There are two kinds of rectal cancer surgery, one is traditional open surgery and the other is minimally invasive surgery, that is, laparoscopic radical surgery for rectal cancer. Traditional open surgery has a great impact on patients’ gastrointestinal tract. Generally, patients do not have exhaust within 3 days, that is, the function of gastrointestinal tract has not recovered, so the gas inside the gastrointestinal tract accumulates inside the intestinal cavity, which will lead to gas and bloating, and if patients are in heavy condition, nausea and vomiting may occur. If patients adopt minimally invasive surgery, the impact on the gastrointestinal tract is generally small, and patients can have exhaust gas in about 2-3 days, and gas bloating is relatively rare, but of course, if the scope of rectal cancer surgery is large and traumatic, it may also lead to slowing down the function of the gastrointestinal tract and gas bloating. Some patients may also have gastrointestinal motility disorder after surgery, which is a symptom of gastroparesis, and they may also have gas and bloating.