I use that bathroom and blood came out of me i want to know what that is?

Bleeding: You need to be more specific. Did you have rectal bleeding or did you have blood or bloody urine. If you had rectal bleeding, go to the er and get evaluated asap. The causes could be bleeding from hemmorhoids, cancer, among others. If you had blood in your urine, you may have a uti, bleeding from the kidneys, ureters or bladder. In that case, see a urologist.