White patches on the back of the neck are considered to be related to vitiligo, white chaff, florid chaff, etc. 1. Vitiligo: Vitiligo is related to immune system disorders, genetic factors, neurochemicals and so on. Typical symptoms of patients are white patches of varying sizes on the face, neck, wrists and other parts of the body, so the phenomenon of white patches appearing on the back of the neck can occur. 2. White chaff rash: the cause of white chaff rash is not clear, may be related to Malassezia furfur, and malnutrition, dry skin and other triggering factors. White furfura will lead to local skin round or ovoid, edge is not clear mild pigmentation spots, which is manifested in the back of the neck white, some patients are also prone to accompanied by dry fine chaffy white flakes and so on. 3. florid chaff rash: florid chaff rash can also cause some patients with white patches on the back of the neck, mainly related to the infection of Malassezia, with a certain genetic susceptibility. In addition to skin lesions, patients generally have no conscious symptoms, and occasionally have a mild itching sensation. It is recommended that the person with white lumps on the back of the neck should consult a doctor for examination, and follow the doctor’s instructions for treatment after clarification of the disease, and should not use drugs or prescriptions indiscriminately on his own.