17169 Foot And Toe Ulcers

Overview

A foot or toe ulcer is an open sore on the skin of your foot that is slow to heal. It usually starts as a small break in the skin — a blister, a cut, a cracked patch, or an area rubbed raw by a shoe — and then gets deeper instead of closing over. Ulcers happen most often when two things go wrong together: the nerves in the feet stop sensing pressure or injury (so you don't feel the damage), and the blood supply to the foot is poor (so the skin cannot repair itself quickly). An ulcer is not just a bad graze. It needs proper care, because without treatment the skin can break down further and infection can set in.

Yes, foot ulcers are fairly common, particularly in people with diabetes. Up to about 1 in 4 people with diabetes will develop a foot ulcer at some point in their life. They are also seen in people with poor circulation in the legs, in people with limited mobility, and in older adults whose skin is thinner and more fragile.

Foot and toe ulcers can affect anyone, but they are most often seen in: people with diabetes (especially if their blood sugar has been high for a long time); people with narrowed or blocked arteries in the legs; people whose feet have lost normal sensation (nerve damage); people who sit or lie in one position for long periods; people with bunions, hammer toes or other foot shapes that rub; people who wear shoes that are too tight or rub; smokers; people with kidney disease; and people who have had a foot ulcer before, since these can come back.

Symptoms

Common symptoms

• An open sore or break in the skin, often on the ball of the foot, the heel, the side of the foot, or the top or tip of a toe
• A hard, thick callus with a wound underneath it
• Fluid, clear or cloudy, leaking from the sore
• Redness, swelling or warmth around the area
• Pain, throbbing or tenderness — or no pain at all if feeling in the foot is reduced
• An unpleasant smell from the wound
• Dark or black tissue around the edges of the sore
• Shiny, dry or cracked skin on the foot

Symptoms in children

• Foot ulcers are uncommon in children, but they can happen, so a sore that will not heal still needs checking
• Possible signs include a sore that stays open for more than a week or two, a toe that looks red and swollen, or a child who limps or refuses to put weight on a foot
• Children with diabetes, nerve conditions, circulation problems or unusual foot shapes have a higher chance, and their feet should be checked regularly

Symptoms in older adults

• Ulcers may cause little or no pain because of reduced sensation, so a sore can be well established before it is noticed
• Thinner, drier skin and weaker circulation make healing slower
• Pressure areas on the heel or toes are more likely if you sit or lie in one position for long stretches, or if you are less mobile
• Swollen ankles, brittle toenails and eyesight changes can make it harder to check your own feet, so a family member, carer or foot specialist can help

Causes

Main causes

• Nerve damage (neuropathy): high blood sugar or other conditions damage the nerves in the feet, so you cannot feel pressure, rubbing or small injuries
• Poor blood flow (peripheral arterial disease): narrowed arteries mean less oxygen and fewer nutrients reach the skin, so wounds heal slowly
• Pressure and friction: standing on the same spot, walking on a deformed foot, or wearing shoes that rub creates constant pressure that breaks the skin down
• Minor injury that goes unnoticed: a blister, splinter, stubbed toe, ingrown nail or burn from a hot water bottle
• Dry, cracked skin that lets germs in
• Infection taking hold in a small wound and stopping it from closing

Risk factors

• Diabetes, especially with high blood sugar over many years
• Smoking or vaping, which narrows blood vessels
• High blood pressure, high cholesterol, or kidney disease
• A previous foot ulcer, or a previous amputation
• Foot shape changes such as bunions, hammer toes, claw toes or flat feet
• Hard skin, corns and calluses
• Reduced mobility, or being in bed or a wheelchair for long periods
• Poor eyesight, which makes it hard to check your feet
• Alcohol misuse and some long-term conditions that affect the nerves
• Medicines that lower the body's ability to fight infection, such as steroids or treatments for some immune conditions
• Going barefoot, or wearing tight, pointed or badly fitting shoes
• Older age, and living alone with less help to check your feet

When to see a doctor

See a doctor urgently if:

• You have diabetes and notice any new sore, blister, cut or colour change on your foot — get it looked at without delay
• An existing sore is not smaller after a few days of care, or is getting bigger or deeper
• There is pus, a bad smell, spreading redness, or increasing pain
• You have a fever or feel generally unwell with a foot wound
• Any part of a toe or foot turns black, dark purple or grey
• The foot suddenly becomes cold, pale or very painful

Book a routine appointment if:

