Symptom: Rectal bleeding

    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 last few inches 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 can range in color from bright red to dark maroon to a dark, tarry color.

    Rectal bleeding
    1. Anal fissure (tear in the skin of the anus)
    2. Chronic constipation
    3. Hard stools
    4. Hemorrhoids

    Less common causes of rectal bleeding:

    1. Anal cancer
    2. Angiodysplasia (abnormalities in the blood vessels near the intestines)
    3. Colon cancer
    4. Colon polyps
    5. Crohn's disease
    6. Diarrhea
    7. Diverticulosis (a bulging pouch that forms on the wall of the intestine)
    8. Ischemic colitis (colon inflammation caused by reduced blood flow)
    9. Proctitis (inflammation of the rectum)
    10. Pseudomembranous colitis (colon inflammation caused by an infection)
    11. Radiation therapy
    12. Rectal prolapse (part of the rectum protrudes through the anus)
    13. Solitary rectal ulcer syndrome (a sore on the wall of the rectum)
    14. Ulcerative colitis

    Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

    Source: mayoclinic.org

    • Rapid, shallow breathing
    • Dizziness or lightheadedness after standing up
    • Blurred vision
    • Fainting
    • Confusion
    • Nausea
    • Cold, clammy, pale skin
    • Low urine output

    Have someone drive you to urgent care or an emergency room if rectal bleeding is:

    • Continuous or heavy
    • Accompanied by severe abdominal pain or cramping
    • Accompanied by anal pain

    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.

    Generally, people younger than 40 who whose rectal bleeding is from an obvious cause, such as constipation, don't need testing. However, many doctors recommend tests such as colonoscopy for people older than 40 to rule out the possibility of also having cancer that's contributing to the bleeding.

    Source: mayoclinic.org

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