Why Is There Blood in My Stool?
Noticing blood in your stool can be alarming, but it’s a symptom with many possible causes—some minor, others more serious. Understanding what the blood looks like, how often it appears, and any other symptoms you have can help point toward the underlying issue.
What Does Blood in Stool Look Like?
Blood in stool can appear in different ways, and the appearance often gives clues about where it is coming from:
- Bright red blood: Usually indicates bleeding in the lower digestive tract (such as the rectum or anus).
- Dark red or maroon blood: May suggest bleeding higher up in the colon or small intestine.
- Black, tarry stool: Often means bleeding from the stomach or upper digestive tract.
Common Causes of Blood in Stool
1. Hemorrhoids
One of the most common causes. Hemorrhoids are swollen blood vessels in or around the anus.
Symptoms may include:
- Bright red blood on toilet paper or stool surface
- Itching or discomfort
- Pain during bowel movements
2. Anal Fissures
Small tears in the lining of the anus, often caused by passing hard stools.
Symptoms:
- Sharp pain during bowel movements
- Bright red blood
- Burning sensation afterward
3. Constipation
Straining during bowel movements can cause both hemorrhoids and fissures, leading to bleeding.
4. Inflammatory Bowel Disease (IBD)
Conditions like Crohn’s disease and ulcerative colitis cause chronic inflammation in the digestive tract.
Symptoms may include:
- Diarrhea (sometimes with blood or mucus)
- Abdominal pain
- Weight loss
- Fatigue
5. Infections
Bacterial or viral infections in the intestines can lead to irritation and bleeding.
Possible signs:
- Diarrhea
- Fever
- Cramping
- Blood or mucus in stool
6. Diverticular Disease
Small pouches (diverticula) can form in the colon wall and sometimes bleed.
This may cause:
- Sudden, painless bleeding
- Large amounts of bright red or maroon blood
7. Polyps or Colorectal Cancer
In some cases, blood in stool can be a sign of growths in the colon or rectum.
Other symptoms may include:
- Changes in bowel habits
- Unexplained weight loss
- Persistent fatigue
- Narrow stools
8. Stomach or Upper GI Bleeding
Bleeding from the stomach or esophagus often results in black, tarry stools.
Possible causes include ulcers or gastritis.
When Should You Be Concerned?
Seek medical attention if you notice:
- Large amounts of blood
- Black or tarry stools
- Blood that keeps coming back
- Dizziness or weakness
- Severe abdominal pain
- Unexplained weight loss
Even small amounts of recurring blood should be checked by a healthcare professional.
Diagnosis and Treatment
A doctor may recommend:
- Physical examination
- Stool tests
- Blood tests
- Colonoscopy or endoscopy
Treatment depends entirely on the cause and may include medication, dietary changes, or procedures.
Final Thoughts
Blood in stool is a symptom, not a diagnosis. While many causes are minor and treatable, some require prompt medical attention. Paying attention to the type of blood, frequency, and accompanying symptoms is key to understanding what’s going on.
