Itchy body at night may be related to environmental factors, scabies, hives, eczema and other conditions. 1. Environmental factors: if the patient’s bed sheets and bedding have not been replaced for a long time, there are mites breeding in the bed sheets and bedding, when sleeping at night, due to the skin contact with the bed sheets and bedding, the mites bite and itchy symptoms will occur. 2. Scabies: If the patient is infected by scabies, the skin will have obvious itching symptoms, especially at night, itching symptoms become more obvious, the patient will unconsciously scratch again and again, the skin area will also leave lumps. 3. Urticaria: urticaria patients will appear on the body of the red bumps of doughnut-shaped, accompanied by intense itching symptoms, in the heat and night will be aggravated. 4. Eczema: Eczema patients will have intense itching symptoms on their own skin, which will be more obvious when the temperature rises and at night. It is better for patients to go to the dermatology department in time to do systematic examination and diagnosis so as not to delay the condition.