Flat lesions at the ridge and heel of the cardia, which usually refer to morphological and functional changes in the position of the cardia orifice, may cause diseases such as pancreatic achalasia, pancreatitis, and pancreatic cancer. 1. Pancreatic dystrophy: It is usually caused by a flat lesion at the ridge of the cardia, which leads to neuromuscular dysfunction in the esophagus, thus causing pancreatic dystrophy, which may lead to difficulty in swallowing and pain behind the sternum. 2. Pancreatitis: usually due to improper diet, Helicobacter pylori infection and other factors, pancreatitis is caused by flat-type lesions at the ridge and heel of the pancreatic valve, and symptoms such as acid reflux and heartburn may occur. 3. Pancreatic cancer: It may be caused by bad living habits, improper diet, repeated friction of mucosa and epithelium at the gastric junction, which results in flat-type lesions at the heel of the pancreatic ridge, and then pancreatic cancer may appear, and pancreatic cancer usually causes symptoms such as dysphagia and pain in swallowing. If the phenomenon of flat lesion at the ridge and heel of cardia occurs, one should go to the hospital in time, complete the examination, make a clear diagnosis and follow the doctor’s instruction for treatment, so as to avoid the adverse consequences.