How to fix heat rash

Heat Rash, also called prickly heat, develops when sweat cannot move freely to the skin surface. It can cause small itchy or prickling bumps, redness and a stinging feeling, especially in skin folds, under clothing or after sweating. The appearance can overlap with other Skin Bumps, Skin Rash or Skin Redness, so a changing pattern should not be self-diagnosed from colour alone. Babies, people who are less mobile and anyone in hot, humid conditions may need extra attention to cooling and airflow.

Move to a cooler space, remove damp clothing and rinse with cool or lukewarm water. Pat dry carefully, wear loose breathable fabric and keep folds separated where practical. A cool compress can ease prickling; avoid scratching, oily ointments, fragranced products and thick layers that trap sweat. Keep drinking normally and take breaks from heat or strenuous activity. Do not apply a medicated steroid cream to a child or a large area without professional advice. A clinician may discuss Emollient Therapy or Topical Corticosteroids when another inflammatory rash is present.

Seek prompt medical advice if the rash is rapidly spreading, very painful, hot, swollen, draining pus, or accompanied by fever or marked illness. Arrange a review when cooling does not help, the rash keeps returning, or the diagnosis is uncertain. Breathing difficulty, facial swelling, confusion or collapse requires emergency help rather than home treatment.

Ask whether the pattern fits heat rash or another cause, which products are safe for the affected area, and how to prevent sweat and friction during work, exercise or sleep.