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what can cause bloody diarrhea

by Melissa Crist DVM Published 3 years ago Updated 3 years ago

What Causes Blood in Diarrhea?

  • Infection. Bloody diarrhea due to infection may be caused by the following. ...
  • Serious non-infectious conditions. Serious conditions that can result in bloody diarrhea include the following. ...
  • Anal and rectal causes of bloody diarrhea. ...

Full Answer

What causes sudden onset of bloody diarrhea?

What Causes Bloody Diarrhea?

  1. Bacterial infection. A stomach bug can be caused by bacteria. ...
  2. Hemorrhoids. Bloody diarrhea doesn’t necessarily indicate an emergency! ...
  3. Inflammatory bowel disease. Inflammatory bowel disease (IBD) is inflammation of the bowel. ...
  4. Intestinal ischemia. Ischemia occurs when blood flow is low. ...
  5. Colorectal cancer. ...
  6. Parasite infections. ...

What are the most common causes for diarrhea?

Other causes include:

  • Alcohol abuse
  • Allergies to certain foods
  • Diabetes
  • Diseases of the intestines (such as Crohn's disease or ulcerative colitis)
  • Eating foods that upset the digestive system
  • Infection by bacteria (the cause of most types of food poisoning) or other organisms
  • Laxative abuse
  • Medications
  • Overactive thyroid (hyperthyroidism)
  • Radiation therapy

More items...

What are the most common reasons for blood in stool?

These 6 Medical Conditions Are Common Culprits

  • Hemorrhoids. Hemorrhoids are one of the most common reasons you'll see blood in your stool and, luckily, they're benign.
  • Anal fissures. Fissures are small cuts that happen at the anus. ...
  • Inflammation. ...
  • Infection. ...
  • Colorectal cancer. ...
  • Ulcerations. ...

Why you might be getting diarrhea after eating?

  • Alcoholic beverages: In India, people use juice and pulp to make a fermented drink called feni. ...
  • Vinegar: Apples are an excellent choice for making vinegar, which works well for marinating and pickling.
  • Jam and syrup: People use the fruit's pulp and juice to make jams, spreads and syrups. ...

More items...

Is bloody diarrhea an emergency?

Acute bloody diarrhea is a medical emergency, because it often signifies disorders that are life threatening and have urgent epidemic control implications in the community. Even if bloody diarrhea is not infectious in origin, it could represent illnesses that warrant expeditious diagnosis and treatment.

What does diarrhea with blood mean?

Bloody diarrhea is a potentially critical condition in which there is blood mixed in with loose, watery stools. The blood can arise from anywhere along your digestive tract, from the mouth to the anus. Bloody diarrhea is often a sign of gastrointestinal bleeding due to injury or disease.

What disease causes bloody diarrhea?

Chronic bloody diarrhea may be due to inflammatory bowel disease (IBD), which is ulcerative colitis or Crohn's disease. Other less common causes include ischemia of the gut, infections, radiation therapy and colon cancer or polyps. Infections leading to chronic diarrhea are uncommon, with the exception of parasites.

When should I see a doctor for bloody diarrhea?

If you are experiencing bloody stools or bleeding from a bowel movement, you may need to see a doctor. Seek immediate medical attention if you are experiencing fever, excessive weakness, vomiting, or seeing large amounts of blood in your stool.

What should I eat if I have bloody diarrhea?

BRAT stands for “bananas, rice, apples, toast.” These foods are bland, so they won't aggravate the digestive system. They're also binding, so they help firm up stool....Other foods that are included in the BRAT diet include:cooked cereal, like Cream of Wheat or farina.soda crackers.applesauce and apple juice.

Is red blood in stool serious?

Bright red blood in the stool typically indicates that there is bleeding in the rectum or colon, which may be a sign of colon or rectal cancer. Rectal bleeding can also be caused by hemorrhoids.

Can stomach virus cause bloody stool?

Gastroenteritis is an infection in the stomach or intestines caused by a virus or bacteria, such as norovirus or food poisoning. It can lead to bloody diarrhea. Nausea and vomiting may also be present.

What are the first signs of E coli?

Early symptoms of E. coli O157:H7 infectionNausea.Vomiting.Stomach cramps (abdominal pain)Diarrhea that often is bloody.Fever of about 100 F to 101 F (37.7 C to 38.3 C)Malaise.Loss of appetite.Mild dehydration.

Is bloody diarrhea an emergency?

