Itchy palms and backs of hands, many are symptoms of hand eczema, papular urticaria and hives, need to go to the hospital dermatology department for a clear diagnosis and treatment. 1. Hand eczema and neuroendocrine dysfunction, emotional tension and depression and contact with external allergens. Mainly manifested as hand skin pimples, erythema, blisters and vesicles, chronic eczema is mostly manifested as hand skin roughness and hypertrophy, flaking obviously, accompanied by obvious itching. 2. Pimple urticaria, also called insect bite dermatitis, is caused by insect bites on the skin, most often seen at night in the spring and summer seasons, especially outdoor workers. The manifestation of scattered pimples on the skin, pimples in the form of round or spindle-shaped, very small blisters or red spots in the middle of the rash, itching is intense. 3. Urticaria is a strong allergic reaction, and genetic and immune function abnormalities. The main manifestation is the appearance of a large body on the skin of the wind and red spots, the rash can be fused with each other, accompanied by intense itching. The rash usually goes away within 24 hours, but it can recur and wax and wane.