Constant hunger in the abdomen may be due to normal physiological phenomena, diabetes, hyperthyroidism and other reasons. 1. Normal physiological phenomenon: exertion, emotional excitement and other reasons may lead to an increase in energy consumption, the symptoms of constant hunger in the abdomen. 2. Diabetes mellitus: In diabetes mellitus, the glucose in the blood cannot be utilized by the body due to the decrease of insulin or insulin resistance, and the body lacks energy, resulting in the symptom of constant hunger in the abdomen. 3. Hyperthyroidism: In hyperthyroidism, the increased secretion of thyroid hormones leads to an increase in the body’s basal metabolic rate, and the symptom of constant hunger in the abdomen may also occur. There may also be other causes of abdominal hunger, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.