recommend at least 150 minutes of moderate-intensity activity a week for adults, plus muscle-strengthening activity on at least 2 days. Walking is one of the easiest ways to get there. The foot problems that come with exercise are mostly overuse injuries, caused by increasing distance, speed or hills faster than bone, tendon and the plantar fascia can adapt.

Fitness improves within weeks, but tendons and bones take months to adapt to a new load. That mismatch is why people often get injured a few weeks into a new running or walking program, just as they start to feel fitter. Increase activity gradually, change one thing at a time rather than adding distance, speed and hills in the same week, and build in rest days, especially at the start.

Watch for pain that is localized to one small point on a bone, makes you limp or is still there the next morning. Pinpoint bone tenderness can be a sign of a stress fracture, which gets worse if you keep running on it. Calf and foot strengthening exercises can help, and shoes should feel comfortable, but there is little evidence that any particular shoe type prevents injury. Comfort is a reasonable guide.

Achilles tendon problems

Pain and stiffness in the Achilles tendon, especially first thing in the morning, often responds to a gradual strengthening program, ideally guided by a physical therapist. A sudden sharp pain at the back of the ankle, often with a snap or a feeling of being kicked, can be an Achilles rupture and needs same-day assessment at urgent care or the emergency room.

Feet in later life, pregnancy and childhood

With age, the fat pads that cushion the heel and ball of the foot thin out, skin becomes drier, nails often thicken and become harder to cut, and sensation and circulation may decline. At the same time, reaching your feet can become harder because of back or hip stiffness, arthritis or eyesight. These changes add up to foot pain, poor nail and skin care and a higher risk of falls.

Foot problems are an underestimated cause of reduced mobility and falls in older adults. Painful feet change how you walk, numbness reduces the information your brain gets about balance, and loose slippers or worn shoes make trips more likely. Asking for help with foot care is practical, not a sign of weakness. A podiatrist can trim thick nails, manage corns and advise on footwear and insoles.

Medicare Part B covers foot care for some medical conditions, such as nerve damage from diabetes, and the treatment of injuries and diseases of the foot, but it generally does not cover routine foot care such as nail trimming or callus removal. Check with your plan before an appointment. Tell your doctor about foot pain, numbness or any fall at your yearly checkup or Medicare Annual Wellness Visit.

Arthritis in the feet

Osteoarthritis commonly affects the joint at the base of the big toe and the midfoot, causing stiffness and pain when pushing off. Rheumatoid arthritis often starts in the small joints of the feet and hands, with swelling and morning stiffness on both sides. Shoes with a stiff or rocker-shaped sole, roomy toe boxes and cushioned insoles can reduce pain, and staying active within comfortable limits helps joints more than rest. Tell your doctor about joints that are swollen, warm or stiff for more than a short time each morning.

Pregnancy

Pregnancy hormones loosen ligaments, and the extra weight and fluid can flatten the arches and swell the feet and ankles, so many people find their shoe size changes, sometimes permanently. Supportive, adjustable shoes, putting your feet up and staying active help with mild swelling of both ankles. Sudden swelling of the face, hands or feet, especially with headache or vision changes, can be a sign of preeclampsia and needs a same-day call to your obstetric provider; swelling in one leg with pain needs same-day care.

Children's feet

Babies and toddlers usually look flat-footed because of a fat pad under the arch, and the arch develops gradually through childhood. Young children learning to walk do well barefoot on safe surfaces, and later need shoes that fit with room to grow, checked often because feet grow quickly. Ask your pediatrician about a limp, persistent pain, stiffness, a foot that turns in or out on one side only, or toe walking that continues past the early walking stage.

Seeing a professional and what it costs

For most foot problems, your primary care doctor is a good first stop. They can examine your feet, check sensation and pulses, look for conditions such as diabetes, gout or arthritis that show up in the feet, and refer you on if needed. Podiatrists are doctors of podiatric medicine (DPM) who are trained to diagnose and treat conditions of the foot and ankle, from nail and skin problems to orthotics and surgery. Physical therapists help with heel pain, Achilles problems, ankle sprains and rehabilitation after injury or surgery.

Coverage varies by plan. Many private plans and Medicare cover medically necessary visits to a podiatrist, but routine care may not be covered, and some plans need a referral from your primary care doctor. For people with diabetes and certain foot conditions, Medicare Part B covers therapeutic shoes or inserts: one pair of custom-molded shoes or depth shoes per calendar year, with inserts, when a doctor certifies the need.

