Duodenal stents are usually placed for 2 to 3 weeks, but in the treatment of malignant tumors, they can be placed permanently as long as no blockage occurs. Endoduodenal stenting, a therapeutic procedure in which a narrowed duodenal segment is dilated by the placement of a stent to re-establish passage, is usually placed for 2 to 3 weeks. Duodenal stent systems are designed for the palliative treatment of duodenal or gastric outlet obstruction and duodenal stenosis due to malignancy. However, stent placement is not recommended if the patient already has severe varices in the esophagus or gastric fundus. Otherwise there is a risk of hemorrhage. In addition, patients with severe cardiopulmonary abnormalities should also avoid the procedure. Due to the peristaltic movement of the intestines, the stent in the intestines is more likely to be displaced. Moreover, due to the natural curvature of the intestines, the stent in the intestines creates pressure on the intestinal wall, and the ends of the stent and the intestines create the greatest tension, which can easily lead to perforation of the intestines, bleeding, pain, and so on. After duodenal stent placement, you should follow your doctor’s instructions and contact your doctor if you have any discomfort.