Children with white patches on the neck may be caused by anemia nevus, white furfur, vitiligo and other diseases. 1. anemic nevus: the occurrence of this disease is related to the congenital development of vascular tissue function is abnormal, indicating that the local blood flow is reduced, preferably in the trunk, face, limbs, etc., the local will appear white spots, so the child’s neck with white patches may be anemic nevus. 2. white chaff rash: the cause of this disease is not clear, may be related to genetic atopic dermatitis, Malassezia infection, vitamin deficiency, dry skin and other factors, often in the face, upper arms, neck, etc., at first will be erythema, to be erythema subsides after the change into a pale color patches, a few scales, so the patient exists in the neck of the situation of the white patches. 3. Vitiligo: The causes of this disease include heredity, autoimmune system disorders, neurochemicals, etc. It can be triggered by excessive anxiety, skin damage, trauma and other factors. The main manifestation is the appearance of white patches on the skin, especially in the folds of the skin, which can be manifested as white patches on the neck. When white patches are found on the neck, you should go to the hospital in time to clarify the specific cause.