Can Eating Poop Make You Sick?

Yes, eating poop can make you sick. Human feces can carry bacteria, viruses, and parasites that cause diarrhea, vomiting, fever, and in rare cases, serious infections. The risk depends on whose stool it is, how much was swallowed, and whether that person carries an infectious germ at the time.

This is not a hypothetical question. It comes up with toddlers who explore their diapers, with adults who handle sewage or care for someone who is incontinent, and with a small number of people who eat feces on purpose. There is also a real medical procedure that puts stool into the body — but it does not go through the mouth, and that distinction matters.

What Actually Lives in Human Feces?

Feces is roughly three-quarters water. The rest is a mix of undigested food, fiber, dead cells, and a massive population of bacteria. A large share of the dry weight of stool is bacteria, and the human gut holds trillions of them.

Most of those bacteria are normal gut residents that live in the colon and cause no harm there. The problem is location. Germs that are harmless in the colon can cause illness when they enter the mouth and travel through the digestive tract, or when they reach the bloodstream.

Stool can also carry pathogens — organisms that cause disease. These include bacteria such as Salmonella, Shigella, E. coli, and Campylobacter. It can carry viruses, including norovirus, rotavirus, hepatitis A, and hepatitis E. It can carry parasites such as Giardia, Cryptosporidium, and Entamoeba histolytica. Some of these have an extremely low infectious dose, meaning even a tiny amount can make a person sick.

A key point that surprises many people: a person can shed these germs in their stool while feeling completely fine. No symptoms does not mean no risk.

Can Eating Poop Make You Sick?

Swallowing feces is a recognized route of infection. This is called the fecal-oral route, and it is one of the most common ways that intestinal infections spread worldwide.

When contaminated stool enters the mouth, pathogens can survive the trip through the stomach and set up infection in the intestines. The result is usually gastroenteritis — inflammation of the stomach and intestines. Typical symptoms include diarrhea, nausea, vomiting, stomach cramps, and sometimes fever. Most healthy adults recover on their own within several days, but some infections can be severe or last much longer.

Certain germs are more dangerous than others. E. coli O157:H7, for example, can cause bloody diarrhea and, in a small percentage of cases, a serious complication involving kidney failure. Shigella is highly contagious — a very small number of organisms can cause illness. Hepatitis A can cause liver inflammation that lasts weeks to months.

People with weakened immune systems face higher risk. So do infants, older adults, and pregnant women, whose bodies may handle infections differently. For these groups, an infection that would be mild in a healthy adult can become serious.

Is There Ever a Medical Reason to Ingest Stool?

There is one legitimate medical use of stool, and it does not involve eating it. Fecal microbiota transplantation, or FMT, transfers stool from a screened healthy donor into a patient’s colon — usually through a colonoscope, an enema, or a tube placed into the digestive tract. It is used to treat recurrent Clostridioides difficile infection, a serious and hard-to-treat bacterial infection of the colon.

The donor stool is tested extensively for infectious organisms before use. This is the opposite of eating untested stool. The material is placed directly into the lower digestive tract, bypassing the mouth and stomach entirely, and it is delivered under medical supervision.

FMT is not a general wellness treatment. It is a specific procedure for a specific condition, and it carries its own risks, including the possibility of transmitting an infection if screening is incomplete. Some clinics market stool-derived products for other conditions, but the evidence for those uses is much weaker. FMT should not be confused with eating feces, and it is not something to attempt at home.

How Do People Actually Get Exposed to Feces?

Most people who get sick from fecal germs never eat poop on purpose. Exposure happens in ordinary ways.

• Changing a diaper and then touching your mouth or food before washing your hands
• Handling raw meat or produce contaminated with animal or human waste
• Drinking water from a contaminated well, stream, or pool
• Swimming in lakes, rivers, or pools where someone has had diarrhea
• Caring for a person with diarrhea and not washing hands thoroughly
• Touching surfaces in bathrooms, daycares, or hospitals and then touching your face

Children are a common source of transmission because they may not wash hands well and because they put their hands and objects in their mouths. Daycares and schools see this often.

There is also a specific behavior called coprophagia — eating feces — which occurs in some people with certain psychiatric or developmental conditions, and in some cases of dementia. It also occurs in some animals, which is a separate matter. In humans, when it happens, it warrants medical and often psychological evaluation rather than judgment.

What Should You Do If You Swallow Feces?

If a small amount was swallowed accidentally, such as during a diaper change, the risk is usually low but not zero. Wash your hands and mouth out with water. Watch for symptoms over the next several days.

Seek medical care if any of the following occur:

• Bloody diarrhea
• Severe stomach pain
• High fever
• Signs of dehydration, such as dizziness, very dark urine, or not urinating much
• Symptoms that last more than a few days or keep getting worse

If a child swallows a larger amount, or if you are unsure how much was swallowed, contact a poison control center or a healthcare provider. Do not wait for symptoms to decide.

For people with weakened immune systems, infants, and pregnant women, it is reasonable to contact a provider even after a small exposure, because the threshold for concern is lower.

How Do You Prevent Fecal-Oral Illness?

Handwashing is the single most effective step. Wash with soap and water for at least 20 seconds after using the bathroom, after changing diapers, before preparing food, and before eating. Hand sanitizer helps but does not work well against all germs, including norovirus, so soap and water is preferred when hands are visibly soiled.

Other practical steps:

• Wash raw fruits and vegetables before eating them
• Cook meat to safe internal temperatures
• Avoid drinking untreated water from streams, lakes, or unknown wells
• Do not swim or let children swim if they have diarrhea
• Clean bathroom surfaces and diaper-changing areas regularly
• Keep raw meat separate from ready-to-eat foods

These steps matter because the fecal-oral route is how many common infections spread. Most of them are preventable with basic hygiene.

Does Eating Poop Have Any Health Benefits?

No. There is no established health benefit to eating feces. Claims that it boosts immunity, balances gut bacteria, or treats disease are not supported by clinical evidence.

The gut microbiome is a real and active area of research. Scientists study how gut bacteria affect digestion, immunity, and other body systems. But that research does not translate into eating stool as a health practice. The bacteria in feces are not a supplement. They are a mix that includes potential pathogens, and swallowing them introduces risk without a demonstrated benefit.

The one medical use of donor stool — FMT — is a controlled procedure for a specific infection, not a general health strategy. It is delivered by clinicians, screened for safety, and placed in the colon, not the mouth.