The more you scratch, the more itchy the rash needs to be treated according to its cause, such as mosquito bites, hives, eczema, physical stimulation, etc., after the factors are clear, choose general treatment or drug treatment. 1. Mosquito bites: mosquito bites can cause the phenomenon of itchy rashes on the body, if the symptoms are mild, there is no need for special treatment, avoid scratching with your hands. 2. hives: hives may be related to allergies, autoimmune disorders, can cause a long rash on the body the more itchy phenomenon, the treatment needs to follow the doctor’s instructions to take anti-allergy drugs, such as chlorpheniramine maleate, cetirizine hydrochloride tablets, etc., and at the same time need to stay away from allergens. 3. Eczema: Eczema is caused by a variety of internal and external factors in the superficial dermis and epidermis of the inflammation, can cause skin lesions, resulting in a long rash on the body the more itchy phenomenon. Treatment can follow the doctor’s instructions to use boric acid solution and other wet compress treatment, relieve itching, while with Dinaid cream for external use. 4. Physical stimulation: the more you scratch the more itchy rash on the body may also be due to hot and cold, ultraviolet radiation, friction and other factors, it should be to remove the causes, no special treatment, if there is obvious itching, you can use glycerine lotion and other topical coating. Rash on the body more scratching the more itchy causes, the symptoms suggest timely medical treatment, clear diagnosis and take treatment as prescribed by the doctor, the above drugs should be used under the guidance of the doctor, can not be used indiscriminately, so as not to lead to adverse consequences.