The appearance of a white patch on the face requires careful observation of the appearance of the white patch to determine how it was formed. If the white patches are not painful or slightly itchy, flat with the skin, smooth surface, no bump or depression when touched by hand consider it to be vitiligo on the face, which may be caused by genetic factors or secondary to some external stimuli, mainly formed after the decrease in the number and volume of pigment cells under the skin, and finally until complete decay, need to go to the local hospital to irradiate the Wood’s lamp for clear diagnosis. The white patches on the face have obvious roughness with hand touch, and the surface has flakes consider to be pityriasis albuginea, some research shows that the rate of intestinal parasite infection is higher in pityriasis albuginea patients, but the relationship between microorganism and parasite and pityriasis albuginea is not clear. White pity rash can fade on its own, generally do not need treatment, but should pay attention to avoid excessive washing. At the same time, topical moisturizing cream can be used to improve the symptoms of dry skin, and oral vitamin B complex can also be taken.