The gastroscopic manifestation of esophageal cancer may be better understood. In the middle and late stage, the tumor may manifest as a distinct lump protruding into the esophageal lumen, and the patient may have difficulty swallowing and cannot eat, which is the folk saying of not being able to swallow food, and in the end, even cannot drink water. Nowadays, because the performance of gastroscopy is getting better and better, some of the early stage tumors can be detected. Early stage tumors often do not have obvious masses, mainly manifesting as color change of esophageal mucosa, red, white, some local roughness, and also as slight elevation and depression, at this time the patient’s esophagus is very clear, and the patient will not feel anything when eating, so there is often no symptom at this time, however, individual sensitive people can also have some slight symptoms, that is, the patient feels unclean when swallowing, especially when eating semi-solid food. It feels like there is a lingering in the swallowing area. In addition, sometimes patients may have foreign body sensation and something in their chest, because the local smoothness of tumor patients has decreased, so the patient always feels something in the area, which suggests that they should have gastroscopy.