Red spots on the body, very itchy, consider the following possibilities: 1. scabies, mainly due to scabies infection caused by contact with the group of patients suffering from scabies, in the clinical treatment can be oral levocetirizine hydrochloride oral solution. When itching is serious, you can inject chlorpheniramine maleate injection intramuscularly, and you can apply sulfur ointment topically as needed, 2 times/day, in order to kill scabies. Clothing should be disinfected; 2. It may be drug dermatitis, mainly due to allergic reactions caused by oral or sedative cold medicine, antidiarrheal drugs, antipyretic and analgesic drugs, etc. Clinical treatment can be oral Orotadine Hydrochloride tablets and topical application of Furfuryl Glycolate lotion. If the condition is serious it also requires immediate sedation of glucocorticoid drugs such as methylprednisolone sodium succinate injection to enhance the immunosuppressive and anti-inflammatory therapeutic effect.