Bright Red Blood in Stool: Causes and Concerns - Surgery

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Rectal bleeding


Since last week, I have noticed bright red blood in the toilet whenever I strain during a bowel movement, and there is also blood on the toilet paper when I wipe (I have never experienced these symptoms before).

Niming, 10~19 year old female. Ask Date: 2016/03/28

Dr. Yu Mingchang reply Surgery


Hello: Eating more fruits and vegetables may lead to internal hemorrhoid bleeding.
Please take some time to consult the Department of Colorectal Surgery at Changhua Hospital, Ministry of Health and Welfare, as they care about your health.

Reply Date: 2016/03/28

More Info


Bright red blood in the stool can be alarming and is often a cause for concern. It is important to understand the potential causes and when to seek medical attention. The presence of bright red blood typically indicates that the bleeding is occurring in the lower gastrointestinal tract, which includes the rectum and anus. Here are some common causes of bright red blood in the stool:
1. Hemorrhoids: One of the most common causes of bright red blood in the stool is hemorrhoids. These are swollen veins in the rectum or anus that can bleed during bowel movements, especially if there is straining involved. The blood is usually bright red and may be seen on the toilet paper or in the toilet bowl.

2. Anal Fissures: An anal fissure is a small tear in the lining of the anus, often caused by passing hard stools. This can lead to sharp pain during bowel movements and bright red blood.

3. Diverticular Disease: Diverticulosis, which involves the formation of small pouches in the colon wall, can lead to diverticulitis if these pouches become inflamed. This condition can cause bleeding, which may present as bright red blood.

4. Colorectal Polyps or Cancer: Polyps are growths on the lining of the colon or rectum that can bleed. While many polyps are benign, some can develop into colorectal cancer. Blood from these sources may also be bright red.

5. Gastrointestinal Infections: Certain infections can cause inflammation and bleeding in the gastrointestinal tract, leading to bright red blood in the stool.

6. Inflammatory Bowel Disease (IBD): Conditions such as Crohn's disease and ulcerative colitis can cause inflammation and bleeding in the intestines, resulting in blood in the stool.

Given that you have recently started experiencing this symptom, it is crucial to monitor your condition closely. If the bleeding persists, increases in volume, or is accompanied by other symptoms such as abdominal pain, changes in bowel habits, or weight loss, you should seek medical attention promptly. A healthcare provider may recommend a physical examination, possibly including a rectal exam, and further diagnostic tests such as a colonoscopy to determine the underlying cause of the bleeding.

In the meantime, it is advisable to avoid straining during bowel movements. You can achieve this by ensuring adequate hydration, consuming a high-fiber diet, and possibly using stool softeners if necessary. If hemorrhoids or anal fissures are suspected, over-the-counter treatments may provide relief.

In summary, while bright red blood in the stool can often be attributed to benign causes like hemorrhoids or anal fissures, it is essential to take this symptom seriously. Early evaluation and diagnosis can help rule out more serious conditions and ensure appropriate treatment. Always consult with a healthcare professional for personalized advice and management based on your specific situation.

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