Esophageal cancer is not self-tested, you need to go to hospital for relevant examination to confirm the diagnosis. Early symptoms of esophageal cancer are not very obvious, similar to esophagitis. Early esophageal cancer can be completely cured by surgery, so esophagoscopy and gastroscopy should be carried out as early as possible to confirm the diagnosis. Esophageal cancer refers to malignant tumor of epithelial origin in esophagus. In early stage, there may be no obvious symptoms or choking sensation or foreign body sensation behind the sternum when eating, and in middle and late stage, there are usually progressive dysphagia, persistent retrosternal pain or grief and other symptoms. When patients have symptoms of middle and late stage, patients will miss the best time for treatment. Diagnosis simply by symptoms may affect the effect of treatment, so esophageal cancer is not self-tested. Therefore, if patients want to know whether they are suffering from esophageal cancer, they should go to the hospital for esophagoscopy or gastroscopy in time, and they can extract biopsy for pathological examination during the examination, so as to find out esophageal cancer in time and increase the chance of cure.