Weight loss surgery is a minimally invasive procedure, and generally speaking, the hospital stay is about 1 week. One part is the preoperative examination time, which requires checking the function of heart, lungs, brain and other organs, as well as checking hormone, pituitary function, gastroscopy and endocrine function, which takes 3-4 days; the other part is the postoperative time, usually 2-3 days, when the anesthesia reaction disappears and the function of gastrointestinal tract recovers, you can be discharged from the hospital. However, for some patients with heavy combined metabolic syndrome or severe obesity, they need to spend some time for physical exercise and the length of hospital stay may be increased.