Causes of Blood in Stool Beyond Hemorrhoids and Anal Fissures - Surgery

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In addition to anal fissures and hemorrhoids, are there other factors that can also cause blood in the stool?


Hello, Dr.
Ke.
In the past month, I have noticed blood on the toilet paper after having a bowel movement.
Initially, I only saw blood on the toilet paper, but later there was blood in the toilet bowl as well, and the amount of blood on the toilet paper has significantly increased.
Today, I visited a surgeon who examined me and said there were no hemorrhoids.
He advised me to take medication for three days, and if the bleeding continues, I should go to a major hospital for further evaluation.
I read online that both colorectal cancer and hemorrhoids can cause bright red blood in the stool, and my blood in the stool is bright red.
When I consulted the doctor, he mentioned that it is not hemorrhoids or an anal fissure, and he is concerned it might be colorectal cancer.
I would also like to know if there are other factors besides anal fissures and hemorrhoids that could cause blood in the stool.

Mu Mu, 20~29 year old female. Ask Date: 2017/08/11

Dr. Ke Fangxu reply Surgery


There are many causes of bloody stools, with hemorrhoids and anal fissures ranking as the top two.
Other causes include cancer, vascular abnormalities, intestinal inflammation, trauma, and more.
Physicians will assess based on age and related symptoms.
If there are still concerns, a colonoscopy can be performed for further evaluation.

Reply Date: 2017/08/11

More Info


Blood in the stool can be alarming, and while hemorrhoids and anal fissures are common causes, there are several other potential reasons for this symptom that should be considered. It's good that you've already consulted a surgeon and are taking their advice seriously. Here, I will outline some possible causes of blood in the stool beyond hemorrhoids and anal fissures, as well as provide some additional context regarding the importance of further evaluation.

1. Diverticular Disease: Diverticulosis, which involves the formation of small pouches in the colon wall, can lead to diverticulitis if these pouches become inflamed or infected. This condition can cause bleeding, often presenting as bright red blood in the stool.

2. Colorectal Polyps: Polyps are growths on the lining of the colon or rectum. While many polyps are benign, some can develop into cancer over time. They can cause bleeding, which may be visible in the stool.

3. Colorectal Cancer: As you mentioned, colorectal cancer is a serious condition that can present with symptoms such as blood in the stool, changes in bowel habits, and unexplained weight loss. The presence of bright red blood can indicate bleeding from the lower gastrointestinal tract, which includes the colon and rectum.

4. Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease and ulcerative colitis can cause inflammation in the gastrointestinal tract, leading to symptoms such as abdominal pain, diarrhea, and blood in the stool. The blood may be mixed with stool or appear as bright red streaks.

5. Gastrointestinal Infections: Certain infections can cause inflammation and bleeding in the intestines. Bacterial infections, such as those caused by Salmonella, Shigella, or E. coli, can lead to bloody diarrhea.

6. Angiodysplasia: This is a condition characterized by abnormal blood vessels in the gastrointestinal tract, which can lead to bleeding. It is more common in older adults and can be a source of unexplained gastrointestinal bleeding.

7. Ischemic Colitis: This occurs when blood flow to a part of the colon is reduced, often due to narrowed or blocked blood vessels. It can cause abdominal pain and bloody stools.

8. Medications: Certain medications, particularly anticoagulants (blood thinners) and nonsteroidal anti-inflammatory drugs (NSAIDs), can increase the risk of gastrointestinal bleeding.

Given your symptoms and the fact that the bleeding has increased, it is crucial to follow up with a healthcare provider, especially if the bleeding persists or worsens. A thorough evaluation may include a colonoscopy, which allows direct visualization of the colon and rectum, and can help identify any abnormalities such as polyps, tumors, or signs of inflammation.

In addition to the physical examination and any imaging studies, your doctor may also consider laboratory tests to evaluate your blood counts and check for signs of anemia, which can result from chronic blood loss.

In summary, while hemorrhoids and anal fissures are common causes of blood in the stool, there are numerous other potential causes that should be investigated. It is essential to take this symptom seriously and work closely with your healthcare provider to determine the underlying cause and appropriate treatment. Early detection and intervention can significantly improve outcomes, especially in cases of serious conditions like colorectal cancer.

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