Rectal bleeding
Definition
Rectal bleeding can refer to any blood that passes from your anus, although rectal bleeding is usually assumed to refer to bleeding from your lower colon or rectum. Your rectum makes up the lower portion of your large intestine. Rectal bleeding may show up as blood in your stool, on the toilet paper or in the toilet bowl. Blood that results from rectal bleeding is usually bright red in color, but occasionally can be dark maroon.
Causes
Rectal bleeding may occur for many reasons. Common causes of rectal bleeding include: Anal fissure (a small tear in the lining of the anal canal) Constipation — which can be chronic and last for weeks or longer. Hard stools Hemorrhoids (swollen and inflamed veins in your anus or rectum) Less common causes of rectal bleeding include: Anal cancer Angiodysplasia (abnormalities in the blood vessels near the intestines) Colon cancer — cancer that starts in the part of the large intestine called the colon. Colon polyps Crohn's disease — which causes tissues in the digestive tract to become inflamed. Diarrhea Diverticulosis (a bulging pouch that forms on the wall of the intestine) Inflammatory bowel disease (IBD) Ischemic colitis (colon inflammation caused by reduced blood flow) Proctitis (inflammation of the lining of the rectum) Pseudomembranous colitis (colon inflammation caused by an infection) Radiation therapy Rectal cancer Solitary rectal ulcer syndrome (ulcer of the rectum) Ulcerative colitis — a disease that causes ulcers and swelling called inflammation in the lining of the large intestine.
When to see a doctor
Call 911 or emergency medical assistance Seek emergency help if you have significant rectal bleeding and any signs of shock: Rapid, shallow breathing Dizziness or lightheadedness after standing up Blurred vision Fainting Confusion Nausea Cold, clammy, pale skin Low urine output Seek immediate medical attention Have someone drive you to an emergency room if rectal bleeding is: Continuous or heavy Accompanied by severe abdominal pain or cramping Schedule a doctor's visit Make an appointment to see your doctor if you have rectal bleeding that lasts more than a day or two, or earlier if the bleeding worries you.
Disclaimer: August is a health information platform and its responses don't constitute medical advise. Always consult with a licenced medical professional near you before making any changes.