What are the possible causes of rectal bleeding without pain?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Painless rectal bleeding is often caused by internal hemorrhoids, colonic polyps, or acute hemorrhagic rectal ulcers. Other possible causes include diverticulosis, angiodysplasia (abnormal blood vessels in the colon), or early-stage colorectal cancer. Because painless bleeding can signal conditions ranging from minor to serious, identifying the underlying cause early is important for effective treatment.

If you're experiencing painless rectal bleeding, don't guess or wait. A free, instant, online symptom check can help you quickly narrow down possible causes based on your specific symptoms and guide you on what steps to take next—whether that's monitoring at home or seeing a doctor promptly. Taking a few minutes now could give you clarity, peace of mind, and a smarter path forward.

Reviewed for medical accuracy: 07/15/2026

What brings you in today?

Can I treat this myself Do I need to see a doctor Where should I go for care I'm concerned about a symptom Concerned about a possible condition My symptoms are getting worse Seeking a second opinion

Not seeing your question? No worries.

Submit your own Question

Explanation

Rectal bleeding without pain can be alarming, but it is often caused by conditions that are not immediately dangerous.

Possible Causes:

Colonic Polyps: According to the study by Campbell and Sugarman, painless rectal bleeding can be associated with colonic polyps. These are small growths in the colon that can bleed without causing pain.
Hemorrhoids: Lohsiriwat describes hemorrhoids as another common cause of painless rectal bleeding. Hemorrhoids are swollen blood vessels in the rectum or anus that can bleed, especially after a bowel movement.
Acute Hemorrhagic Rectal Ulcer: Takeuchi and colleagues mention that this condition can also lead to painless rectal bleeding. It involves sudden bleeding from ulcers in the rectum.

If you experience rectal bleeding, it is important to see a healthcare provider to determine the cause and receive appropriate care. You can start by using a free symptom checker to help identify what might be causing your symptoms and understand when to seek medical attention.

(References)

Campbell AM, & Sugarman I. (2017). Does painless rectal bleeding equate to a colonic polyp?. Archives of disease in childhood, 28550146.
Lohsiriwat V. (2015). Treatment of hemorrhoids: A coloproctologist's view. World journal of gastroenterology, 26309351.
Takeuchi K, Tsuzuki Y, Ando T, Sekihara M, Hara T, Ohno Y, et al. (2001). Clinical characteristics of acute hemorrhagic rectal ulcer. Journal of clinical gastroenterology, 11500613.

Thinking about asking ChatGPT?Ask me instead

Tell your friends about us.

We would love to help them too.

For First Time Users

What is Ubie’s Doctor’s Note?

We provide a database of explanations from real doctors on a range of medical topics. Get started by exploring our library of questions and topics you want to learn more about.

Was this page helpful?

Purpose and positioning of servicesUbie Doctor's Note is a service for informational purposes. The provision of information by physicians, medical professionals, etc. is not a medical treatment. If medical treatment is required, please consult your doctor or medical institution. We strive to provide reliable and accurate information, but we do not guarantee the completeness of the content. If you find any errors in the information, please contact us.