What should you know about prickly heat sensation?

Heat rash occurs when sweat ducts become blocked and perspiration irritates nearby skin. The sensation may feel like pins and needles, burning, or fine itching, with or without visible small bumps. It often follows heat, humidity, exercise, or tight clothing and can occur on the trunk, neck, or skin folds. Skin Rash, Skin Bumps, and Skin Redness can describe overlapping features, but they do not identify one cause on their own.

Stop the activity, go somewhere cooler, and loosen clothing. Rinse gently with cool or lukewarm water and pat dry. A cool compress can provide short-term relief. Choose airy fabrics, avoid rubbing and fragranced products, and keep damp clothing away from the skin. Do not use thick ointments over a sweaty rash unless a clinician recommends them. If dryness remains after the irritation settles, ask about Emollient Therapy. A clinician can decide whether Topical Corticosteroids have a role when inflammation is prominent.

Seek advice if the prickling lasts despite cooling, interferes with sleep, keeps recurring, or is joined by pain, pus, crusting, fever, or marked swelling. Emergency help is needed for trouble breathing, swelling of the lips or tongue, collapse, or a rapidly severe reaction. A review is also sensible when the skin looks unlike previous heat-related episodes.

What is causing this sensation? Could a product, medicine, or infection be contributing? How should I care for the area during hot weather? Which symptoms require urgent help?