The itchy body touches hot water more itchy with eczema, heat contact urticaria and other diseases. 1. eczema: eczema is caused by a variety of internal and external factors of the superficial dermis and epidermal inflammation, clinical acute lesions mainly papules, accompanied by symptoms of intense itching, eczema can be caused by a variety of factors, such as chronic foci of infection, blood circulation disorders, hot environments, and so on, if the patient is due to heat-induced eczema accompanied by itching, in contact with hot water, it will be more itchy. 2. Heat contact urticaria: this disease is mainly due to contact with 43 ℃ of warm water, generally after contact with 43 ℃ of warm water, the skin will quickly rise on the wind, red spots, accompanied by itching and pain, with hot water after bathing, the symptoms aggravated. It is recommended that patients combined with their own situation, timely to the regular hospital dermatology consultation, diagnosis, timely treatment, to avoid delaying the condition.