Belt-ring itch may be caused by pressure urticaria, eczema or shingles. 1. Pressure urticaria: The patient’s belt is pressed on the skin for a long time, which may lead to pressure urticaria. At the same time the excessive release of histamine and other cytokines will stimulate the local skin, resulting in significant itching of the local skin. 2. Eczema: the place where the belt is fastened may be caused by repeated friction and irritation of the belt or pants, resulting in localized eczema, localized skin lesions such as erythema, papules, blisters, keratinization, etc., and accompanied by itching symptoms. 3. Herpes zoster: after the human body is infected with varicella-herpes zoster virus, the waist of the belt may appear typical herpes zoster lesions, lesions gradually expand the area, can form a ring of itchy skin symptoms. When the place where the belt is worn a ring of skin appears obvious itching, it is recommended to go to the hospital in time to consult a doctor to clarify the cause of the disease and treatment.