Sequelae of endoscopic surgery for esophageal smooth muscle tumor are related to the effects of local conditions after the surgery, mainly including dysphagia, chest pain and gastroesophageal reflux. 1. Difficulty in swallowing: local scarring will be formed after the surgery, which will affect the expansion and peristalsis of the lumen and further lead to the symptom of difficulty in swallowing. 2. Chest pain: the operation may damage the local soft tissues and nerves, which will cause chest pain and discomfort. 3. Gastroesophageal reflux: smooth muscle tumor is located under the cardia, which may lead to gastroesophageal reflux after surgery. Once the corresponding condition occurs after the operation, it is necessary to seek medical observation in time and carry out standardized treatment under the guidance of clinicians to try to alleviate the symptoms.