We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission Here’s our process.

Medical News Today only shows you brands and products that we stand behind.

Our team thoroughly researches and evaluates the recommendations we make on our site. To establish that the product manufacturers addressed safety and efficacy standards, we:
  • Evaluate ingredients and composition: Do they have the potential to cause harm?
  • Fact-check all health claims: Do they align with the current body of scientific evidence?
  • Assess the brand: Does it operate with integrity and adhere to industry best practices?
We do the research so you can find trusted products for your health and wellness.
Was this helpful?

Burning diarrhea can cause severe discomfort. Diarrhea may burn a person’s bottom if there is bile or stomach acid in the stool, they have eaten spicy foods, or there is physical trauma at the anus.

However, it is important to note that severe or long lasting diarrhea can cause malnutrition and severe dehydration. Without treatment, dehydration can be fatal.

If a person experiences burning diarrhea that lasts for longer than 2 or 3 days or is extremely painful or bloody, they should seek medical attention.

This article defines burning diarrhea and explains its causes, as well as how to manage it.

a person on the toilet because they have burning diarrheaShare on Pinterest
Spicy foods are a possible cause of burning diarrhea.

Diarrhea occurs when the intestines do not absorb enough fluid from the body’s waste. This means that stools will contain the surplus fluids and a person may experience loose, fluid-filled stools — with or without rectal pain — three or more times every day.

Sometimes, especially in intense or chronic cases, diarrhea can cause a painful, burning sensation in the rectum and anus.

There are several reasons that a person may experience burning diarrhea.

The following sections will discuss these potential causes in more detail.

Stomach acids, digestive enzymes, and bile

When food enters the stomach, acids and digestive enzymes attach themselves to it and begin breaking it down.

The digestive system adds bile to food when it passes through the small intestine. By the time food passes through, these acids and enzymes should no longer be acidic.

Diarrhea speeds up the digestion process, so foods often do not break down fully. This means that stomach acids, digestive enzymes, and bile may still be present in diarrhea. These can damage the tissues and cause a burning sensation in the rectum during or after a bowel movement.

Physical trauma

Foods may not entirely break down when they leave the body. For this reason, large, rough foods and those with edible seeds, pods, or shells may rub, cut, or cause small tears in the delicate tissues of the rectum.

Occasionally, simply wiping harder or more often after passing a stool is enough to increase irritation and contribute to burning diarrhea.

Spicy foods

Some spices contain chemical compounds that cause a warm, burning sensation upon contact with bodily tissues.

Capsaicin, the main active ingredient in most spicy foods, also features in over-the-counter (OTC) numbing products.

Capsaicin can irritate digestive tissues, triggering diarrhea. As diarrhea speeds up the digestive processes, the capsaicin from spicy foods may also leave the body before breaking down, causing a burning sensation as stools pass.

Other causes

Some other common causes of burning diarrhea include:

  • excess alcohol consumption
  • stress
  • caffeine
  • artificial sweeteners
  • fructose, a naturally occurring sugar present in fruits
  • laxative abuse

There are a number of health conditions that can increase the risk of burning diarrhea.

The following sections will discuss these in more detail.

Irritable bowel syndrome and other gastrointestinal conditions

Diarrhea is a common symptom of irritable bowel syndrome (IBS). For people with IBS, diarrhea can be chronic. People may also experience frequent bouts of constipation.

According to the International Foundation for Gastrointestinal Disorders, people with IBS with diarrhea experience an average of 200 episodes of gas and diarrhea per year.

Other gastrointestinal conditions that could cause chronic diarrhea include:


Hemorrhoids are swollen veins in the lower rectum or around the anus.

Episodes of diarrhea can increase irritation and swelling of hemorrhoids, which can then cause a burning, painful sensation.


Diarrhea is a known side effect of metformin, which is a medication that people use for managing type 2 diabetes.

According to a 2016 review, around 10% of people who take metformin experience side effects in the gastrointestinal system. Diarrhea is among these adverse effects.

Learn more about the connection between diabetes and diarrhea here.

Food allergies or intolerances

When the small intestine senses a compound or substance that it is allergic to, it sparks an exaggerated immune response.

One response is diarrhea. The immune system triggers the digestive system to remove the irritant as quickly as possible.

Learn more about food allergies here.

Food poisoning

Nearly all types of food poisoning cause diarrhea.

Cases of food poisoning may last for several days, weeks, or even months. Extended bouts of food poisoning can increase the chances of irritation from more frequent wiping.

Most types of bacterial and parasitic infections require medical treatment.


Antibiotics may cause diarrhea by disturbing the natural balance of microbes in the gut. This might allow bacterial overgrowth or infection by bacteria that produce toxins.

Cases of antibiotic-associated diarrhea may require medical treatment.

Learn which foods to eat alongside antibiotics here.

Surgery or medical therapies

According to the American Cancer Society, radiation therapy, chemotherapy, and several other cancer treatments can all cause diarrhea. Tumor growth itself can also cause this symptom.

Diarrhea that occurs due to cancer therapy can last for up to 3 weeks after the end of treatment.

Surgeries involving the gastrointestinal system may also cause diarrhea as an adverse effect.

For bothersome, intense, or chronic cases of burning diarrhea, several at-home remedies may help a person reduce the symptoms without dramatically interfering with immunity.

Diarrhea usually causes fluid loss, so increasing fluid intake can help prevent dehydration.

It may be helpful to drink more water during periods of diarrhea, but it is also important to replace salt and sugars with alternatives, such as saltines and diluted juice.

One alternative is an oral rehydration solution that contains electrolytes. These products can help a person rehydrate after severe diarrhea.

A person should also try to consume bland foods — such as toast, rice, and bananas — if they are experiencing symptoms of diarrhea. Dense carbohydrates can help make stools more solid.

Eating probiotic yogurt may also help by restoring the natural balance of gastrointestinal flora, or microbes, after diarrhea.

A person with burning diarrhea should also:

  • Avoid spicy foods and any food known allergens.
  • Be as gentle as possible when wiping.
  • Wash the area with lukewarm water and unscented baby wipes.
  • Sit in a warm bath with Epsom salts.
  • Avoid dehydrating foods and substances, such as caffeine and alcohol.
  • Avoid tobacco.
  • Apply a water repellent cream or ointment to the affected area.
  • Avoid foods high in sugar or fat.
  • Use OTC hemorrhoid creams.
  • Use OTC pain medication.
  • Take probiotic supplements.

Most cases of burning diarrhea will resolve without treatment after a day or two. However, longer or more intense episodes of diarrhea can sometimes be a symptom of a more significant health condition.

Some reasons to seek medical attention for burning diarrhea include:

  • diarrhea that does not resolve without treatment within 2 days
  • extremely painful diarrhea
  • blood in the stool
  • black stool
  • diarrhea due to an antibiotic or new medication
  • diarrhea that smells unusual
  • fever, chills, or night sweats
  • a rash
  • severe dehydration, including extreme thirst, exhaustion, lightheadedness, and dark colored urine
  • significant weight loss and a lack of appetite
  • vomiting
  • recent travel

Some of these home remedies are available for purchase online.