Before your appointment, write down when the problem started, what makes it better or worse, what you have tried and what shoes you wear most. Bring those shoes with you. If you have diabetes, bring your recent blood sugar readings or A1C result and your medicine list.

Myths and facts about foot health

Plenty of foot advice gets passed down without much basis, and some of it delays useful treatment or leads people to spend money on products that do not work. Knowing which ideas to drop helps you focus on the measures that make a difference.

The common thread is that most foot problems respond to fit, gradual change and early attention, rather than to rest alone, gadgets or waiting for pain to go away on its own. If a product promises to cure or correct a foot problem quickly, ask your doctor or podiatrist whether there is evidence behind it before you spend money on it.

• Myth: shoes need breaking in. Fact: a shoe that fits should feel comfortable from the start.
• Myth: resting is the best treatment for heel pain. Fact: stretching and gradual loading help more than complete rest.
• Myth: cutting a V in a nail stops it growing in. Fact: it does nothing; cutting straight across helps.
• Myth: toe correctors straighten bunions. Fact: they do not change the joint, though padding may ease pain.
• Myth: leg pain on walking is just age. Fact: it can be PAD, which signals a higher risk of heart attack and stroke.
• Myth: an expensive running shoe prevents injury. Fact: gradual training matters more; comfort is the best guide.
• Myth: foot numbness in diabetes is harmless because it does not hurt. Fact: it removes your warning system and raises ulcer risk.

A four-week plan for healthier feet

Small, steady changes are the most reliable way to improve foot health. This plan suits most adults; if you have diabetes or circulation problems, start with the daily check in week 1 and keep it going for life. If you have a current foot problem, such as heel pain or an ingrown nail, follow the advice for that condition alongside the plan, and do not push through pain that makes you limp.

Each step builds on the last. By the end of the month you should have a daily routine, shoes that fit, an activity habit that your feet can keep up with, and a plan for any problem that needs a professional. After that, repeat the footwear check every few months, replace worn shoes, and keep up the stretches if heel or calf tightness was a problem.

• Week 1: start a daily foot check and a wash, dry and moisturize routine; cut nails straight across
• Week 2: have both feet measured at the end of the day, check your everyday shoes for fit and wear, and replace slippers with a closed-back, non-slip pair
• Week 3: add daily calf and plantar fascia stretches and a short walk, increasing time gradually
• Week 4: book a visit with your doctor or a podiatrist for any problem that has not improved, and, if you have diabetes, make sure your yearly comprehensive foot exam is scheduled

Every guide in this topic

• What the Guidance Really Says About Feet and Diabetes
• Plantar Heel Pain: Sorting the Evidence From the Noise
• Ingrown Toenails: What Published Guidance Supports
• What the Guidance Really Says About Athlete's Foot
• The Evidence on Choosing Footwear, Without the Hype
• Bunions: What the Evidence Actually Says
• What the Guidance Really Says About Circulation and the Feet
• Foot Care in Later Life: What the Evidence Actually Says
• Swollen Ankles: What Published Guidance Supports
• Feet and Exercise: What the Evidence Actually Says

Frequently asked questions

When should I see a podiatrist instead of my regular doctor?

Your primary care doctor is a good first stop for most foot pain, especially if you are not sure what is wrong or have other symptoms. A podiatrist is helpful for recurring ingrown toenails, thick nails you cannot cut, corns and calluses, orthotics, bunions and diabetes-related foot care. Check whether your plan needs a referral, and whether the visit counts as routine or medically necessary care.

Why does my heel hurt most in the morning?

Pain under the heel that is worst with your first steps after getting up or after sitting is typical of plantar fasciitis. The tissue tightens while you rest and is stretched suddenly when you stand. Stretching your calf and the sole of your foot before getting out of bed, wearing supportive shoes, and gradually staying active usually help. Expect improvement over months rather than weeks.

How should I cut my toenails?

Cut them straight across, leaving them level with the end of the toe, and smooth any sharp edges with an emery board. Avoid cutting into the corners or curving the edge, which encourages ingrown toenails. Cutting after a bath, when nails are softer, makes it easier. If you have diabetes, poor circulation or very thick nails, or cannot reach your feet, ask a podiatrist to help.

What foot problems should a person with diabetes never ignore?

