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.
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
- 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.
Jan. 06, 2022
- Strate L. Etiology of lower gastrointestinal bleeding in adults. https://www.uptodate.com/contents/search. Accessed Jan. 16, 2020.
- Gastrointestinal bleeding. National Institute for Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/digestive-diseases/gastrointestinal-bleeding. Accessed Jan. 16, 2020.
- Understanding minor rectal bleeding. American Society for Gastrointestinal Endoscopy. https://www.asge.org/home/for-patients/patient-information/understanding-minor-rectal-bleeding. Accessed Jan. 16, 2020.
- Innes JA, et al., eds. The gastrointestinal system. In: MacLeod's Clinical Examination. 14th ed. Elsevier. 2018. https://www.clinicalkey.com. Accessed Jan. 16, 2020.
Original article: https://www.mayoclinic.org/symptoms/rectal-bleeding/basics/when-to-see-doctor/sym-20050740