Esophageal cancer, gastric cancer and malignant tumors around the duodenum often block the lumen and prevent patients from eating through the mouth. Many patients die not from tumor growth, but from starvation and malnutrition. Many patients die not because of tumor growth but because of malnutrition. There are many interventional treatments, but the most effective one to improve the quality of life is to place stents in the above mentioned lesions to ensure that patients can eat through the mouth. Those who are not in a position to have a stent can have a nutritional catheter placed to inject nutrients through the catheter. This does not allow the patient to enjoy the pleasure of eating, but it can sustain life without the need for intravenous fluids. In some patients with vomiting, a triple-lumen nutrient tube can be placed, which allows for nutrient infusion and gastrointestinal decompression to avoid frequent vomiting in patients with distal gastric and duodenal obstruction. In addition, there is a method called percutaneous gastrostomy, which is also a nutritional solution for these patients. These methods do not cure the disease completely, but they allow the patient to live a better and more dignified life in the limited survival period. Note: It is better not to use stents for obstruction caused by benign lesions, but if necessary, retrievable stents should be used.