Heat rash on the stomach: what to know

Miliaria, or sweat rash, can affect skin covered by waistbands, tight garments or dressings. The stomach may feel prickly, itchy or tender, with fine bumps and mild redness. A [Skin Rash](/symptoms/skin-rash/) page can help you compare general rash descriptions, while [Skin Bumps](/symptoms/skin-bumps/) and [Skin Redness](/symptoms/skin-redness/) describe common visible features.

A rash on the abdomen is not automatically heat rash. New detergent, adhesive, medication, eczema, infection or an allergic reaction can produce overlapping appearances. Note whether it follows a clothing line, began after sweating, or has scale, blisters or discharge.

Move to a cooler environment, loosen or remove tight clothing and rinse the area with lukewarm water. Pat dry rather than rubbing. Wear light, breathable fabric and change after sweating. A cool damp cloth may reduce itch. Avoid fragranced products, oily layers and scratching while the skin is irritated. If the rash is dry rather than damp, ask a clinician whether [Emollient Therapy](/treatments/medical-dermatology/emollient-therapy/) fits the skin condition.

Seek medical advice if the rash continues despite cooling, keeps returning, becomes painful, forms blisters or affects a large area. Get prompt care for fever, pus, rapidly increasing warmth, swelling, red streaks, facial swelling or breathing trouble. A clinician should assess a rash that began after a new medicine or spreads quickly because those features may signal a cause other than heat irritation.

Does the distribution fit sweat irritation or contact dermatitis? Which soap and clothing should I use? Should I pause a new product? Is [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) appropriate for this area, and how should I use it safely?