When is emollient therapy recommended for heat rash?

Heat rash, also called prickly heat, happens when sweat ducts become blocked and sweat irritates the skin. Heavy or greasy products can hold in heat and moisture, which may make the rash feel worse. Once the skin has been cooled and dried, a light, fragrance-free emollient may soothe dryness or rubbing. A product is less suitable if it makes the area warmer, wetter, or more congested.

Move to a cooler environment, wear loose breathable clothing, and wash gently with lukewarm water before patting the skin dry. Avoid scratching and avoid thick occlusive products over fresh sweat bumps unless advised. If dryness remains, test a small amount of a suitable light emollient on intact skin and stop if irritation increases. Keep folds dry without rubbing them.

Arrange medical advice if the rash is painful, spreading, repeatedly returning, or not settling after cooling measures. Seek prompt help for fever, pus, marked swelling, increasing warmth, or feeling faint or confused in the heat. These features may indicate infection or heat illness rather than uncomplicated heat rash.

Ask whether the rash fits heat rash, whether an emollient is likely to trap moisture in your affected area, which texture to use, and what symptoms should lead to an examination.