Long-term enteral nutrition will have mechanical complications, metabolic complications, gastrointestinal complications and so on. 1. Mechanical complications: The catheter that enters the intestine is too thick and hard, which causes irritation as well as damage to the mucous membrane, leading to blockage of the nutritional tube and catheter ectasia, so it is recommended to use a catheter that is not too thick and hard to avoid causing damage to the nasal cavity. 2. Metabolic complications: due to electrolyte imbalance or overnutrition, which leads to metabolic abnormalities, in enteral nutrition, we need to pay attention to the detection of blood and urine glucose, and give the appropriate nutrition. 3. Gastrointestinal complications: if nausea, vomiting, diarrhea and abdominal distension occur, it may be that the patient has chosen a nutritional formula that is not suitable for him or her, and is prone to bacterial infections; if there are such symptoms, it is recommended to stop nutritional titration. 4. Aspiration pneumonia: Because the nutritional tube can easily lead to gastric reflux, long-term gastroesophageal reflux may cause aspiration pneumonia, which is sometimes fatal for patients who have been bedridden for a long time. If the patient has complications, it is recommended to go to the hospital for timely treatment.