Why is there blood in your stool

Blood in stool is not common. If you ever happen to see blood in your stool or have some weird pain while passing bowels, it is not normal and should not be avoided. There can be several reasons for blood in the stool.

Blood can be there in the stool because of constipation, anal diseases, anal cancer, colon cancer, irritation in the anus, hemorrhoids, etc. Whatever the reason may be, consult a doctor. 

Avoiding such serious symptoms may further make the disease worse. Stool in the blood is also called rectal bleeding. In some cases, the stool may also appear to be black or any dark color. Or the blood had already dried up and had given a dark or red color to the stool.

Problems due to rectal bleeding

15 reasons for cause of blood in stool

Rectal Bleeding or hematochezia is a condition in which the patient sees blood in stool. Rectal bleeding can also be a symptom of some serious disease. Common reasons behind blood in stool are listed below.

  1. Anal Fissure

    Anal fissure is a small cut or tear in or around the anus and the anal opening. It leads to painful bowel passage and blood in the stool.

  2. Piles or Hemorrhoids:

    Blood vessels in the anus and towards the anal opening swell up due to prolonged hours of constantly sitting on hard chairs. This causes pain and itching in and around the anus and anal opening. It causes painful bowel movements and blood is very often seen in the stool. (Also read: Know Everything about Piles treatment)

  3. Diverticulosis:

    It is a condition in which small pouches or diverticula have formed around the walls of the large intestine that causes bleeding. This blood further passes out of the body with stool.

  4. Polyps:

    Polyps is a cancerous condition rise from hemorrhoids in a serious case. This causes the stool to change color to blackish red. Blood streaks appear as red streak lines on the stool which makes the stool look blackish red.

  5. Colon Cancer:

    Colon cancer is a rare type of cancer that initially starts in the large intestine. Common symptoms of colon cancer include blood in the stool, fatigue, weight loss, constipation or diarrhea, dark or black colored stool, etc.

  6. Food Poisoning:

    When you eat stale food or drink contaminated water, you may get food poisoning. These foodborne bacteria can cause blood in stool. Get your stool sample tested to know the type of bacteria you are exposed to.

  7. IBD [Inflammatory Bowel Disease]:

    Another problem that can cause blood in stool is IBD. It is inflammation in the bowels. Symptoms of IBD vary depending on the location and severity of inflammation, If it is diarrhea, it occurs when affected parts of the bowel can’t reabsorb water. In case of bleeding ulcers, there may be blood in the stool, stomach pain, cramping, and bloating due to bowel obstruction.

  8. Crohn’s disease:

    It is one of the most common types of IBD. Crohn’s disease causes inflammation of the digestive tract lining and can lead to severe diarrhea and abdominal pain. The inflammation can lead to blood in stool. 

  9. Gastroenteritis:

    Gastroenteritis is a common bacterial infection that causes diarrhea and vomiting. The tummy bug affects people of all ages but is most common in young children. It can be really unpleasant but normally clears up on its own in a couple of days. The illness can cause inflammation in the stomach and colon, making it more sensitive when doing a poo. This can cause spots of blood to appear in your stools. 

  10. Peptic Ulcers:

    A peptic ulcer is an open sore in the lining of the stomach, upper end of the small intestine or duodenum caused by a bacterial infection. 

  11. Internal bleeding:

    If the blood in the stool is dark red, it can be a sign of internal bleeding. It could happen anywhere in your digestive system, from your stomach to your small and large intestines. such bleeding can be a sign of cancer, stomach ulcers or severe gastrointestinal disease. Consult a doctor if you notice dark red color blood in stool.

  12. Colitis:

    Colitis is a long-term condition in which rectum and colon get inflamed. Small ulcers develop in the lining of the bowel. These ulcers bleed and also get pus. The main symptom of colitis is chronic diarrhea and abdominal pain. People with colitis are also more likely to suffer other bowel conditions such as IBS (Irritable bowel syndrome) and Crohn’s disease.

  13. STIs [Sexually Transmitted Infections]:

    STIs can affect the bottom as well as the penis and vagina. Unprotected anal sex can spread STIs from person to person. Once infected it can cause inflammation of the lining of the anus, which can lead to bleeding and pus. You will need to see a doctor to diagnose the infection, after which you will be treated with either antibiotic, antiviral or antifungal medication depending on the type of infection you have.

  14. Prolapse:

    This can be something very serious when there is rectum prolapse. Prolapse means part of your rectum will protrude out through your bum. It can happen when while passing stool and can be quite discomforting. You may not be able to control your bowel if you have a prolapse. You may notice pain and blood in stool. Immediate medical intervention is important so contact a doctor as it will not heal on its own. 

  15. False Alarm:

    Sometimes, coloring from the food we eat like beetroot or red gelatin can turn your stool red. (Also read: Anatomy of colon and rectum)

The exact reason for the presence of blood in piles cannot be guessed verbally. The patient needs to be thoroughly examined by a professional medical adviser or a doctor in order to find out the exact reason behind it.

Also ReadHow do you know if you have piles?

pictorial representation of symptoms of blood in the stool

Get a cure for painful bowel movements and blood in stool

Rectal bleeding is among the majority of humans today. In most cases, rectal bleeding is just a symptom of some other disease such as piles, anal fistula, colon cancer, etc.

Therefore, it is strictly advised to the patients to not avoid signs such as painful bowel movements and blood in stool and consult a medical expert to the soonest. In most cases, blood in stool is a reason for piles and anal fissure.

Now, there is a pain and hassle-free treatment for anal fistula and piles. The laser surgery treatment provides a permanent cure for piles to the patient. The patient feels no pain during the surgery and after a bed rest of 12-24 hours, can also follow their normal daily routine. Even the chances of complications are negligible. 

Also ReadWhen Piles Need Surgery

Also Read: Yoga Poses & Exercises to Cure Piles

Pristyn Care Provides Best Piles Treatment in:


Is blood in stool a sign of cancer?

Blood in stools may or may not be a sign of bowel cancer. Consult a general physician if you are worried about the symptoms. Usually, blood in stools can be because of piles or fissure.

Is blood in stool dangerous?

Blood in stool can be harmless, it can be discomforting in case of piles, fissure, straining during bowel movements or can be a serious problem of bowel cancer.

What are the symptoms of stage 1 colon caner?

The common symptoms may be: - Constipation - Diarrhea - Changes in bowel habits or constipation - Rectal bleeding or blood in the stool - Abdominal bloating, cramps or discomfort - A feeling that the bowel doesn't empty completely

Can dehydration cause blood in stool?

Blood in stool can be due to long-term constipation or diarrhea. There is straining during bowel movement which may cause blood in stool. Dehydration or low fiber intake can cause constipation. So, yes, dehydration may cause blood in stool.

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