• You have hard skin, corns or calluses that you cannot safely manage yourself
• Your shoes rub or you have foot shape changes that make walking uncomfortable
• You have numb feet, pins and needles, or burning in your feet
• You have cramping in your calves when walking that eases with rest
• You want advice on how to check your feet or how to look after them
• You have had a foot ulcer before and want to know how to lower the chance of another

Diagnosis

A doctor or foot specialist (podiatrist) will usually diagnose a foot ulcer by looking at it, asking about your health and how the sore started, and feeling your feet. They will check the pulses in your feet and ankles, look at the skin colour and temperature, and test how well you can feel light touch. They will also check the size, depth and edges of the wound, and look for signs of infection. This is usually quick and painless, though the wound may feel tender.

Tests that may be done

• A wound check with gentle cleaning and measuring of the sore
• A sensation test using a soft nylon strand (a monofilament) or a tuning fork
• Checking pulses by hand, and often a small ultrasound scan of the blood flow in the leg (a Doppler scan)
• An ankle-brachial pressure index (ABPI) test, which compares blood pressure at the ankle with the arm to estimate circulation
• Blood tests to check blood sugar, kidney function, infection markers and general health
• A swab from the wound if infection is suspected, to see which germs are present
• An X-ray, ultrasound or MRI scan if the doctor is concerned that infection has reached the bone
• A referral to a foot clinic, a diabetes foot team, or a blood vessel (vascular) specialist if needed

What to expect at your appointment

You may be seen in a GP surgery, a community foot clinic or a hospital clinic. Your wound may be cleaned and a simple dressing applied. You will usually be given advice about taking pressure off the foot that same day, because this is the most important part of healing. You may be asked to come back for regular checks — often weekly at first — so the healing can be tracked. Bring the shoes you normally wear, since footwear is often part of the problem and part of the solution.

Treatment

Most foot ulcers are treated without an operation. The three main aims are: take pressure off the sore so it can close, keep the wound clean and covered with the right dressing, and treat any infection or circulation problem. Healing usually takes weeks to a few months, and regular follow-up matters. You are a key part of the team — how well you can keep weight off the area and check your feet daily makes a big difference.

Self-care at home

• Take pressure off the sore. This is the most important thing you can do. Your clinician may give you a special boot, shoe, cast or insole, or ask you to stay off the foot as much as possible.
• Follow the dressing plan exactly. Do not add creams, powders or home remedies unless your clinician says it is fine.
• Check your feet every day, including between the toes and the soles. Use a mirror or ask someone to help if you cannot see them.
• Keep the skin moisturised — but not between the toes, where moisture can cause problems.
• Wear shoes and socks that fit well, with no seams rubbing and nothing tight. Check inside shoes with your hand before putting them on.
• Never walk barefoot, even indoors.
• Do not cut corns, calluses or nails yourself, and do not use sharp tools, corn plasters or chemical removers on your feet.
• Do not use hot water bottles, heat pads or sit too close to fires or radiators — numb feet can burn without you noticing.
• Wash your feet daily in warm (not hot) water, dry carefully, and look for any change in colour, swelling or new breaks in the skin.
• Keep any appointments, even if the wound looks better. Ulcers can look improved on the surface while healing is still fragile underneath.

Medical treatments

Treatment is tailored to your wound and your general health. It usually includes: cleaning the wound and removing dead tissue so healthy skin can grow; choosing a dressing that keeps the right level of moisture and protects the area; a device or footwear that spreads pressure away from the sore (called 'offloading'); and treating infection if it is present — your doctor will decide whether antibiotic medicines are needed, and which type. If circulation is poor, your doctor may arrange tests and, if appropriate, refer you to a specialist team who can improve blood flow. Other approaches sometimes used by specialist teams include special wound therapies, suction-assisted dressings, or skin grafts for hard-to-heal wounds. Pain relief and good control of blood sugar, blood pressure and cholesterol are also part of the plan. Always ask your own clinician what applies to you, and never start or stop any medicine without checking with them.

When is surgery considered?

Surgery is not needed for most ulcers, but it may be considered in some situations: if an infection has spread deeply or reached the bone and cannot be cleared with medicines alone; if dead tissue needs to be removed; if a toe or part of the foot has become gangrenous, in which case removal of the dead tissue may be necessary to save the rest of the leg; if blood flow can be improved with a procedure to unblock or bypass a narrowed artery (often done by a vascular specialist); or if a foot shape problem keeps causing ulcers and could be corrected. Your team will explain the benefits and risks of any procedure and will only recommend it after discussing it with you.

