There are several reasons for a piece of white on the face. 1. If it appears in infancy and soon after birth, the color is not particularly white, but slightly whiter than other normal parts of the skin, consider it to be an anemic nevus or a non-pigmented nevus. If it occurs on the face of a preschooler aged 7-8, it is considered a pityriasis albuginea. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. When there is a piece of white on the face, it is recommended to go to the dermatology department to do skin CT to further clarify the diagnosis.