If blood in the stool always occurs, the first thing to do is not to be nervous, and a routine blood test should be performed promptly to clarify the degree of blood loss. If the amount of blood loss is small, sometimes there is no specific clinical manifestation. If the degree of anemia is high, it may be manifested as weakness, lack of energy, lower blood pressure, and pale skin. If there is always blood in the stool, the amount is large and the blood loss is excessive, sometimes it can lead to shock symptoms, such as a particularly low blood pressure of less than 90 mmHg and a pulse pressure of less than 20 mmHg. If there is too much blood in the stool, the urine volume will be low. The heart and brain can suffer from myocardial damage and cerebral hypoxia due to decreased blood flow, and damage from ischemia-reperfusion, which affects the contractile function of the heart muscle. Frequent blood in the stool can also impair the normal mucosal epithelial cell barrier function in the gastrointestinal tract, which can lead to the displacement of bacteria and toxins and the formation of enterogenic infections. Therefore, if blood in the stool occurs frequently, timely examination and treatment should be performed, and if necessary, gastroscopy and enteroscopy can be performed to clarify the cause of bleeding, and then timely and symptomatic treatment.