Bloody diarrhea can be an emergency if it results from a serious condition, such as a serious intestinal infection or colon cancer. Although not al...

What should I eat if I have bloody diarrhea?

If you have bloody diarrhea and are unable to get immediate medical attention, eating soft, bland foods can help relieve your symptoms.

Can stress and anxiety cause bloody diarrhea?

Although stress and anxiety can cause diarrhea, blood in your diarrhea typically does not result from stress. The blood usually comes from an injur...

Hemorrhoids

Hemorrhoids are one of the most common reasons you'll see blood in your stool and, luckily, they're benign. Hemorrhoids are a normal cluster of blood vessels at the bottom of your rectum. "Everyone has them," Lisa Ganjhu, DO, a gastroenterologist at NYU Langone, tells Health.

Anal fissures

Fissures are small cuts that happen at the anus. "It's kind of like when you open your mouth really wide and you get little tears at the corners," Dr. Ganjhu says. When that happens, usually there's some pain and some bleeding. The same thing happens with anal fissures. "If you have a tear in your anus, that's painful," Dr. De Latour says.

Inflammation

Bloody diarrhea is often a symptom of Inflammatory Bowel Disease (IBD), which is an umbrella term for disorders that cause chronic inflammation in your digestive tract. Bleeding is more common with ulcerative colitis than Crohn's disease (the two main disorders under IBD), Dr. De Latour says.

Infection

Some GI infections can lead to bloody diarrhea, such as infectious colitis or even food poisoning, Dr. Ganjhu says. "E. coli and other bacteria cause an invasive infection so you get the inflammation and sloughing of tissues like with IBD that leads to bloody diarrhea," she says.

Colorectal cancer

The most feared cause of bloody diarrhea is cancer, specifically colorectal cancers, Dr. De Latour says. Although colorectal cancers were once thought to only happen in mid-life, doctors are now seeing younger and younger people diagnosed.

Ulcerations

Like with ulcerative colitis, ulcers from other disorders can cause bloody diarrhea. However, these types of ulcers are rare, Dr. De Latooour says. "It's called solitary rectal ulcer syndrome (SRUS). You get these big ulcers in the colon, especially in the rectum."

What causes bloody diarrhea?

A stomach bug can be caused by bacteria. Common bacterial infections that can cause bloody diarrhea include E. coli, Campylobacter, Salmonella, Shigella, and Clostridium difficile infection (C. diff). Bacterial infections may be contagious and can spread if an infected person does not wash their hands thoroughly.

Why does my stool look bloody?

In some cases, medications could be causing your stool to appear bloody. You should also call the doctor if you have more than one episode of bloody diarrhea, or the diarrhea is accompanied by: Abdominal pain. Nausea or vomiting. Fever.

What is the name of the cancer that affects the bowels?

Change in bowel habits, often including blood. Cancer of the colon (large intestine) or rectum is considered colorectal cancer. Colorectal cancer typically affects adults over age 50, but it can happen in younger adults. The cancers usually begin as small polyps that become cancerous over time.

How do you know if you have ischemia?

Symptoms. Sudden nausea and vomiting. Sudden bloody diarrhea. Sudden, severe abdominal pain. Ischemia occurs when blood flow is low. This happens when there is a blockage in one of the arteries in the abdomen that supplies your intestines with blood. This blockage could be plaque or a blood clot.

What is the treatment for IBD?

Treatment includes taking anti-inflammatory medications, such as topical or oral steroids, and immunologic medications that tamp down your immune system. In some cases, surgery may be needed. Once diagnosed with IBD, you will require regular check ups with your gastroenterologist (digestive disease doctor).

How to tell if blood is clumpy?

You should go to the ER if you have any of these signs, which can indicate a serious problem. Blood looks clumpy like coffee grounds or is dark and tarry. Blood seems to be filling the toilet or does not stop when you stand up. You’re experiencing intense abdominal pain.

Can IBD cause malnutrition?

Symptoms may develop gradually or occur suddenly. Untreated IBD causes inflammation throughout the digestive tract, which can lead to malnutrition, cancers, bleeding, and overall poor health. Managing the condition involves eliminating the inflammation with medication and diet.

Serious non-infectious conditions

Serious conditions that can result in bloody diarrhea include the following.

Anal and rectal causes of bloody diarrhea

Neither of these conditions are life-threatening, but both of these need medical care so you can feel better and not make these worse.

