Red pimples are getting itchy, which is an allergic reaction of the skin to allergens and stimuli. There are several common allergens, the first may be food, the second may be drugs, the third may be infection, the fourth may be physical, and the fifth may be caused by other diseases. It is recommended not to eat irritating food, choose topical antipruritic ointment Ganbaosong cream appropriately, and don't scratch. Thank you for your question. I hope it helps your problem.