Heat rash in an arm crease

The inside of the elbow can hold warmth and sweat, especially when the arm stays bent or clothing rubs. Heat rash may cause fine bumps, prickling, itching, or redness in the fold. Eczema, contact irritation, and fungal infection can affect the same site, so a rash that is sharply bordered, scaly, damp, or recurrent deserves a closer look.

Rinse gently and pat the crease completely dry, including after bathing or exercise. Wear sleeves that allow airflow and avoid repeated rubbing. A cool cloth can calm stinging; do not place ice directly on the skin. Avoid fragranced products and thick ointments over moist skin. If inflammation remains troublesome, a clinician can advise whether an emollient or topical corticosteroid fits the diagnosis and location.

Seek medical advice when pain, warmth, swelling, pus, crusting, or a bad smell develops, or when the rash extends beyond the crease. Prompt care is appropriate for fever, rapid worsening, or feeling faint or unwell. An examination is also useful when the rash does not improve after the area is cooled and dried.

Ask whether the crease shows heat rash or another fold rash, which cream is appropriate there, and how to prevent friction during activity.