Written & medically reviewed by Dr. Sanjay Anbu, MBBS· Last reviewed
Prickly heat (heat rash) is a common, itchy, prickly rash in hot, humid weather when sweat gets trapped. It is harmless and settles by keeping cool and dry.
Keep the skin dry; avoid heavy creams that block pores
Stay hydrated
When to see a doctor urgently
Signs of heat exhaustion/heat stroke (dizziness, confusion) — urgent
The rash becoming infected (pus, spreading redness, fever)
A rash that does not settle when cool, or is very widespread
Keep cool and dry. Prickly heat clears when the skin stays cool and dry. In extreme heat, watch for heat exhaustion or heat stroke, which are emergencies. MedDroid gives general information, not a diagnosis.
Frequently asked questions
How do I get rid of prickly heat?
Keep cool and dry — use fans/AC, cool showers, loose cotton clothes, and calamine or prickly-heat powder. It settles once the skin is no longer overheating and sweating.
What causes prickly heat?
Blocked sweat glands in hot, humid weather trap sweat under the skin, causing the itchy, prickly rash. It is common in India’s summers.
When should I worry about a heat rash?
If it becomes infected (pus, spreading redness, fever), does not settle when cool, or you develop dizziness/confusion (possible heat illness).
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.