Spaced lipolysis back slimming is a non-contact treatment, through selective radiofrequency technology, without damaging the skin and muscles, through the transmission of high-frequency wave energy to the fat layer, inducing the natural death of the fat cells and prompting them to be discharged out of the body, so as to achieve the efficacy of slimming the back. As the treatment is non-contact, it can effectively avoid damage to blood vessels, nerves and other connective tissues around the fat, and is a relatively safe procedure. Generally, there are no side effects when the operation is carried out in regular and professional medical cosmetic surgery institutions. However, mild pain may occur at the treatment site during the procedure, which is usually within the tolerable range of most people. If the medical personnel operate improperly or the patient’s postoperative care is not proper, seroma, skin ecchymosis, skin numbness or pain, hyperpigmentation, subcutaneous hardness, unevenness of the liposuction area, etc. will occur after the treatment, which can be recovered on its own in mild cases, while serious operation errors will also lead to sequelae such as skin burns. Short-term treatment of lipolysis can not maintain the satisfactory effect, and it needs many times and courses of treatment to realize the satisfactory effect. In addition, this operation has restrictions on the applicable population, mainly for localized fat accumulation of more than 1.5cm. If this condition is not met, this operation should not be carried out to avoid unnecessary risks.