Diabetic foot is a serious complication of diabetes mellitus that affects the lower extremities due to neuropathy, vascular disease, and impaired wound healing. If not treated promptly, it can lead to ulcers, infections, and in severe cases, amputation.

Causes and Risk Factors

1. Diabetic Neuropathy (Nerve Damage)

Prolonged high blood glucose levels can damage the nerves in the feet.
This leads to loss of sensation (sensory neuropathy), meaning patients may not notice injuries, wounds, or ulcers.
Muscle weakness (motor neuropathy) may also cause deformities such as hammer toes or claw toes.

2. Diabetic Angiopathy (Poor Blood Circulation)

Diabetes can cause narrowing and blockage of arteries, reducing blood flow to the feet.
This delays wound healing and increases the risk of infection.

3. Reduced Immune Response

People with diabetes have an increased risk of infections due to a weakened immune system.
Minor wounds can develop into ulcers or even lead to sepsis.

4. Inappropriate Footwear and Trauma

Tight shoes or pressure points (such as calluses) may cause unnoticed injuries.
Dry, cracked skin increases the risk of infection.

Symptoms

Early Stage (Mild Symptoms)

• Numbness or tingling in the feet
• Loss of sensation to pain, temperature, and pressure
• Dry, cracked skin due to reduced sweating

Intermediate Stage (Ulcers and Inflammation)

• Wounds that do not heal or gradually worsen
• Redness, swelling, or discharge from wounds
• Toe deformities and changes in gait

Advanced Stage (Infections and Necrosis)

• Severe pain or complete loss of sensation
• Foul odor from the wound (sign of infection)
• Fever and chills (indicating serious infection)
• Black or purple areas on the skin (necrosis)

Diagnosis

• Clinical examination of the feet for wounds, inflammation, or deformities
• Sensory testing (monofilament test, vibration test) to assess neuropathy
• Doppler ultrasound to evaluate blood circulation
• Wound culture if infection is present

Treatment and Management

1. Wound and Ulcer Care

• Daily cleansing with antiseptics
• Specialized dressings to protect the wound and promote healing
• Offloading the foot (using special footwear or crutches to reduce pressure)
• Topical antibiotics if infection is present

2. Improving Blood Circulation

• Medication (vasodilators or anticoagulants) to enhance blood flow
• Smoking cessation, as it significantly impairs circulation

3. Medical Treatment

• Oral or intravenous antibiotics in cases of infection
• Antidiabetic medication or insulin to control blood glucose levels

4. Orthotic Insoles and Specialized Footwear

• Custom orthotic insoles and anatomical footwear to prevent injuries
• Avoidance of tight or rigid shoes that may cause ulcers

5. Surgical Treatment (Severe Cases)

• Removal of necrotic tissue (surgical debridement)
• Angioplasty or bypass surgery to restore blood flow
• Amputation (only in extreme cases where infection is extensive and life-threatening)

Prevention

✔ Daily foot inspection for wounds, injuries, or skin discoloration
✔ Proper blood sugar control (HbA1c below 7%) to prevent complications
✔ Use of comfortable, well-fitting anatomical footwear
✔ Regular nail trimming without injuring the skin
✔ Moisturizing the feet to prevent dryness and cracks
✔ Avoid walking barefoot to reduce the risk of injury
✔ Regular visits to a podiatrist every 3–6 months for preventive care

When to Consult a Specialist

• If a wound does not heal within a few days
• If there are changes in skin color or temperature
• If swelling, redness, or discharge is present
• If severe pain or loss of sensation occurs

Diabetic foot is a serious but preventable complication of diabetes. With proper glycemic control, good foot hygiene, and regular monitoring, complications can be avoided and the health of the lower limbs can be preserved.