White spots on the body are mainly divided into the following cases: one is vitiligo, an acquired pigment loss disease, the cause of which is unclear, mainly manifested as porcelain white patches with clear borders on the skin surface, which are easy to spread and have no conscious symptoms; two is anemic nevus, a congenital limited hypopigmented spot with unclear borders; three is anaplastic nevus, a congenital mole with no local melanocytes, the white spot It is a kind of congenital nevus without melanocytes, with no obvious depigmentation and blurred irregular edges; fourth is idiopathic punctate hypopigmentation, which often occurs in the elderly, and is usually a bean-sized white spot, which is slightly depressed than normal skin; fifth is pemphigus, which is a hereditary disease, and usually appears as a sieve-shaped white spot in the fontanelle area after birth.