The physiological reasons for not feeling full or bulimia nervosa, parasitic infections, hyperthyroidism, hyperactive intestinal motility, diabetes and other pathological factors, need to be clearly diagnosed, after giving reasonable treatment to avoid excessive gluttony and other physical discomfort. 1, physiological reasons: young and strong when the body grows and develops rapidly, physical energy consumption is too fast, easy to feel not full, this is a normal phenomenon. Pay attention to strengthening nutrition, proper exercise, reasonable rest, to ensure physical fitness; 2, bulimia nervosa: recurrent episodes of overeating, accompanied by compensatory behavior to prevent weight gain, and excessive concern for their own weight, body shape as the main characteristics of an eating disorder. Psychological intervention can be carried out, treatment can be antidepressants, such as fluoxetine, anticonvulsants, such as phenytoin sodium and carbamazepine treatment; 3, parasitic infection: intestinal roundworm can cause wasting, abdominal pain and hunger and other conditions, it is recommended that the diet is light, regular, strengthen nutrition, can go to the hospital to check the stool routine, clear whether there is roundworm disease, if there can be applied deworming drugs, such as albendazole and other treatment; 4, thyroid function Hyperthyroidism: Excessive secretion of thyroid hormone leads to an increase in the body’s basal metabolic rate and systemic calorie consumption, and there will be a feeling of not having enough to eat. If this occurs, accompanied by weight loss, excessive sweating, panic, nervousness, anxiety, insomnia, etc., the occurrence of hyperthyroidism is considered, it is recommended to actively go to the hospital for examination, pay attention to rest, strengthen exercise, control the amount of iodine in the diet, etc.; 5, hyperactive intestinal motility: is a common symptom of gastrointestinal disease caused by gastrointestinal tract dysfunction, manifested as increased exhaustion, abdominal distension, more frequent bowel movements than usual, etc. Symptoms. Usually pay attention to the regulation of intestinal function, regular diet, three meals regularly, quantitative, eat more warm, easy to digest food, as well as probiotics, lactobacillus tablets, rich in vitamin A, vitamin B, vitamin C food, etc.; 6, diabetes: diabetes is a group of metabolic diseases characterized by high blood sugar, will lead to more drinking, more urine, more food, manifested as not enough to eat, easily hungry. If you suspect this condition, you can go to the hospital to do blood sugar monitoring and glucose tolerance test to make a clear diagnosis. Treatment is based on blood sugar control and can be treated with oral hypoglycemic drugs such as metformin or long-term insulin injections.