Diabetes can affect blood circulation, nerve function, and the body's ability to heal wounds. As a result, even a small cut, blister, or area of skin damage can develop into a serious problem. Diabetic ulcers are open wounds that commonly occur on the feet and require timely assessment and appropriate care.

Understanding the causes, warning signs, and prevention strategies can help people with diabetes protect their skin and reduce the risk of complications.

What Are Diabetic Ulcers?

Diabetic ulcers are wounds that develop in people with diabetes and may heal slowly or become difficult to treat. They commonly occur on the feet, particularly beneath the toes, around the heels, or at pressure points.

Several factors can contribute to their development. High blood glucose levels over time can damage nerves, reducing the ability to feel pain, heat, or pressure. This condition, called peripheral neuropathy, can allow an injury to go unnoticed.

Diabetes can also contribute to poor circulation, which limits the delivery of oxygen and nutrients needed for healing. When these problems occur together, wounds may become persistent and more vulnerable to infection.

Common Causes and Risk Factors

Foot ulcers can develop from several sources, including:

• Shoes that rub or place excessive pressure on the skin.

• Blisters, cuts, burns, or puncture wounds.

• Calluses and pressure points.

• Foot deformities that change weight distribution.

• Reduced sensation caused by nerve damage.

• Poor circulation and delayed wound healing.

People with a previous foot ulcer, foot amputation, or significant nerve or circulation problems may have a higher risk of developing another ulcer.

Regular foot assessments can help identify risk factors before a wound develops.

Signs and Symptoms to Watch For

A diabetic ulcer may appear as an open sore, crack, blister, or area of damaged skin. Some wounds cause pain, while others may be painless because of reduced sensation.

Possible warning signs include redness, swelling, warmth, drainage, an unpleasant smell, or changes in skin colour. Blackened tissue or a wound that becomes deeper can indicate serious damage.

Infection may cause spreading redness, pus, increasing swelling, fever, or chills. However, people with diabetes do not always develop obvious signs of infection, especially when circulation or immune responses are impaired.

Any new foot wound in someone with diabetes should receive prompt medical assessment. Do not wait for it to become painful.

How Are Diabetic Ulcers Treated?

Treatment depends on the wound's depth, location, circulation, and whether infection is present.

A healthcare professional may clean and assess the wound, remove unhealthy tissue when appropriate, and recommend dressings that support healing. Pressure relief, sometimes called offloading, is often essential because continued pressure can prevent the wound from closing.

If infection is present, treatment may include antibiotics selected by a clinician. Antibiotics are not appropriate for every ulcer and should not be used without medical guidance.

Assessment of blood flow is also important. Some patients need additional investigations or treatment to improve circulation. Managing blood glucose and other health conditions supports overall wound healing.

Severe infections or extensive tissue damage may require hospital treatment or surgery.

Daily Foot Care and Prevention

People with diabetes should inspect their feet daily, including the soles and spaces between the toes. A mirror or assistance from another person can help when areas are difficult to see.

Wash feet gently, dry them carefully, and moisturize dry skin without applying cream between the toes. Wear well-fitting footwear and avoid walking barefoot, particularly outdoors.

Do not cut corns or calluses yourself or use chemical corn-removal products without professional advice. These can damage skin and increase the risk of wounds.

Routine foot examinations by a healthcare professional are important, especially for people with neuropathy or circulation problems.

When to Seek Urgent Care

Contact a healthcare professional promptly if you notice an open wound, swelling, drainage, colour changes, or signs of infection.

A rapidly worsening wound, spreading redness, fever, black tissue, or severe illness requires urgent assessment. A new foot ulcer can become serious even when pain is minimal.

Protect Your Long-Term Foot Health

Diabetic ulcers are potentially preventable complications when risk factors are identified and foot care is consistent. Daily inspection, appropriate footwear, good diabetes management, and early treatment of injuries can make a meaningful difference.

If you have diabetes, never ignore a new foot wound. Early professional care offers the best opportunity to address problems before they become more serious.