A 4-year-old baby with white patches on his face may be related to herpes simplex, vitiligo, and so on. 1. simple furfura: it occurs in children’s faces, appearing superficial hypopigmented white patches, covered with fine chaff-like scales, may be related to malnutrition, vitamin deficiency, etc.. 2. Vitiligo: may be genetic, autoimmune and other causes of acquired pigment loss skin mucosal diseases, manifested as white skin, the color is porcelain white. 4-year-old baby face white spots can also be seen in other causes, it is recommended that timely medical attention, follow the doctor’s instructions for relevant examinations, in the doctor’s help to clarify the cause, and targeted treatment or treatment.