Back scraping is not recommended for people with back acne. Back acne refers to acne in Chinese medicine, which is a chronic inflammatory disease. Its clinical characteristics are papules, pustules and other rashes occurring on the face, chest, back and other places, often accompanied by sebum overflow. It is mostly seen in adolescent men and women. The disease mechanism is mainly characterized by lung heat and gastrointestinal dampness and heat in the early stage, and phlegm and stasis in the late stage. In the early stage, it can be caused by the prevalence of Yang heat in the body, the heat in the lungs, the wind, or the over-eating of spicy, sweet and thick flavors, the dampness and heat in the stomach and intestines, and the fumigation of the back. Late stage can be due to the lack of spleen qi, dysfunction of transportation, dampness and turbidity within the stop, the depression for a long time into heat, heat burns fluid, frying and refining into phlegm, dampness, heat and phlegm stagnation of the skin and the development of the disease. This disease should first identify the etiology of the disease and then choose the treatment method, external treatment method mainly includes external medication, needle cans, etc. Gua Sha may lead to local skin ulceration, the evil venom flow and produce adverse consequences, so it is generally not recommended to gua sha treatment. For the back of the acne crowd, should pay attention to personal hygiene, diligent bathing, diligent change of clothes. If necessary, you should consult a doctor in time, under the guidance of the doctor, not self-treatment.