Heat rash (prickly heat) is a red or pink rash usually found on body areas covered by clothing. It can develop when the sweat ducts become blocked and swell and often leads to discomfort and itching. Heat rash may be affect in hot, humid climates.
Heat rash looks like dots or tiny pimples. The rash can appear on the head, neck, and shoulders. The rash areas can get irritated by clothing or scratching.
Watch for signs of infection, including:
- Increased pain, swelling, redness, or warmth around the affected area.
- Red streaks extended from the affected area.
- Drainage of pus from the area.
- Swollen lymph nodes in the neck, armpit, or groin.
- Fever of 100°F (37.8°C) or higher, or chills with no other known cause.
Most prickly heat rashes heal on their own. To relieve symptoms, start by removing or loosening your clothing and move yourself to a cool, shady spot. Let the skin air-dry. After the rash is gone, gradually expose yourself to warmer temperatures so that your skin can acclimate.