The most common cause of this symptom is a psychological problem. There is no organic lesion in the digestive tract itself, but if the patient is overworked for a long time, depression, etc., it can lead to a disorder in the body’s nervous system, and there is no hunger, but the body can eat when it sees food. In fact, the body is constantly moving and consuming energy, so the body needs to eat. Although the individual does not feel hunger for subjective reasons, the body needs energy urgently and can eat like a normal person at the sight of food. Another part of the reason is due to the different sensitivity of each person to blood glucose concentration, when the sensitivity to blood glucose is low, the body’s hunger will be greatly reduced and no symptoms of hunger will appear.