Neck dryness may be caused by physiological factors, or may be caused by psoriasis, ichthyosis, eczema and other diseases. 1. Physiological factors: If the surrounding environment is too cold and dry, as well as drinking too little water, so that the loss of water in the body, will lead to patients with dry neck. 2. Psoriasis: Psoriasis is a chronic scaly skin disease caused by the interaction of various factors such as environment, infection, heredity, immunity, etc., and the patient mainly manifests symptoms such as dry and itchy skin. 3. Ichthyosis: Ichthyosis is a group of keratinization disorder skin disease characterized by dry skin with fish scale-like scales. Its cause is mainly related to genetics, diseases, drugs and other factors, some patients will appear in the phenomenon of dry neck. 4. Eczema: the etiology of eczema is not yet clear, generally associated with allergens, systemic diseases and genetic factors, clinical manifestations of erythema, edema and papules, dryness, scales and other symptoms, the disease can occur in all parts of the body surface. There are many causes of neck dryness, and after excluding physiological factors, patients are advised to go to the hospital and receive standardized treatment under the guidance of a doctor.