Diabetes can affect many parts of the body, including the nerves and blood vessels in the feet. Over time, poorly controlled blood sugar can reduce sensation, affect blood circulation, delay wound healing, and increase the risk of infection.
This is why even a small cut, blister, or sore on the foot can become serious for someone with diabetes.
Diabetic foot complications can often be prevented with good diabetes control, daily foot care, suitable footwear, and regular medical check-ups. Recognising early warning signs and seeking timely treatment can help prevent ulcers, infections, and more severe complications such as amputation.
Diabetic foot refers to foot complications that can develop in people with diabetes. These complications are usually caused by nerve damage, poor blood circulation, or both.
When the nerves in the feet are damaged, a person may not feel pain from minor injuries such as cuts, blisters, burns, or pressure sores. When blood flow is reduced, wounds may heal more slowly and become infected more easily.
If not treated early, diabetic foot problems can progress to foot ulcers, deep infections, tissue damage, and in severe cases, amputation.
Diabetes occurs when the body does not produce enough insulin or cannot use insulin effectively. This causes blood glucose levels to remain high over time.
Persistently high blood sugar can damage:
Nerves that allow you to feel pain, temperature, and pressure
Blood vessels that supply oxygen and nutrients to the legs and feet
Skin and soft tissues that are needed for wound healing
The immune response that helps the body fight infection
Because of these changes, people with diabetes may develop foot problems without realising it until the condition has worsened.
Diabetic neuropathy is nerve damage caused by prolonged high blood sugar levels.
When diabetic neuropathy affects the feet, symptoms may include:
Numbness
Tingling
Burning pain
Reduced ability to feel heat, cold, or pain
Loss of protective sensation
Loss of sensation is especially concerning because small injuries may go unnoticed. A person may continue walking on a blister, cut, or pressure sore without feeling pain, allowing the wound to worsen and become infected.
Diabetes can also affect blood vessels, reducing blood flow to the legs and feet. Poor circulation makes it harder for wounds to receive the oxygen and nutrients needed for healing.
As a result, cuts, ulcers, or infections may take longer to heal. In some cases, untreated infections may become chronic or spread deeper into the tissues.
Poor circulation may also cause symptoms such as cold feet, leg pain when walking, slow wound healing, or changes in skin colour.
People with diabetes should monitor their feet closely because early symptoms may be mild or painless.
Warning signs of diabetic foot problems include:
Numbness, tingling, or burning pain in the feet
Reduced ability to feel heat, cold, or pain
Cuts, blisters, sores, or bruises that do not heal
Redness, swelling, or warmth
Cracked or dry skin
Skin colour changes
Wounds between the toes
Pus or discharge from a wound
Foul smell from a foot wound
Thickened skin, calluses, or pressure points
Changes in foot shape or walking pattern
Any wound or skin change in a person with diabetes should be taken seriously, especially if it does not improve quickly.
Your doctor will begin by reviewing your medical history, diabetes control, symptoms, and overall health. A physical examination of the feet will then be performed to check the skin, nails, pulses, sensation, wounds, and signs of infection.
Additional tests may be recommended to assess nerve function and blood circulation. These may include:
Monofilament test: This test checks whether the foot can feel light touch and pressure. It is commonly used to detect loss of protective sensation.
Pinprick test: This assesses the ability to feel pain sensations.
Ankle reflex test: This checks nerve function and reflex responses.
Doppler ultrasound: This evaluates blood flow to the legs and feet and may help detect circulation problems.
These tests can help identify nerve damage or reduced blood flow before serious complications develop.
Good blood sugar control and proper foot care are essential for preventing diabetic foot complications.
Check your feet every day for:
Cuts or wounds
Blisters
Redness or swelling
Skin colour changes
Cracks or sores
Problems between the toes
Calluses or pressure areas
Use a mirror or ask someone to help if you have difficulty seeing the soles of your feet.
If you notice any abnormality, seek medical advice promptly.
Always wear appropriate footwear, even indoors. Walking barefoot increases the risk of cuts, splinters, burns, and accidental injuries that may go unnoticed if sensation is reduced.
Wash your feet daily using lukewarm water and mild soap. Dry your feet thoroughly, especially between the toes.
Apply moisturiser to prevent dry or cracked skin, but avoid applying it between the toes because excess moisture in this area may encourage fungal infection.
Trim toenails straight across and avoid cutting them too short or rounding the edges.
Do not attempt to remove calluses, corns, or ingrown toenails yourself, especially if you have reduced sensation or poor circulation. Seek professional medical care instead.
Choose shoes that:
Fit comfortably without being too tight
Have adequate cushioning and support
Provide enough space in the toe area
Do not rub against the skin
Protect the feet from pressure and injury
Custom-made footwear or shoe inserts may be recommended for people with foot deformities, pressure points, previous ulcers, or high-risk diabetic foot changes.
Reduced sensation may make it difficult to detect heat or cold. Avoid using heating pads, hot water bottles, or soaking your feet in hot water without checking the temperature first. Test bath water with your hand or elbow before washing your feet.
Routine foot assessments can help detect problems early, especially if you have numbness, poor circulation, previous ulcers, foot deformities, or long-standing diabetes.
Your doctor can advise how often you should have your feet checked based on your risk level.
Smoking reduces blood circulation and can further impair wound healing. For people with diabetes, smoking may increase the risk of foot ulcers, infections, and vascular complications.
Keeping blood glucose levels within the recommended range is one of the most effective ways to reduce the risk of nerve damage, circulation problems, and diabetic foot complications.
Managing blood pressure, cholesterol, body weight, and diabetes medication as advised by your doctor also supports long-term foot and vascular health.
Many diabetic foot complications can be prevented or reduced through early detection, consistent foot care, and good diabetes management.
Prevention focuses on:
Keeping blood sugar under control
Checking the feet every day
Wearing suitable footwear
Treating minor wounds early
Attending regular foot assessments
Managing blood pressure and cholesterol
Avoiding smoking
Seeking medical care promptly for any foot injury or infection
Small foot problems can become serious when diabetes affects sensation and circulation, so early action is important.
Seek medical attention promptly if you have diabetes and experience any of the following:
Numbness, tingling, burning, or pain in the feet
Reduced ability to feel heat, cold, or pain
Cuts, blisters, sores, or bruises that do not heal
Redness, swelling, or warmth in the foot
Pus or discharge from a wound
Foul-smelling foot infection
Changes in skin colour or appearance
Blackened skin or tissue
Fever with a foot infection
Worsening pain or swelling
Do not wait for pain to appear before seeking help. Some people with diabetic neuropathy may have serious foot wounds without feeling pain.
Diabetic foot complications can often be prevented through good diabetes management, daily foot care, regular medical check-ups, and early treatment of wounds or infections.
At Prince Court Medical Centre, our multidisciplinary team of endocrinologists, diabetes educators, dietitians, and ophthalmologists provides assessment and care for people with diabetes, including foot screening, wound assessment, vascular evaluation, and personalised treatment planning where needed.
If you have diabetes and notice numbness, tingling, wounds, swelling, infection, or changes in your feet, seek medical advice promptly.
Book an appointment with our diabetes specialists for diabetic foot assessment and personalised care.
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