There are many reasons for advanced swelling of esophageal cancer, the most common advanced tumor edema is mainly that the tumor competes with the body for nutrition, resulting in malnutrition of the body. For example, serum protein is relatively low, leading to low-protein edema, which will appear as edema of both lower limbs, and in severe cases, ascites, pleural fluid and pericardial effusion. It also depends on the nature of the edema. For example, if the edema is unilateral or asymmetric, a series of other related factors should be considered, such as advanced tumor patients, and patients with advanced cancer who are bedridden and have poor blood circulation in the lower extremities, which can lead to thrombosis and embolism. Therefore, edema in advanced esophageal cancer should be divided into cases and not be generalized, and factors such as those leading to thrombosis and embolism should also be excluded.