The incubation period of scabies is usually about 15 days. Scabies is a contagious skin disease caused by the scabies mite, and it is easy to invade thin and tender parts of the skin such as the fingers, elbow sockets, armpits, umbilicus, and external genitalia, and the skin of the whole body can be involved in immune-impaired and infants. The lesions are symmetrically distributed and appear as papules and papules, and those occurring on the penis, scrotum, glans, etc. appear as scabies nodules, accompanied by intense itching, which is worse at night. The scabies mite is a parasitic worm in the epidermis, and the female worm bores into a tunnel in the cuticle of the skin after fertilization, and lays eggs in it, and gradually hatches into larvae after 3-4 days, and the larvae crawl out of the surface of the skin and hide in the mouth of the hair follicle, and it takes about 15 days from the eggs to the larvae, and thereafter shows the symptoms of scabies. Scabies patients usually pay attention to personal hygiene, once diagnosed should be immediately isolated and boiled to disinfect clothes and bedding, treatment is based on topical drugs, the itching can be supplemented with sedative anti-itch drugs taken internally.