Itchy arms and calves, consider the following possibilities: the first case is that the arms and calves belong to the exposed parts, which may cause solar dermatitis, or sunburn, then there are erythema, papules, papules, blisters, and accompanied by itching. In the treatment can be oral levocetirizine hydrochloride capsule, 1 time a day, 1 time a capsule, with compound glycyrrhetinic acid capsule, 3 times a day, 2 times a capsule, and topical dinaide ointment twice a day for treatment. The second case is scabies, mainly caused by scabies infection, in addition to the tiny papules on the arms and legs, can appear small papules and tunnels between the fingers, and around the umbilicus, and large nodules on the vulva and buttocks. This can be treated with topical sulfur lotion, or sulfur ointment. For large nodules hydrocortisone butyrate ointment can be applied twice a day.