Neck itch for no reason may be ringworm, solar dermatitis, allergic dermatitis caused by the patient should consult a doctor in a timely manner to clarify the cause of treatment. 1. ringworm: neck itch for no reason may be fungal infection of the superficial parts of the skin caused by ringworm, the patient will also have a clear ring of erythema on the neck, the edge of the elevated, can be used externally ketoconazole, oral itraconazole, etc. for treatment. 2. solar dermatitis: if the patient in the neck itch before the excessive ultraviolet radiation, should be considered to be solar dermatitis caused by itching, the patient will also have burning, itching, infiltrative erythema, can be used topically hydrocortisone, vitamin E for treatment. 3. Allergic dermatitis: allergens through various ways into the body, can cause local erythema, edema, itching, etc., can occur in the neck, the patient should timely detach from the allergen, if necessary, the use of loratadine, cetirizine and other drugs for treatment. Itchy neck for no reason should be timely consultation, identify the cause, follow the doctor’s instructions standardized treatment. All of the above drugs should be used under the guidance of a doctor.