If one encounters blood in their stool while defecating, many may feel panicked. In such cases, it is crucial to promptly visit a hospital for examination and diagnosis. What causes bright red blood in stool? One possible cause is hemorrhoids, which can lead to bleeding in stool. Generally, the blood caused by hemorrhoids is bright red and does not mix with the stool, essentially not forming bloody stool. If this is the case, it is caused by hemorrhoids. Anal fissures can also cause bleeding in stool, as they may lead to capillary rupture and bleeding. When wiping, one may notice blood seeping out, and there may be severe pain after bowel movements. We must take anal fissures seriously and actively seek medical attention. Besides the common conditions of anal fissures and hemorrhoids that can cause bleeding, colitis may also lead to the presence of pus and blood in stool, which is a more severe condition and should be taken seriously. When experiencing hematochezia, besides actively seeking medical attention, it is important to maintain cleanliness and hygiene of the anus, which can be cleaned with warm water.