General anesthesia commonly used in beauty hospitals is intravenous anesthesia, which is harmless to the body itself. All narcotic drugs have a half-life and are reversible. However, if there is reflux aspiration, apnea or oral bleeding blocking the respiratory tract during anesthesia, it may cause hypoxemia. Lack of oxygen for a long time can cause harm. Therefore, we should choose a formal medical institution and a beauty hospital with anesthesia department.