Itching is associated with a variety of diseases, and it is necessary to first identify the cause of the disease, and then carry out symptomatic treatment. If the itch is caused by allergies, anti-allergy treatment is feasible; if it is caused by chronic diseases, it should be treated according to the cause; if it is caused by infections, it should be treated with anti-infections. 1. Allergy: such as urticaria, eczema, contact dermatitis, etc. can be caused by itchy skin. Patients should actively search for allergens and remove them under the guidance of the doctor, and at the same time can take antihistamines such as loratadine and other drugs for treatment. 2. Chronic diseases: chronic diseases such as diabetes, uremia and other diseases may induce itching. It is recommended that patients identify the cause of the disease and actively treat the primary chronic disease. 3. Infectious factors: itchy skin caused by fungal infections, patients can use antifungal drugs such as ketoconazole, itraconazole, etc. for treatment. In short, the cause of itching on the body of many causes, the patient found itching symptoms need to go to the hospital in time, under the guidance of the doctor to identify the cause of the disease and symptomatic treatment of the cause of the drug should be used in accordance with the doctor’s instructions.