Intertrigo on brown skin: what to know

Warmth, sweat, and skin-on-skin friction can inflame a fold. Brown skin may show this as deeper brown, red-brown, violet, or grey colouring, sometimes with a shiny or thickened surface. Itch, soreness, burning, peeling, cracks, or moisture can be more informative than colour alone. Once irritation improves, temporary darkening can remain because inflammation can alter pigment activity.

Similar changes occur with eczema, contact reactions, psoriasis, or infection. See [Intertrigo](/conditions/intertrigo/) and [Skin Yeast Infection](/conditions/cutaneous-candidiasis/) for related explanations.

Use a gentle wash, rinse well, and pat the fold dry. Keep sweaty clothing away from the area and select loose, breathable fabrics. Do not scratch, scrub, or use strong acids, bleach, or steroid combinations without advice. A pharmacist or clinician can advise whether [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/) is suitable when yeast is suspected. If sweat is the repeated trigger, ask about [Prescription Antiperspirant](/treatments/medical-dermatology/prescription-antiperspirant/) after the skin has been assessed.

Get medical advice for a brown patch that is new and persistent, painful, rapidly spreading, cracked, wet, bleeding, or associated with odour or discharge. Fever, pus, significant swelling, increasing warmth, or feeling unwell requires prompt care. Recurrent folds should be reviewed so the treatment matches the cause and does not worsen pigment change.

Ask whether the colour represents active inflammation or post-inflammatory change, whether testing is needed, and which products are safe for your skin. Explain any new soap, deodorant, exercise pattern, sweating, or previous treatment.