Frequent hunger may be related to irrational dietary structure, diabetes, hyperthyroidism, psychiatric disorders, digestive disorders and so on. 1. Irrational dietary structure: such as lack of protein and fat intake when eating, simply eating vegetables and fruits, digestion and absorption is too fast, it is difficult to have a sense of satiety, followed by frequent hunger. 2. Diabetes mellitus: diabetic patients are in a state of long-term glucose metabolism disorders, the body can not effectively utilize the glucose in food to provide energy, so it is also easy to produce a sense of hunger. 3. Hyperthyroidism: excessive secretion of thyroxine causes the body’s metabolic rate to accelerate, the patient’s basal metabolic rate is high, the energy consumption is faster, so it is easy to have hunger pangs. 4. Mental illness: when in a state of excessive tension, anxiety or even depression for a long period of time, some people may also experience symptoms of frequent hunger. 5. Digestive system diseases: some high gastric acid secretion state, such as duodenal bulb ulcer patients can also appear frequent hunger. Frequent hunger may also be caused by other reasons, it is recommended to consult a doctor in a timely manner, under the guidance of a professional physician to determine the cause of the disease, and active treatment.