There are many complications of nasal feeding, the following are common clinically: First, gastrointestinal complications, gastrointestinal complications include diarrhea and constipation, diarrhea is commonly caused by the use of hypertonic diet at the beginning of nasal feeding, resulting in a large amount of water entering the gastrointestinal tract, stimulating intestinal peristalsis and producing diarrhea. Infectious diarrhea may occur during the injection process, and diarrhea may also occur when the fat in the liquid diet is too high, and the amount of water used during the injection process is too large and too fast. Second, it can also cause constipation in patients, which is mostly due to prolonged bed rest and slowed intestinal motility. Third, metabolic complications such as hyperglycemia, hyperglycemia in patients with severe craniocerebral injury, and a large number of nasal feeding hypertonic sugar solution and brain injury stress response. Fourth, there can also be nasopharyngeal injury caused by the nasal feeding tube, if the nasal feeding tube appears to be blocked or dislodged from the tube, it can cause injury to the patient.