What is the cause of stool bleeding after the same room?

After the same room, there is stool bleeding phenomenon, it may be because they suffer from hemorrhoids, or anal fissure, in the process of the same room, leading to wound expansion, resulting in blood in the stool afterwards. Secondly, when the same room is more intense. If you accidentally damage the anus, resulting in anal skin damage, this will also cause stool bleeding phenomenon.