The child’s face suddenly white a piece due to simple furfur, pigmentless nevus and vitiligo and other diseases caused. 1. simplex furfur, the disease is mostly due to the child’s allergic body, mainly manifested in the face, neck and other single or multiple white patches, need to pay attention to sunscreen and moisturizing, to prevent too dry and protect the skin. 2. Nevus pigmentosus, most of the congenital appearance of pale white white spots with uneven edges, will not disappear and will not expand, generally do not need special treatment. 3. Vitiligo, this is due to the acquired skin pigmentation caused by the loss of the spots, more than no discomfort, but will be accompanied by other autoimmune diseases. It is recommended to consult the regular hospital, clear cause of the disease in time under the guidance of the doctor symptomatic treatment.