The causes of blood in the stool in women are more likely in three cases, including anal fissures, internal hemorrhoids, tumors, as follows: First, anal fissures: anal fissures are often combined with blood after the stool, tear-like pain around the anus, such patients are often combined with constipation, etc. There is also a history of patients staying up late or eating spicy food recently. Second, internal hemorrhoids: internal hemorrhoids are often fresh blood after stool, the pain symptoms are not too obvious, bleeding is also bright red blood, the amount is more. This situation is also related to constipation, with staying up late or eating spicy food. Thirdly, tumors: the situation that needs attention is colon and rectal tumors, colon and rectal tumor type of patients, fresh blood is often mixed in the stool, and the amount is not too much, while these patients may also be combined with changes in stool habits or changes in nature, such as sometimes alternating constipation or diarrhea. In addition, some patients also have a combination of anemia and wasting. In any of the above three cases, colonoscopy is recommended. The focus should be on ruling out the third condition, which is colon and rectal cancer.