What should you know about common places for heat rash?

Heat rash, also called prickly heat, develops when sweat ducts become blocked or irritated. It may look like small [Skin Bumps](/symptoms/skin-bumps/), a fine [Skin Rash](/symptoms/skin-rash/), or areas of [Skin Redness](/symptoms/skin-redness/). Neck folds, under the breasts, armpits, groin, waistline, and areas covered by tight or non-breathable clothing are common sites because heat and moisture remain against the skin. Babies may develop it in covered folds, while adults may notice it after exercise, hot weather, or prolonged sweating.

Move to a cooler place, loosen clothing, and let the skin dry. Wear breathable fabrics, rinse away sweat, and use cool compresses rather than heavy occlusive products. Gentle [Emollient Therapy](/treatments/medical-dermatology/emollient-therapy/) may help if surrounding skin is dry, while [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) should be used only when a clinician recommends them for the location and severity. Avoid scratching and fragranced products on irritated skin.

Arrange an assessment if the rash is spreading, very painful, producing pus, or failing to settle after cooling and reducing sweat. Seek urgent care for fever with marked illness, confusion, faintness, or signs of severe overheating. A rash in an unusual location or one that keeps returning may have another cause and deserves examination.

Does the distribution fit heat rash, or could it be infection, eczema, or another rash? Which products are suitable for this fold or body area? How can I prevent recurrence in hot weather or during exercise?