Some people say it is “worm spot”, some say it is “vitiligo”, what is it? In some cases, even dermatologists need to use some equipment to make a final diagnosis, so what do you need to know as a layman? It is some basic common sense – which diseases will manifest as white spots? How to simply distinguish them? 1, white furfuraceous rash: also called simple furfuraceous rash, “worm spot”. Small patches of vitiligo on the face should be distinguished from white pityriasis. White furfur is mainly hypopigmented round or oval patches, mostly occurring in nutritional imbalance in children, mostly on the face, patches of varying sizes, about 1 cm to several cm in diameter, pale white, unclear borders, no pigmentation of the surrounding skin, the surface has grayish white bran-like scales. 2, lichen planus: damage occurs in the neck, trunk, upper extremities, as a pale white round or oval spots, the border is unclear, the surface is often scaly, the damage is easy to find fungus, most often seen in the heat, easy to sweat young women, after the day cools down, there is a tendency to self-healing. 3.Anemic nevus: mostly occurs after birth, but can also occur later. They are single or multiple round, oval or irregular light-colored spots, but they are more common on the trunk. Due to the lack of local capillaries, the surrounding skin becomes red when rubbing the affected area, but there is no change at the white spot. 4.Albinism: It is a congenital disease with recessive inheritance. There is often a family history. The patient’s hair, eyes, whole body or part of the skin lacks pigment, the iris of both eyes is transparent, the choroidal pigment disappears, and there are often symptoms such as photophobia, lacrimation and nystagmus.