Vomiting during cesarean anesthesia is mainly due to straining. The intestinal tubes are internal organs that are sensitive to straining, especially if some people have eaten something, and the patient will vomit if they are slightly strained. If vomiting occurs, there is nothing wrong with vomiting, it is just a little bit difficult. However, if the vomit is inhaled into the lungs during the vomiting process, there will be a big problem, and aspiration pneumonia will occur. Aspiration pneumonia is a disease with a very high mortality rate, but don’t worry too much about it, the anesthesiologists will consider it in a holistic way, and insert a tube into patients with full stomachs, i.e., those who come to the surgery after they have had enough to eat to suction out the things inside their stomachs. Another way to avoid this is to do a general anesthesia intubation in the trachea after suctioning out. Sometimes it is too late, and prophylactic anti-nausea medications are used to increase the safety margin, but in reality, these do not completely avoid the possibility of aspiration pneumonia, so fasting before the operation, all kinds of surgery is.