Esophagitis may be caused by local external injury, weakening of the lower esophageal sphincter and peristaltic disorder of the esophagus. 1. Local external injury: Drinking alcohol, consuming food that is too hot or too rough, and taking certain stimulating drugs can cause different degrees of local injury to the esophageal mucosa, which can lead to esophagitis. 2. Weakened contraction function of lower esophageal sphincter: when the lower esophageal sphincter functions normally, it can prevent the contents of the stomach from refluxing into the esophagus, but when the contraction function of the lower esophageal sphincter is weakened, it can not effectively prevent the gastric capacity from refluxing into the esophagus, and the contents of the stomach contain a large amount of gastric acid, and the gastric acid burns the esophageal mucous membrane, which leads to the occurrence of inflammatory lesions in the mucous membrane of the esophagus. 3. Peristaltic disorder of esophagus: when gastric contents reflux into the esophagus by chance, due to the effect of tension, the esophagus will cause secondary peristaltic movement, and then the refluxed material will be sent back to the stomach; when the peristaltic function of the esophagus has been impaired, and the gastric contents refluxed into the esophagus, the gastric content can not be sent back to the stomach in time, which will lead to the occurrence of esophagitis. There are many causes of esophagitis, so it is recommended to go to the hospital in time to get a clear picture of the cause of the disease, and then treat the cause of the disease under the guidance of the doctor.