The body grows small red spots and itchy, consider the following possibilities: 1, may be drug dermatitis, mainly due to muscle injection, oral, or static point drugs caused by drug dermatitis, the type of drugs include antipyretic analgesic or antibiotics, but also anti-diarrheal drugs. The treatment can be oral levocetirizine hydrochloride capsules, one capsule per night, combined with compound glycopyrrolate capsules three times a day, two capsules at a time. If the rash is relatively dense, you can static point compound glycyrrhizic acid monoammonium S sodium chloride injection 200ml once a day, the application of glucocorticoid injection such as methylprednisolone injection to carry out treatment. 2, may be caused by scabies infection scabies, in the treatment can be applied clomid ointment, or sulfur ointment to carry out treatment, if there are large nodules can be coated with dinaide ointment to carry out treatment.