Not eating dinner for a long time will lead to malnutrition, gastroenteritis, low blood pressure, hypoglycemia and other diseases. 1. Malnutrition: not eating dinner for a long time will lead to a long interval between lunch and breakfast, and insufficient supply of sugar, protein and lipids in the body will lead to malnutrition in patients with impaired growth and development. 2. Gastroenteritis: not eating dinner for a long time will lead to abnormal secretion of gastric acid, ulceration and erosion of the mucous membrane of the intestinal wall of the stomach and intestines, gastrointestinal dysfunction, which will induce gastroenteritis. 3. Hypotension, hypoglycemia: not eating dinner for a long time, resulting in insufficient supply of energy to the body, the patient’s blood pressure imbalance, the body’s blood pressure, blood sugar is too low, causing dizziness, fatigue and other adverse reactions.