Not hungry always want to eat is related to factors such as gastrointestinal dysfunction, gastric ulcer, hyperthyroidism and diabetes. In patients with gastrointestinal disorders, there is no organic disease in the digestive system, but the digestion of food will be affected. Many people during the disease will have a faster digestion of food in the stomach because of hyperactive gastrointestinal peristalsis, thus leading to a total desire to eat. Patients with gastric ulcers have pain in the stomach about 1-2 hours after a meal due to excessive secretion of acid stimulated by food, when a small amount of food intake can neutralize stomach acid to reduce pain. Hyperthyroidism and diabetes are diseases caused by abnormal metabolic functions, which not only affect the health of the patient, but also cause the performance of always wanting to eat because the energy in the body is excessively consumed and therefore a large amount of food intake is needed to maintain physical energy.