In life, some people feel very hungry after eating a lot of food and still not feeling full or just shortly after eating. Hunger arises because of the decrease in blood glucose concentration. However, there are several reasons for this. The first is the cause of the blood itself, this type of person is born with a blood sugar concentration that is lower than the normal concentration, which can lead to feeling hungrier and less uncomfortable no matter how much you eat. The second is due to problems in the digestive tract, you should take some drugs to help digestion, under the guidance of a doctor. The third kind, which may be an excessive secretion of thyroid hormones, is reflected in a very irritable temper. At the same time accompanied by a thin body, it is recommended to go to the hospital as soon as possible to check the thyroid gland. The fourth, it is possible that the liver is not functioning properly, resulting in the liver not being able to properly break down glycogen to maintain normal human activity, which will lead to continued consumption of the little glycogen consumed in the blood, causing increasingly heavy adverse reactions.