Signs of Rectal Bleeding That Might Indicate Cancer – When to See a Doctor

Seeing blood in your stool or on toilet paper can be alarming. Often this is something simple like haemorrhoids, but it could point to colorectal cancer, with over 40,000 new cases yearly in India. Catching cancer is very crucial and can increase survival rates to 90% for early-stage cases. At Amerix Cancer Hospital, we’re here with a warm heart to guide individuals through rectal bleeding signs and when to seek a doctor’s advice.

Spotting cancer early is a daunting task, but the earlier you are detected, the better it is for your recovery. Not every drop of blood means cancer, but certain clues shouldn’t be ignored. Our expert oncologists are ready to offer one-to-one discussions, offering family support to keep you steady. Let’s dive into what causes rectal bleeding, signs that might signal cancer, and when to get help to catch trouble fast.

What Causes Rectal Bleeding?

Rectal bleeding can be from a range of issues, from minor injuries to serious conditions like colorectal cancer, making it crucial for individuals in India to understand the possibilities. Most causes are benign, but overlooking a dangerous one can worsen the situation. At Amerix, we’re breaking down the common and concerning causes to keep you informed:

  • Hemorrhoids: Swollen veins in the rectum or anus cause bright red blood on toilet paper often with itching or pain. They account for most of the bleeding cases and usually resolve with diet or creams.
  • Anal Fissures: Small tears in the anal lining produce bright red blood and sharp pain during bowel movements. They heal quickly with fibre or ointments, affecting some of the bleeding cases.
  • Colorectal Cancer: Tumors in the colon or rectum can cause dark red or maroon blood, often mixed with stool, as seen in some of the diagnoses. Persistent bleeding with other symptoms can raise concern for a serious conditions.
  • Inflammatory Bowel Disease (IBD): Crohn’s or ulcerative colitis leads to bloody diarrhoea, mucus, and cramps, common in India’s urban areas due to stress and diet.
  • Diverticulosis: Pouches in the colon bleed, causing maroon or bright red blood, often painless, affecting older adults but stops in most of cases with minimal medical care.

Knowing these causes helps you gauge when bleeding needs a doctor’s eye. Our team’s here with discussions to sort out what’s behind it.

How to Recognize When Rectal Bleeding Might Indicate Cancer

Not all rectal bleeding is a sign of cancer, but specific signs can point to colorectal cancer, especially in India, where late diagnoses hit 60% of cases. Recognizing these clues helps individuals act fast, particularly in high-risk groups. At Amerix, we’re highlighting patterns that might suggest cancer, so you stay safe:

  • Color of Blood: Dark red or maroon blood, often mixed with stool or mucus, suggests bleeding from the colon, a known sign that something serious might be wrong. Bright red blood typically points to minor rectal issues like haemorrhoids.
  • Consistency and Clots: Blood with mucus, clots, or a tarry appearance (melena) can indicate a tumor, seen in 25% of colorectal cancer patients at diagnosis.
  • Frequency and Persistence: Bleeding that’s ongoing or recurs over two weeks, even in small amounts, is more likely cancer-related than one-time episodes from fissures.
  • Abdominal Pain: Cramping, bloating, or persistent discomfort alongside bleeding, reported by 35% of early-stage patients, raises red flags.
  • Bowel Changes and Weight Loss: Bleeding with diarrhoea, constipation, incomplete emptying, or unexplained weight loss (5% body weight loss) for weeks suggests cancer.

These signs, especially when combined, need attention.

When to See a Doctor

Deciding when rectal bleeding needs medical attention can be a lifesaver, as early colorectal cancer detection boosts survival odds. In India, where access to care varies, knowing when to act is key. At Amerix, we’re sharing clear guidelines for individuals to seek help and understand screenings:

  • Persistent or Severe Bleeding: Bleeding lasting over two weeks, heavy, or dark/clotty needs immediate evaluation, as it’s linked to cancer in 20% of cases.
  • Accompanying Symptoms: See a doctor if bleeding comes with weight loss, fatigue, abdominal pain, or bowel habit changes, signalling possible cancer or IBD.
  • High-Risk Individuals: Those over 45, with a family history of colorectal cancer, or conditions like IBD, should seek care for any bleeding, even mild.
  • Screening for High-Risk Groups: Family history doubles risk, so start screening at 40 or 10 years before a relative’s diagnosis. Lifestyle risks (smoking, obesity) also necessitate earlier checks.
  • What to Expect: A doctor may do a digital rectal exam, order a fecal immunochemical test (FIT, 80% cancer detection), or recommend sigmoidoscopy. Colonoscopy often follows for confirmation.

