Treating heat rash on the stomach

Heat rash develops when sweat remains against the skin and the sweat ducts become irritated. Waistbands, abdominal folds, exercise and humid weather can make the area warmer and less ventilated. It may look like fine red bumps or a patchy rash and can feel itchy, prickly or sore. Compare its appearance with [Skin Rash](/symptoms/skin-rash/) and [Skin Redness](/symptoms/skin-redness/), but do not assume every abdominal rash is heat-related.

Treatment choices depend on whether the skin is damp, dry, cracked, infected or reacting to a product. A clinician may need to distinguish sweat irritation from eczema, contact dermatitis or infection before recommending a medicated cream.

Cool the room and the skin, rinse gently, then pat the stomach dry. Wear loose breathable clothing, change after sweating and keep abdominal folds dry without scrubbing. Stop fragranced lotions, oils and new products until the cause is clearer. Do not use an antibiotic, antifungal or steroid cream without suitable advice. If dryness remains, [Emollient Therapy](/treatments/medical-dermatology/emollient-therapy/) may be discussed. A clinician can explain whether [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) are appropriate and how to limit irritation.

Arrange an appointment if cooling and clothing changes do not help, if the rash recurs often, or if it spreads, cracks, blisters or becomes painful. Seek prompt care for pus, fever, rapidly worsening redness, marked swelling or red streaks. Breathing difficulty or swelling of the lips and face after a product or medicine requires urgent help. A rash in a skin fold that has a strong odour or oozes also needs assessment.

What is the most likely cause of this stomach rash? Which products should I avoid? Is a moisturiser suitable, and should I use a medicated cream? How long should I try the plan before returning, and which changes would need earlier review?