If you are hungry, the most direct reason is the decrease of blood sugar concentration, but there may be many reasons.
The first type: blood problems. Some people's blood sugar concentration is always lower than the normal concentration due to characteristic (genetic) reasons. As a result, they will stay hungry until they are full. People are weak, their immunity is not strong, and they may often get sick and have no strength. (Go for a blood test)
The second type: the digestive tract function is not good. If the digestive organs such as the small intestine and stomach can't work normally, food can't be completely converted into nutrients needed by the body, resulting in low blood sugar concentration, and it is easy to get hungry just after eating. Go for a gastrointestinal examination, even including the mouth, esophagus and gallbladder.
The third type: it may also be caused by too much thyroid hormone secretion, and it will be very thin and grumpy (commonly known as hyperthyroidism, it is recommended to go to the hospital for thyroid test).
Fourth: According to the fact that you can't stand being hungry, it is "upset and hungry", or it may be that your liver function is abnormal. When the blood sugar concentration decreases, the liver can't make a correct physiological reaction to decompose glycogen to maintain normal activity energy, so it continues to consume a small amount of glycogen in the blood, causing more and more serious physiological reactions. Hungry, upset, hungry [It is recommended to check the liver and gallbladder function, which is also very important. Even if the liver function is normal and the gallbladder function is abnormal, fat can't be converted into energy substances normally, which will lead to the same consequences, except that people will get fat and can't eat greasy things]
Fifth: it may be a kidney problem. Nutrients must be filtered by the kidneys. If there is something wrong with the kidney, nutrients can't enter the blood circulation normally. As a result, the body has been in a state of malnutrition, manifested as hunger. (It is recommended to check renal function, renal tubules and filters, which may lead to diabetes. People will lose weight, have bad skin, get rashes, etc. And the urine color is abnormal)
Sixth: it may be a comprehensive performance of the above reasons. Man is a very sophisticated and advanced instrument, which can be adjusted and prompted by his own physiological response with a slight injury. So when you feel uncomfortable, your physical function has declined to a great extent, so sometimes the causes of a disease are often mixed.
Simple self-test method:
1: Evaluate your body obesity. If you are obese, it is probably the fourth or sixth type.
2. Evaluate your body's excitement. If you are excited, it is probably the third or sixth.
3. Evaluate your athletic ability. If you can do very strenuous exercise and sweat continuously, you can rule out hepatobiliary problems.
4. Evaluate your immunity. If your immunity is not strong, it is easy to get sick, mostly in the first or sixth day of junior high school.
5. Evaluation of urine color, yellow sticky words, mostly fifth or sixth.
6. Exclude other possibilities, mostly the second or sixth.
If the symptoms are not obvious and serious, most of the above symptoms can be ruled out, which may be caused by mild indigestion.
If it is a high-intensity manual worker, it is a normal reaction.
If it is adolescence, it is suggested to surf the Internet less, participate in extracurricular activities more, eat more and eat less, and not be picky about food.
You have a stomachache. It is necessary to check your gastrointestinal function, check for tumors, ulcers and so on.