The Importance of Early Diagnosis

Catching colorectal cancer early can transform outcomes, with Stage 1 offering a 90% 5-year survival rate compared to 14% for Stage 4. In India, where 60% of cases are diagnosed late, early action is critical. At Amerix, we’re emphasizing why early diagnosis matters and how it’s done:

  • Improved Outcomes: Early detection allows surgery or polypectomy, curing 70-90% of Stage 1 cases. Advanced cancers need complex treatments like chemotherapy, with lower success.
  • Colonoscopy: This gold-standard test views the colon, spotting tumors or polyps in most cases. It’s done under sedation, taking 30-60 minutes, and removes polyps on the spot.
  • Biopsies: If a suspicious growth is found, a tissue sample is taken during colonoscopy and checked for cancer cells, confirming the diagnosis with high accuracy.
  • Stool Tests: FIT detects hidden blood (high sensitivity for cancer), used for screening or initial checks, especially in rural India with limited colonoscopy access.
  • Blood Tests: Carcinoembryonic antigen (CEA) markers or anaemia checks support diagnosis, though less specific, used in many cases to assess spread.

Early diagnosis saves lives, and our oncologists are determined to guide you to a speedy recovery and a better life.

Conclusion

Rectal bleeding might be nothing serious, but signs like dark blood or persistent symptoms could point to colorectal cancer, and acting early can make a big difference for individuals in India. At Amerix Cancer Hospital, we’re motivating you to listen to your body, track changes, and seek an expert oncologist’s advice if something feels off. Don’t let worry hold you back—get checked to catch trouble. 

In case of any doubts, call now to book an appointment with an expert Oncologist at Amerix Cancer Hospital. We’ve got your back!

People Also Ask

How do I know if rectal bleeding is serious or just from haemorrhoids?

Haemorrhoids cause bright red blood, often with itching, resolving in days, while serious bleeding is dark, persistent, or paired with weight loss or bowel changes. Cancer-related bleeding may include mucus or clots. Ongoing symptoms need a doctor’s check. Tests like FIT or colonoscopy can clarify the cause.

What are the first signs of rectal cancer that I should be aware of?

Early signs include dark or maroon blood in stool, persistent bleeding, abdominal cramps, or changes in bowel habits like diarrhoea or constipation. Unexplained weight loss or fatigue may also occur. A doctor’s evaluation is key for early detection.


Can rectal bleeding always indicate cancer?

No, rectal bleeding is often benign, with 60% caused by haemorrhoids, 10-15% by fissures, or others like diverticulosis. Cancer accounts for 20% of cases, typically with dark, persistent blood and other symptoms. Most bleeding isn’t cancer, but ongoing issues need checking. Tests are always prescribed to confirm the cause.

How can I prevent rectal bleeding and cancer?

Eat a high-fibre diet, stay hydrated, and avoid smoking or excessive alcohol to reduce bleeding and cancer risk. Regular screenings (FIT, colonoscopy) after 45 or earlier, with a family history catch issues early. Exercise and maintaining a healthy weight lower the risk. Consult a doctor for tailored plans.

When should I see a doctor for rectal bleeding?

See a doctor if bleeding lasts over two weeks, is dark or heavy, or comes with weight loss, pain, or bowel changes. High-risk individuals (over 45, family history) should act on any bleeding. Even one worrisome episode needs evaluation. Tests like colonoscopy ensure clarity.

References:

https://my.clevelandclinic.org/health/symptoms/14612-rectal-bleeding

https://www.hopkinsmedicine.org/health/conditions-and-diseases/colon-cancer/colon-cancer-symptoms

https://www.mayoclinic.org/diseases-conditions/rectal-cancer/symptoms-causes/syc-20352884

https://www.mdanderson.org/cancerwise/when-to-worry-about-blood-in-your-stool.h00-159545268.html

https://www.cancer.org/cancer/types/colon-rectal-cancer/detection-diagnosis-staging/signs-and-symptoms.html

https://www.healthdirect.gov.au/rectal-bleeding

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