Generally speaking, gastric cysts are not cancerous. Gastric cyst is a benign disease, while gastric cancer is a malignant tumor, and there is no necessary connection between them. Gastric cyst is a cystic mass formed at the gastric mucosa due to the obstruction of mucus secreted in the stomach or digestive fluid discharge. Gastric cyst is a benign lesion of the stomach, which can be repaired naturally after the wall of the cyst breaks down, or it may recur. After the appearance of gastric cysts, cystectomy or cyst debridement can be performed to discharge the secretion inside and promote the healing of the disease. Gastric cysts are mostly caused by trauma and chemical irritants. The main symptoms are indigestion, nausea, vomiting, etc. In severe cases, gastrointestinal bleeding may occur, and pyloric obstruction may result if the cysts keep enlarging. Once symptoms of gastric cysts appear, gastroscopy should be performed in the hospital for a clear diagnosis and related treatment. Most gastric cysts can be cured after surgical resection and are usually not cancerous, but if the patient is worried about cancer, he/she can have a pathologic section examined. After the diagnosis of gastric cyst is confirmed, follow the doctor’s instructions to carry out appropriate treatment to avoid further development and deterioration of the condition.