After eating a meal after a while and then hungry may be physiological factors, but also may be acute gastroenteritis, hyperthyroidism, diabetes and other diseases caused by factors. 1. Physiological factors: If the amount of food is small, and the amount of activity increases, there will be after eating a meal after a while and then hungry. 2. Disease factors: patients with hyperthyroidism may have a high metabolic state, increased consumption, which can cause hunger after eating for a while. Diabetic patients may have more drinks, more food, more urination, weight loss, after eating a meal after a while and hungry. After excluding physiological factors, it is recommended to go to the hospital and ask the doctor to make a judgment and clarify the cause of the disease.