There are many different reasons for white patches on the face. First of all, the white mass is of which kind. If it belongs to white pityriasis, the surrounding is clearer, it is a confined white patch with a certain amount of fine scales on the white patch, and the scales may be covered with villi. White pity is also a common symptom, in addition to white pity there are other causes of white patches, such as psoriasis recovery late, the inflammatory loss of pigment loss can also lead to white patches. There is also a case of vitiligo, vitiligo will also appear white patches on the face, but this white patches around the more clear and porcelain white performance.