Pylorus removal may cause increased emptying of gastric contents and reflux of small intestinal fluid into the stomach, resulting in corresponding symptoms such as palpitations (rapid heartbeat, often accompanied by panic), dizziness, and epigastric discomfort. After pyloromyotomy, there is a possibility that the gastric contents will empty faster and the small intestinal fluid will flow back into the stomach. Too fast emptying of gastric contents can cause dumping syndrome, which can be categorized into two types according to the time of occurrence: early stage and late stage. Early dumping syndrome is characterized by transient hypovolemia, such as palpitations and cold sweats, which occur half an hour after eating. The latter manifests as hypoglycemic manifestations such as dizziness, pallor, and cold sweats that appear 2 to 4 hours after eating, so it is also called hypoglycemic syndrome. Small intestinal fluid is alkaline, reflux to the stomach can cause gastric mucosal damage, manifested as gastric mucosal congestion, edema, erosion, clinical manifestations of burning pain behind the sternum and epigastric discomfort. After pyloromyotomy, if there is any discomfort, consult a doctor in time and standardize the treatment, so as not to delay the condition and cause damage.