Itchy belly may be eczema, urticaria and contact dermatitis and other diseases. 1. Eczema: clinical manifestations of erythema, papules, itching and other symptoms, the rash can be distributed in all parts of the body, some patients may appear belly itching symptoms. The cause of eczema is still unclear, may be related to genetic, environmental and immune abnormalities and other factors. 2. Urticaria: mainly manifested as wind and erythema, mostly accompanied by itching symptoms, can occur in all parts of the body. The causes of urticaria are mostly related to drug and food allergies as well as infections. 3. Contact dermatitis: manifested as contact erythema, papules, patients are conscious of itching, burning and other symptoms, lesions can be spread with the patient scratching or involved in the surrounding areas, a small number of patients will appear belly itch. The cause of contact dermatitis is not clear, and skin contact with exogenous substances, such as clothing metal parts and so on. There are many causes of itchy belly, we recommend that patients seek medical examination to clarify the cause of the disease.