Summary
- Seeing blood in your stool can be worrying, but the colour gives you important clues. Bleeding is never normal and always requires checking.
- Bright red blood usually comes from the lower bowel and can be caused by haemorrhoids or small tears in the anus, which are often minor but still need checking as it may still be cancer or polyps.
- Dark red or maroon blood may signal bleeding higher in the colon, possibly from polyps, diverticular disease, or inflammation—these conditions are serious and require timely evaluation.
- Black or tarry stools usually come from the upper digestive tract, such as the stomach or small intestine, and may indicate ulcers or other bleeding issues that need urgent attention.
Seeing blood in your stool can be worrying, and it’s natural to wonder how serious it is.
Blood can originate from different parts of your digestive tract, and while minor irritation is one possibility, it can also point to more serious conditions. Watching the colour, amount, and any accompanying symptoms gives you the information you need to act promptly and protect your health.
Here’s a handy guide!
What the Colour of Blood in Your Stool May Indicate
Bright Red Blood
If you see bright red blood, it usually comes from the lower colon or rectum. You might notice it on the surface of your stool or on toilet paper.
This type of bleeding is often linked to haemorrhoids or small tears called anal fissures, which can happen after straining, constipation, or minor injury.
Dark Red or Maroon-Coloured Stool
A darker red or maroon colour often means the bleeding is coming from higher up in the colon. Conditions like colon polyps, diverticular disease, or other issues in the large intestine can cause this type of bleeding.
Black or Tarry Stool
Black, sticky stools usually point to bleeding from the upper digestive tract, such as your stomach or small intestine. They can appear shiny or sticky and are sometimes caused by stomach ulcers, gastritis, or bleeding from the small bowel.
Keep in mind that iron supplements or medications containing bismuth can also darken your stool, so make sure to mention any medications you’re taking when discussing symptoms.
Blood Mixed Into Stool
If the blood is blended throughout the stool rather than just coating it or appearing on toilet paper, it often signals bleeding from the colon or rectum. This can happen with conditions like colitis, polyps, or other large bowel issues.
When Should You See a Doctor for Blood in Stool?
You should get prompt medical attention if you notice certain warning signs.
Bleeding That Happens Repeatedly
If you notice blood in your stool more than once, don’t ignore it—even small amounts matter. Repeated bleeding signals that something in your digestive tract needs attention, and acting early can prevent complications.
Large Amounts of Blood
A sudden rush of blood in your stool is a clear warning sign. If this happens, you should treat it as urgent and seek immediate evaluation to prevent potentially serious complications.
Other Symptoms That Occur With Rectal Bleeding
Blood in your stool often doesn’t appear alone. You may notice abdominal pain, cramping, or discomfort in your lower digestive tract, as well as changes in bowel habits like constipation or diarrhoea.
Unexplained weight loss or fatigue, weakness, or lightheadedness can also accompany bleeding, signalling that your body may be losing more blood than usual.
Higher Risk Due to Age or Family History
People over 50 or those with a family history of colorectal conditions should be especially vigilant and not ignore rectal bleeding.
Seeing blood in your stool or experiencing other concerning symptoms? Dr Bernard Lim can help pinpoint the cause and guide you through the right treatment, from colonoscopy to targeted interventions. Contact us today.
When a Colonoscopy Screening May Be Recommended
A colonoscopy is usually what’s ordered by a doctor if you face any of the symptoms above. It allows a direct view of your colon and rectum, helping your doctor to spot any unusual changes.
During the procedure, your doctor can detect growths like polyps, signs of cancer, inflammation and other structural abnormalities.
In many cases, minor issues—such as small polyps—can be removed or treated immediately, meaning the procedure is not just diagnostic but also therapeutic, helping prevent more serious problems later.
What Happens After a Colonoscopy Screening in Singapore?
After your colonoscopy, your doctor will discuss the findings with you and outline any further treatment or monitoring that may be needed. Recovery from a colonoscopy is typically straightforward, and most people can return to their usual activities within a day.
Your doctor will provide guidelines on when to resume eating, drinking and taking any regular medications, as well as share tips for managing any discomfort or bloating.
Don’t Ignore Persistent Blood in Stool
Even a small amount of blood in your stool can signal a serious issue, so you shouldn’t wait to seek medical evaluation.
In Singapore, Dr Bernard Lim can assess your symptoms, perform colonoscopy screening if needed, and guide you through a clear, personalised treatment plan—whether it’s lifestyle changes, medication, monitoring, or surgical intervention. Contact us today.
