Diabetes 3 days without food can not, easy to occur ketoacidosis, hypoglycemia and other serious adverse consequences. Diabetes for a long time without eating, not enough food to supplement nutrition, energy serious depletion, will occur ketoacidosis, hypoglycemia and other serious adverse consequences, and even coma, impaired consciousness, fainting, and even death. Diabetic patients need to develop healthy and reasonable dietary habits, consume sufficient and comprehensive nutrition, and eat more meals with less food. Choose low-fat meat, vegetables, proteins, low-sugar fruits, coarse grains such as staple foods, and choose boiled, steamed and other healthy cooking methods. Diabetic patients should not lower their blood sugar by skipping meals, but should seek medical attention in time to receive regular treatment so as not to miss their condition.