The junction of the esophagus and stomach is called the cardia, which is a normal anatomical structure, and there is also the pylorus, which is the junction of the stomach and duodenum. Under normal circumstances the cardia is in a closed state, after swallowing food to the esophagus will pass through the esophagus peristalsis to the place of the cardia, the cardia will naturally open to transfer food to the stomach, the food in the stomach cavity after digestion will reach the duodenum through the pylorus. In the location of the duodenum to absorb nutrients, and then into the small intestine, large intestine, and finally out of the body. The cardia will usually have inflammatory lesions or will develop esophageal cardia mucosal tearing syndrome, which is a more serious disease that belongs to the upper gastrointestinal tract bleeding, mainly due to heavy alcohol consumption and frequent vomiting occurs after. Patients who want to know the condition of the cardia or want to see if there is a lesion in the cardia need to do an electronic gastroscopy, consulting with a specialist for details.