Hyperpigmentation

What Causes Dark Patches on Diabetic Feet?

Several distinct processes look similar to the eye. Brown staining above the ankle comes from blood pigment leaking out of overloaded veins, a strong sign of venous disease. Velvety darkening, medically called acanthosis nigricans, reflects insulin resistance. Meanwhile, patches following a healed wound or infection are simply post inflammatory and harmless.

Diabetic dermopathy adds another pattern, producing small brown scaly spots on the shins that are common and benign.

Why Does the Cause Matter?

Because the treatments differ completely. Venous staining calls for compression and vein assessment, since ulcers often follow. Insulin resistance calls for metabolic treatment through our diabetes remission clinic. Post inflammatory pigment needs nothing but time and sun protection.

Consequently, applying a lightening cream without knowing the cause treats the colour while ignoring the disease behind it.

How Is It Assessed?

• Examination of the pattern, distribution and texture
• Vein assessment where staining sits around the ankles
• Blood sugar, HbA1c and insulin resistance markers
• Circulation testing where the skin is also cool or thin

What Treatment Is Available?

Venous pigmentation improves with compression therapy and vein treatment, though established staining often persists. Insulin resistance related darkening genuinely fades as metabolic control improves and weight reduces, which patients find encouraging. Post inflammatory marks lighten gradually with sun protection and moisturising.

What Does Assessment Cost?

Consultation is charged at standard rates, with vein studies and blood tests priced separately when indicated. Given that ankle staining is often the first visible sign of venous disease, early assessment is worthwhile.