Food reflux is not necessarily cancer, for example, reflux esophagitis and cardia incontinentia can also cause esophageal reflux. However, esophageal cancer patients may also cause esophageal reflux, especially when the esophageal cancer is obstructed, and after eating, esophageal reflux will occur, spitting out large amounts of mucus and food. Therefore, if you have esophageal reflux, you need to go to the hospital for examination as soon as possible. A barium meal of the upper gastrointestinal tract is needed to check the normal peristalsis of the esophagus, and a gastroscopy is also needed to see if there are malignant tumors in the esophageal mucosa. After the specific cause is identified, the corresponding treatment plan will be formulated, and if it is esophageal cancer, it should be treated as soon as possible.