Heat rash in a teenager

Sports, outdoor activities, warm classrooms, helmets, pads, and tight synthetic clothing can leave sweat against the skin. The rash may be made of tiny red or clear bumps with stinging or itch, especially on the neck, upper chest, back, waist, or areas where clothing presses. Acne, folliculitis, eczema, and other skin rashes can look similar, so a different pattern or unusual symptoms deserve assessment.

After exercise, change out of damp clothes, rinse with lukewarm water, and gently pat dry. Choose loose breathable layers, wash sweaty sportswear regularly, and take breaks in a cool space. Avoid fragranced sprays, heavy ointments, and picking at the bumps. A light moisturiser may help if the skin feels dry; Emollient Therapy explains barrier-supporting care. If itch and inflammation interfere with sleep or activity, ask a clinician whether Topical Corticosteroids are appropriate for the site and age.

Tell a parent, guardian, school nurse, or clinician if the rash is painful, draining, crusted, rapidly spreading, or repeatedly returning despite cooling and clothing changes. Fever, strong tenderness, swelling, blisters, or feeling faint or unwell needs prompt medical attention. Do not share prescription creams with friends.

Ask whether sport equipment, detergent, deodorant, or skincare could be adding irritation, which cream is safe for the affected area, and how to prevent flares during training. Describe when the bumps appear, where they start, and whether they clear after cooling.