Overview
Prickly heat is a common, itchy rash that appears in hot, humid weather when sweat gets trapped under the skin because the sweat ducts are blocked. It is very common in India's summer and monsoon, especially in babies and in skin folds and areas covered by clothing. It causes tiny red bumps and a prickling, itchy feeling. It is harmless and clears quickly once the skin is kept cool and dry, and it is prevented by loose clothing and staying cool.
Symptoms
- Clusters of tiny red bumps or blisters
- A prickling, stinging or intense itching feeling
- Rash in skin folds and areas covered by clothing
- Common on the neck, chest, back and, in babies, the head
- Worsening with heat and sweating
When to see a doctor
See a doctor if the rash does not clear when kept cool, becomes very sore or infected, or comes with fever.
Causes
Blocked sweat ducts in hot, humid weather, so sweat is trapped under the skin; more common with tight clothing, heat and in babies.