In fact, many diseases of the gastrointestinal tract can cause chronic blood loss, and this kind of gastrointestinal bleeding is invisible to the naked eye, so yellow stool does not mean that there is no small amount of gastrointestinal bleeding, the human gastrointestinal tract is very long, and every part of the body may have such and such diseases that cause bleeding, and over time the patient will bleed and become dizzy, weak, pale, and malnourished. Some patients fall and injure themselves due to dizziness, which causes serious consequences. If you have anemia and gastrointestinal symptoms at the same time, it is highly recommended to consult the gastroenterology department, which can do various examinations, and the whole gastrointestinal tract can be examined with the current equipment.