Pathological hunger is an abnormality of the nervous system. This type of hunger is very specific and patients mainly show drowsiness, abnormal physiological behavior, periodic sleep times, and feeling very hungry after waking up. Usually, they will eat a lot, which leads to indigestion. Patients with pathological hunger are usually obese, usually male, and eat large amounts of food. Pathological hunger is usually caused by an infection or a congenital defect in the hypothalamus at the edge of the brain. Patients with pathological hunger usually sleep day and night. Pain is also reduced during this period, and the onset usually lasts 3-5 days. The onset of pathological hunger usually lasts for 3-5 days, and the interval between mood changes and endocrine disorders is about 1 month.