Food poisoning

Food poisoning, also called foodborne illness or "stomach flu," is an acute infection of the digestive tract from food contaminated with bacteria, viruses, parasites, or other toxins. It actually has no relation to influenza.

E. coli infection

E. coli are a large and diverse group of bacteria that can often be found in the intestines of healthy humans and animals. E. coli comes in a variety of strains. Although most strains are harmless, a few types can make people sick with diarrhea, as well as UTIs and respiratory illnesse...

Intestinal infection with ameba parasite

Visiting or living in places with poor sanitation can lead to parasite infections that can cause long-lasting diarrhea and stomach pain.

Diarrhea caused by a bacteria called vibrio

The Vibrio genus of bacteria causes nausea, vomiting, and diarrhea that can be very serious. Vibrio parahaemolyticus and Vibrio vulnificus are two of the species that cause this illness, which is also called vibriosis.

Campylobacter small intestine infection

Infection with the Campylobacter bacterium is one of the leading causes of acute diarrhea worldwide. The risk for this infection is increased in people with HIV/AIDS.

Why does bloody diarrhea last so long?

Bloody diarrhea can occur in all age groups and populations. Depending on the cause, it can last for a short time (acute) and disappear relatively quickly, such as when it is due to a gastrointestinal infection. Bloody diarrhea can also recur over a longer period of time (chronic), such as when it is due to inflammatory bowel disease.

What are the symptoms of bloody diarrhea?

Depending on the underlying disease, disorder or condition, bloody diarrhea may occur with other symptoms including: Abdominal pain or cramping. Abdominal swelling or bloating. Body aches. Fatigue. Fecal incontinence. Mucus or undigested food in feces. Nausea.

What does it mean when you have tarry diarrhea?

Black, tarry diarrhea usually indicates that the blood is coming from the upper gastrointestinal tract (esophagus, stomach and duodenum), while bright red or maroon-colored diarrhea often originates from bleeding in the lower gastrointestinal tract (colon, rectum and anus).

Why does my stool get watery?

The blood can arise from anywhere along your digestive tract, from the mouth to the anus. Bloody diarrhea is often a sign of gastrointestinal bleeding due to injury or disease.

Why does my child have bloody diarrhea?

In children, bloody diarrhea is most commonly due to a bacterial infection and inflammation in the lower gastrointestinal system. This is often linked to eating food contaminated with bacteria and parasites.

Can bloody diarrhea recur?

Bloody diarrhea can also recur over a longer period of time (chronic), such as when it is due to inflammatory bowel disease. Bloody diarrhea is a potentially life-threatening condition that should be evaluated in a medical setting.

6 Causes of Bloody Diarrhea, Red Diarrhea, Treatment

Bloody diarrhea occurs when there is blood hidden within loose, watery stools. Your digestive tract can produce blood anywhere along the way, from the mouth to the anus. The cause of bloody diarrhea may be gastrointestinal bleeding due to injury or illness.

1. Bacteria Infections

A bacteria infection in the digestive tract is one of the most common causes of diarrhea. Most often, the condition occurs in the small intestine, the colon, or both.

2. Inflammatory Bowel Disease (IBD)

IBD is a group of inflammatory disorders that affect the digestive tract. In most cases, the symptoms of IBD are diarrhea and constipation. IBD can manifest as:

3. Diverticular Disease

It is a condition where a small pouch of the intestinal wall becomes inflamed and develops a sack. It can become so enlarged that it bulges through the intestinal wall. The result is blood in the stool. The cause of this condition is unknown, but it can be associated with food allergies .

4. Hemorrhoids (Piles)

Hemorrhoids are swollen veins in the lower rectum. Bleeding from hemorrhoids can occur for several reasons. The most common causes of bleeding are constipation and lack of exercise. Bleeding can also be caused by taking certain medications or straining while having a bowel movement.

5. Gastroenteritis

Gastroenteritis is an infection of the intestines. If you have gastroenteritis, you may have bloody diarrhea or blood in your stools. This infection usually occurs due to a virus or bacteria and usually lasts for a few days. If you have gastroenteritis, it is vital to get treated as soon as possible.

6. Food Poisoning

Food poisoning is one of the most common causes of diarrhea. This condition can be caused by consuming contaminated food or drinking contaminated water. In most cases, it is not dangerous. However, some cases can be severe.

Why does my stool have blood in it?

Bloody stool can be caused by many things. Some of these causes are annoying yet pretty harmless like hemorrhoids or anal fissures; other causes are a lot more concerning—like cancer. If you or a loved one complains of blood in the stool, it's important that you/they see a physician.

