- Study guides, Class notes & Summaries

What is an anal fissure?: Tear or fissure in the anal epithelium 2. What is the most common site?: Posterior midline (comparatively low blood flow) 3. What is the cause?: Hard stool passage (constipation), hyperactive sphincter, disease process (e.g., Crohn's disease) 4. What are the signs/symptoms?: Pain in the anus, painful (can be excruciating) bowel movement, rectal bleeding, blood on toilet tissue after bowel movement, sentinel tag, tear in the anal skin, extremely painful rectal ...