The following are some of the reasons for men to have blood in their stool: 1. Consider the presence of colon and rectal tumors. The tumors are different from normal tissues, the surface mucosa is very fragile, friction with stool will lead to bleeding, therefore, blood in the stool is visible. 2, consider the presence of internal hemorrhoids, internal hemorrhoids is a common anal disease that can easily lead to bleeding, from stage 1 internal hemorrhoids to stage 4 internal hemorrhoids will have bleeding. 3, consider the presence of anal fissures, mostly seen in patients with acute constipation and chronic constipation, due to The most important thing is that you can get a good idea of what you are looking for.