Old want to eat with diabetes, hyperthyroidism, hyperdigestion and other factors related to a short period of time, the intensity of work or exercise is relatively large, resulting in the intake of food is rapidly emptied, so there will always be the phenomenon of hunger in the stomach, there will be the performance of the old want to eat. In addition, the factors of the disease can also lead to this situation, diabetic patients in the early stage is prone to excessive drinking, urination, polyphagia, weight loss and other obvious manifestations, will also be accompanied by dry mouth, thirst, body fatigue, etc., by going to the hospital to carry out a fasting blood glucose test can be confirmed diagnosis. Patients with hyperthyroidism will have faster gastrointestinal peristalsis, so they will have excessive eating and drinking, weight loss, excessive sweating, easy to get excited, etc., which can be clarified by the results of the thyroid function test. Patients with hyperdigestive function are prone to want to eat due to psychological factors, which can be improved by proper diet control and relaxation. In addition to this, some women with better digestive function in the early stages of pregnancy may also experience this condition.