Hemorrhoids vs. Colorectal Cancer
Seeing blood in your stool can be alarming. However, many people reassure themselves by thinking, "It's probably just hemorrhoids. It'll go away on its own." Unfortunately, self-diagnosis and delaying medical evaluation may cause you to overlook one of the most important warning signs of colorectal cancer.
Because hemorrhoids and colorectal cancer can share similar symptoms—especially blood in the stool—the Gastroenterology and Hepatology Department at Thonburi Thawi Watthana Hospital (THT) has compiled the following comparison to help you recognize the differences and know when to seek medical attention.
Hemorrhoids vs. Colorectal Cancer: How to Tell the Difference
When you notice changes in your bowel movements, observing the appearance of your stool and accompanying symptoms may help distinguish between these two conditions.
|
Signs |
Hemorrhoids |
Colorectal Cancer |
|---|---|---|
|
Appearance of Blood |
Bright red blood that appears after a bowel movement or on toilet paper. The blood is usually not mixed with the stool. |
Dark red or maroon blood that is often mixed with the stool, sometimes accompanied by mucus. |
|
Stool Shape |
Stool size and shape are generally normal (unless constipation is also present). |
Narrow, pencil-thin stools caused by a tumor partially blocking the colon. |
|
Bowel Habits |
Difficulty passing stool due to hemorrhoids or constipation, but bowel habits remain largely unchanged. |
Persistent changes in bowel habits, such as alternating constipation and diarrhea or a feeling of incomplete bowel evacuation. |
|
Other Symptoms |
Itching or irritation around the anus, or a soft lump protruding during bowel movements. |
Persistent abdominal pain, bloating, fatigue, anemia, loss of appetite, and unexplained weight loss. |
Warning Signs That Require Prompt Medical Attention
Although these symptoms may help distinguish between hemorrhoids and colorectal cancer, some people may have both conditions at the same time. Therefore, you should seek medical evaluation if you experience any of the following:
Blood in your stool lasting longer than 1–2 weeks
A significant and persistent change in bowel habits, such as chronic constipation alternating with diarrhea
Unexplained anemia, fatigue, or pale complexion
A family history of colorectal cancer in a first-degree relative (parent, sibling, or child)
Early Screening Brings Peace of Mind
Colorectal cancer usually develops slowly from small polyps in the lining of the colon. Detecting these abnormalities at an early stage allows physicians to provide the most effective treatment and significantly improves outcomes.
Today, colonoscopy is considered the gold standard for colorectal cancer screening. This procedure enables physicians to examine the entire colon in detail and remove precancerous polyps during the same examination, helping reduce the risk of colorectal cancer in the future.
Take Care of Your Digestive Health
If you notice any changes in your bowel habits or would like to undergo colorectal cancer screening for peace of mind, consult a gastroenterology specialist for a comprehensive evaluation. For consultation or more information, please contact : Gastroenterology and Hepatology Department
Thonburi Thawi Watthana Hospital (THT)
