Bleeding after bm (fissures), not constipated, colonoscopy showed no chrohn's, etc. what else could cause anal fissues? allergies? stress? reflux?

Anal fissures: Some common causes of anal fissure include:Passing large or hard stools, Constipation and straining during bowel movements, Chronic diarrhea, Inflammation of the anorectal area caused by Crohn's disease or another inflammatory bowel disease, and Childbirth. You may not be constipated, but may have large stools. Activities like anal intercourse or sex toy use can cause them too. Keep up with the GI