What is the name of the disease that causes blood in the stool?

Diverticular Disease. There are two types of diverticular disease—diverticulosis and diverticulitis. 16  Both can present with pain and may result in blood in the stool. Diverticulosis occurs when pouches or diverticula (singular diverticulum) form in the colon.

Why do diverticula grow?

These diverticula grow out of weaknesses in the colonic wall and sometimes grow to several centimeters long. 17  Although classically attributed to a low-fiber diet, the exact cause of such diverticula is unknown. Bleeding from diverticula can be stopped during endoscopy or abdominal surgery.

What does blood in stool mean?

Blood in the stool typically presents as blood-red or maroonish and represents a bleed somewhere in the gastrointestinal (GI) tract from mouth to anus. If blood is coming from the upper GI tract and is being digested, it can also take on a black, tar-like appearance called melena. 1 .

What percentage of ischemic colitis is in the elderly?

Ischemic Colitis. Ninety percent of all cases of ischemic colitis are in the elderly. The condition can be acute or chronic. Ischemic injury results when intestinal blood flow to the colon is inadequate (think blood clot or atherosclerosis).

How to treat angiodysplasia?

Depending on location, angiodysplasia can be treated with endoscopic obliteration. Other treatments include hormone therapy, periodic blood transfusion, and iron supplements. 12  Fortunately, in most people, angiodysplasia stops on its own.

What causes a lower GI bleed?

As any surgeon can attest to, the most common cause of a lower GI bleed is an upper GI bleed. When you bleed copiously from an anatomical structure proximal to the ligament of Treitz, a ligament that suspends the distal duodenum, the blood can appear undigested in your stool (rapid transit). 2 

What is diarrhea caused by?

Bacteria and parasites. Contaminated food or water can transmit bacteria and parasites to your body. When traveling in developing countries, diarrhea caused by bacteria and parasites is often called traveler's diarrhea.

What causes diarrhea in children?

Rotavirus is a common cause of acute childhood diarrhea. The virus that causes coronavirus disease 2019 (COVID-19) has also been associated with gastrointestinal symptoms, including nausea, vomiting and diarrhea. Bacteria and parasites. Contaminated food or water can transmit bacteria and parasites to your body.

Why do people have difficulty digesting lactose?

People who have difficulty digesting lactose have diarrhea after eating dairy products. Lactose intolerance can increase with age because levels of the enzyme that helps digest lactose drop after childhood. Fructose.

Can gum cause diarrhea?

Sorbitol and mannitol — artificial sweeteners found in chewing gum and other sugar-free products — can cause di arrhea in some otherwise healthy people . Surgery. Abdominal or gallbladder removal surgeries can sometimes cause diarrhea. Other digestive disorders.

Can antibiotics cause diarrhea?

Many medications, such as antibiotics, can cause diarrhea. Antibiotics destroy both good and bad bacteria, which can disturb the natural balance of bacteria in your intestines. Other drugs that cause diarrhea are cancer drugs and antacids with magnesium. Lactose intolerance.

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What Causes Bloody Diarrhea in Cats?

The causes of bloody diarrhea in cats range from simple to very serious illnesses. Knowing the cause of your cat’s bloody diarrhea is very important as it is the first step in treating the problem. We’ve listed below the common causes of bloody diarrhea in cats:

Symptoms of Bloody Diarrhea in Cats

The defining sign of bloody diarrhea in cats is the presence of bright red or dark spots in the stool. Along with this, a cat can have other signs and symptoms, including:

How to Manage Bloody Diarrhea in Cats

If your cat has bloody diarrhea, seek immediate professional help. Call your vet as soon as you notice your cat has bloody diarrhea. Your vet will advise you on what to do next depending on your cat’s health and medical history.

Is Bloody Diarrhea in Cats an Emergency?

Yes, bloody diarrhea in cats is an emergency. Regardless of whether the bloody diarrhea is an isolated sign or the cat is showing other worrisome symptoms, you need to see the vet as soon as possible.

How do You Treat Bloody Diarrhea in Cats?

Since bloody diarrhea is only a sign your cat is not well, the treatment will depend largely on what is causing it. Some of the ways you can help the treatment of bloody diarrhea in cats include:

How is the Recovery for Bloody Diarrhea in Cats

The prognosis for bloody stools in a cat is usually a good one. In most cases, your cat will go home with you and continue treatment and care there.

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