If the procedure is a painless one, the patient needs to abstain from food and water before the operation. Generally, the patient can be fully awake 2 hours after the operation and can eat water and liquid diet at this time. If it is an ordinary cleanse, there is no strict restriction on eating before surgery, but it is generally recommended not to eat to avoid vomiting due to excessive pain during surgery, and patients can eat normally if they feel hungry after surgery. Patients are advised to learn about the type of cleansing surgery before the procedure and take the corresponding diet management methods according to the surgical method and medical advice. Uterine removal surgery is a common gynecological procedure that requires dilating the cervix to the size needed for the operation and then extending the scraper into the uterine cavity to scrape out the embryo, so there is a certain amount of pain during the procedure, which requires general or local anesthesia operation depending on the situation. Generally speaking, in case of painless uterine removal surgery, due to the need to use anesthesia, it is generally required to prohibit eating and drinking for 4-6 hours before the surgery to avoid vomiting during the procedure, which in turn can lead to adverse consequences such as aspiration pneumonia. For ordinary purging surgery, there is generally no strict contraindication to eating and appropriate food can be consumed. However, it is also not recommended to eat because the procedure may cause some stimulation of the gastrointestinal tract, gastrointestinal dysfunction and vagal excitation, causing nausea, vomiting and other uncomfortable reactions.