The itchy body lying in bed is not necessarily caused by mites, but also includes physiological factors, such as hair irritation, mood irritability, and disease factors, such as urticaria, pruritus, etc. For such cases should be analyzed specifically. For such cases should be specifically analyzed, not generalized. 1, mites: If the mattress, bedding has not been cleaned for a long time, do not pay attention to personal hygiene or poor living environment, may be mites caused by itching all over the body. Usually scabies mites cause increased itching at night, and there is a possibility of scabies. Dust mites usually do not cause itching all over the body, but can cause allergic reactions in the respiratory tract; 2. Physiological factors: Since mattresses and bedding may have hair present, people with more sensitive skin will have itching when they are stimulated. In addition, if the mood is irritable and high temperature will lead to increased sensitivity of nerve endings, there may also be itching all over the body, which is also a physiological phenomenon; 3, disease factors: patients allergic to bed sheets and bedding, there will be pruritus and hives. In addition, heat rash may appear when the temperature is high, resulting in unbearable itching all over the body. In summary, patients lying in bed with itching all over the body, may be caused by mites, may also be caused by other factors, it is recommended to exclude physical disease factors first, especially patients with papules, desquamation symptoms, should promptly go to the hospital for treatment. At the same time, you should keep your personal hygiene and environmental hygiene clean, wash your bedding regularly and put it under the sun to effectively sterilize and remove mites.