The cause of the red spots on the body in patches, may be drug dermatitis, scabies, summer dermatitis, as follows: 1, drug dermatitis: may be due to static dots, intramuscular injection, oral, topical Chinese medicine, or antipyretic and analgesic drugs, cold medicine, antidiarrheal drugs, birth control pills and other drugs caused by allergic reactions; 2, scabies: mainly due to contact with the clothing of patients suffering from scabies, or its intimate skin contact The scabies infection is caused by the scabies; 3, summer dermatitis: mainly occurs in the hot summer, due to the stimulation of sweat and ultraviolet radiation caused by an allergic reaction, in the treatment can be anti-allergic treatment, the application of glyburide lotion for external use.