Living with this condition

Living with a foot ulcer means building some new habits for a while. Plan your day so you can rest the foot with the pressure taken off, and let family, friends or carers help with errands and chores. Keep a simple daily foot check routine, perhaps at the same time each evening, and write down any changes so you can tell your clinician. Keep shoes by the bed so you never stand on a bare foot. Expect good days and slower days — healing is rarely a straight line, and setbacks do not mean you have failed.

Lifestyle tips

• Stop smoking if you smoke. This is one of the most powerful things you can do for your circulation and healing — ask your clinician for support to quit.
• Keep your blood sugar as steady as you can if you have diabetes; your diabetes team can help you adjust your routine.
• Wear well-fitting, protective footwear at all times, and check the inside of your shoes before putting them on.
• Avoid long periods standing or sitting with your legs down; elevate the foot when resting if your clinician advises it.
• Keep feet clean and dry, and trim nails straight across — or have a foot specialist do it.
• Limit alcohol, which can affect nerves and healing.
• Attend every follow-up appointment, even when things seem fine.

Diet and exercise

Eating well helps your body repair tissue — aim for balanced meals with protein (such as beans, eggs, fish, chicken or lentils), plenty of vegetables and fruit, and enough fluids. If you have diabetes, a dietitian can help you plan meals that keep blood sugar steadier. Exercise is still valuable but needs adapting while the ulcer heals: ask your clinician which movements are safe. Many people can keep active with seated exercises, upper-body work, or walking in a way that keeps weight off the sore (for example using the offloading boot or crutches as advised). Once the ulcer has healed, regular activity that you enjoy — walking, swimming, cycling — helps circulation, strength and mood.

Mental health and emotional wellbeing

A foot ulcer can be frustrating and worrying. It may limit your independence, affect work, and take longer to heal than you would like. It is very common to feel low, anxious or isolated during this time, and those feelings are valid — they are not a sign of weakness. Talk to your clinician if your mood is affected; support is available and it genuinely helps healing to have someone to talk to. If you ever feel hopeless or have thoughts of harming yourself, please contact your local crisis line or your local emergency number straight away.

Prevention

Much of the time, yes. Many foot ulcers can be prevented or caught early, when they are far easier to treat. The most effective steps are: checking your feet every single day, never walking barefoot, wearing shoes that fit properly, getting hard skin and nails managed by a foot specialist rather than yourself, keeping blood sugar, blood pressure and cholesterol in a healthy range, stopping smoking, and attending your regular foot checks. If you have diabetes, an annual foot check is a key part of prevention — it looks at sensation, circulation and skin, and can spot problems before a sore develops.

Vaccines

Keep up with your routine vaccinations as advised by your local health service. If you have diabetes or circulation problems, ask your clinician which vaccinations are recommended for you. A wound that breaks the skin may also raise the question of tetanus protection, so mention it if you are unsure whether your vaccinations are up to date.

Screening programmes

If you have diabetes, you should be offered a foot check at least once a year — sometimes more often if you are at higher risk. This check looks at feeling in your feet, pulses and circulation, skin and nails, and your footwear. Anyone with numbness, poor circulation or a previous ulcer may be offered more frequent checks. People without diabetes who notice numb feet, cramping leg pain when walking, or slow-healing sores should ask their doctor about a foot and circulation assessment.

Complications

If left untreated

• The wound can become infected, spreading into deeper tissue
• Infection can reach the bone, which is harder to treat and may need a long course of treatment or surgery
• Gangrene — where tissue dies because it is not getting enough blood — can develop
• In serious cases, infection can spread through the body (sepsis), which is a medical emergency
• Amputation of a toe, part of the foot, or the lower leg may be needed if tissue cannot be saved
• Longer recovery times, more hospital visits, and reduced mobility
• Ulcers can come back, especially if pressure, footwear or circulation problems are not addressed

Long-term outlook

The outlook is encouraging for most people. Many foot ulcers heal within weeks to a few months with good pressure relief, wound care and treatment of infection, and early treatment greatly improves the chances. Some ulcers take longer and need specialist input, and a small number lead to amputation — but that is not the usual outcome, and teams work hard to avoid it. Looking after your feet daily, keeping appointments, and getting help quickly at the first sign of a new sore are the things that make the biggest difference.

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