The weather is very hot, and many red spots on the chest without sunburn are itchy. How's it going?

According to what you said, after the hot weather, the chest skin appears red spots and itches, which is probably caused by allergies or prickly heat.

Suggestion:

It is suggested that you pay attention to heatstroke prevention and cooling, do not eat spicy food, fishy shrimp and crab, beef and mutton for the time being, go to the hospital dermatology department in time, and actively use dehumidification and antipruritic ointment or Qingpeng ointment for external use after being diagnosed by a doctor. When the symptoms are serious, take Fangfeng Tongsheng Granule and levocetirizine hydrochloride for oral treatment, and pay attention to avoid excessive scratching and irritation to the affected area in life.