How long does it take for heat rash to go away in adults?

How long it takes for heat rash (prickly heat) to heal in adults mainly depends on individual physical condition, the severity of the heat rash, and whether appropriate care measures are taken. Generally speaking, if the symptoms are mild, the individual's physical condition is good, and active care measures such as cooling, keeping the skin dry and clean are properly implemented, the heat rash may gradually subside within about 3 days to 1 week. However, if symptoms are severe, the individual's physical condition is poor, or proper care is not provided, the recovery period may extend to 1 or 2 weeks, or even longer. To accelerate healing, it is recommended that adults take timely care measures once heat rash appears—for example, using fans or air conditioning to cool down, wearing loose and breathable cotton clothing, keeping the skin clean and dry, and avoiding scratching. In addition, topical medications such as calamine lotion or talcum powder may be used as directed by a physician to alleviate symptoms and promote recovery. If symptoms persist without improvement or complications such as infection occur, prompt medical attention should be sought.