Any break in the skin, blister, sore, ulcer, color change, swelling, unusual warmth or new numbness needs a call to your doctor the same day. Infection can progress within days when sensation and circulation are reduced. Go to the emergency room for a black area, spreading redness, fever or a wound with discharge, and call 911 for fever with confusion.

Are flat feet a problem?

Many people with flat feet have no symptoms and need no treatment. Flat feet only need attention if they cause pain in the feet, ankles or legs, or if an arch that was normal has started to flatten on one side, which can point to a tendon problem. Supportive shoes and inserts help many people with symptoms, and a doctor or podiatrist can assess one-sided changes.

Why are my ankles swollen?

Swelling of both ankles is often linked to long periods of standing or sitting, hot weather, vein problems or medicines such as some blood pressure drugs and NSAIDs. Swelling in only one leg, especially with pain, warmth or redness, can be a blood clot and needs same-day care. Swelling with breathlessness can signal a heart problem; call 911 if you also have chest pain.

Do I need orthotics?

Not everyone with foot pain needs them. OTC arch supports and cushioned insoles help many people with heel pain or tired feet and are a reasonable first step. Custom orthotics may help some people with specific foot shapes, arthritis or diabetes-related pressure problems. A podiatrist or physical therapist can tell you whether they are likely to help you.

How can I get rid of athlete's foot for good?

Use an OTC antifungal for the full time on the label, even after the skin looks clear, since stopping early is the most common reason it comes back. Dry thoroughly between your toes, change socks daily, rotate shoes so they dry out, and wear sandals in shared showers. If it keeps returning, spreads to the nails or the skin becomes red, hot and swollen, see your doctor.

Is calf pain when I walk a sign of something serious?

Cramping in the calf, thigh or buttock that comes on with walking and eases with rest can be a sign of peripheral artery disease, which also signals a higher risk of heart attack and stroke. Mention it to your doctor, who can do a simple ankle-brachial index test. Call 911 for a leg or foot that suddenly becomes cold, pale, numb or very painful.

Does Medicare pay for foot care?

Medicare Part B covers the treatment of foot injuries and diseases, foot exams and care for people with diabetes-related nerve damage, and therapeutic shoes or inserts for eligible people with diabetes. It generally does not cover routine care such as nail trimming or removal of corns and calluses, except in certain medical situations. Medicare Advantage plans may offer more, so check your plan.

When to speak to a doctor

See your doctor or a podiatrist for foot pain that lasts more than a few weeks or stops you walking normally, numbness or tingling, a change in foot shape, recurring ingrown toenails, or pain localized to one point on a bone. If you have diabetes, poor circulation or a weakened immune system, contact your doctor the same day for any break in the skin, blister, sore, color change, swelling or warmth. Seek same-day care for spreading redness, pus or fever, swelling in one leg with pain or warmth, a hot and swollen joint, or a sudden snap at the back of the ankle. Go to the emergency room for a black area on the foot or a wound with discharge in diabetes. Call 911 for a foot or leg that is suddenly cold, pale, blue, numb or very painful, for leg swelling with breathlessness, chest pain or coughing up blood, or for fever with confusion.

Where this comes from

• American Diabetes Association — Foot Complications
• National Institute of Diabetes and Digestive and Kidney Diseases — Diabetes & Foot Problems
• American Podiatric Medical Association — Heel Pain
• American College of Obstetricians and Gynecologists — Preeclampsia and High Blood Pressure During Pregnancy
• American Academy of Dermatology — Athlete's foot
• National Heart, Lung, and Blood Institute — Peripheral Artery Disease
• American Heart Association — Peripheral Artery Disease (PAD)
• National Institute on Aging — Foot Care for Older Adults
• Medicare.gov — Foot care
• Office of Disease Prevention and Health Promotion — Physical Activity Guidelines for Americans, 2nd edition

How this page was put together

Every figure, recommendation and warning above is taken from the guidance named in Where this comes from. Nothing on this page is inferred, summarized or generalized beyond what those bodies publish: where they give a number, it is their number, and where they are silent, so are we. Pages are rebuilt whenever the underlying record changes. Sign-off by a named clinician, where it has happened, is shown at the top of the page along with the date.

Medical disclaimer

This article is general information, not medical advice. It cannot account for your own history, medication or circumstances. Always speak to your doctor, pharmacist or another qualified health professional before making changes that affect your treatment, and never delay seeking medical advice because of something you have read here. In an emergency, call 911.