Stinkier-than-usual farts typically happen because of the foods you eat. You may experience more gas if you have constipation or if youre taking certain medications.
Flatulence, which is sometimes called passing wind, passing gas, or farting, is a biological process that helps to release gas from digestion.
In some cases, theyre silent and odorless, but farts can become uncomfortable when theyre loud and foul-smelling.
Smelly gas is not uncommon and is often considered normal. Some foods or medications can cause excessively smelly farts.
There are, however, some instances when smelly farts can be an indicator of an underlying infection, digestive issues, or a disorder.
6 causes of smell fartsThere are a number of reasons why your farts may smell bad. In most cases, foul-smelling flatulence is associated with the foods you eat and an unbalanced diet.
However, there can be more serious causes of rotten-smelling gas.
- High fiber foods Many high fiber foods can cause you to pass more gas. It takes longer for these foods to break down in your digestive system, so they ferment over time.
High fiber foods also sometimes smell, which means your farts may smell, too. This is especially true with strong-smelling vegetables, such as:
broccoli bok choy asparagus cabbage Your gas may smell like rotten eggs because of the sulfur in fiber-rich foods. Sulfur is a natural compound that smells like spoiled eggs. Many vegetables are sulfur-based.
If this is causing your flatulence, simply modifying your diet could be enough to reduce it.
- Food intolerance
If you have a sensitivity or reaction to certain foods, your gas could have a foul odor. For example, people with lactose intolerance cant break down the sugar lactose. As a result, its fermented by bacteria in the gut.
Gluten-related disorders, including celiac disease, can also cause smelly farts. Celiac disease is an autoimmune disease where there is an immune response to the protein gluten. This leads to inflammation and injury in the intestine, leading to malabsorption and flatulence.
Other than bad-smelling flatulence, celiac disease can cause other symptoms:
fatigue bloating diarrhea weight loss Talk with your doctor to get tests and determine whether you have any food allergies or sensitivities that may be making your farts smell.
- Medication
Although uncommon, certain medications can cause smelly flatulence.
Antibiotics kill off harmful pathogens in the body, but they can also destroy some of the good bacteria in your stomach, which aids digestion. Without this bacteria, your gas may smell. You could also experience bloating and constipation.
Treatment for this cause involves changing medication, which you should only do under the direction of a healthcare professional.
- Constipation
Constipation indicates that you have a buildup of stool, or poop, in your colon. If you cant poop regularly, it can cause bacteria and odor to develop. The end result is foul-smelling and sometimes painful gas.
Taking over-the-counter laxatives can be a simple home remedy for constipation.
- Bacteria buildup and digestive tract infections When your body digests food, it extracts nutrients and sends them to the bloodstream. The waste products are sent to the colon. Disrupting the digestion process can cause an overgrowth of bacteria.
Some bacteria can cause infection in the intestines and digestive tract. This may cause a higher volume of gas than normal and a strong-smelling odor. People with digestive tract infections also often have abdominal pain and diarrhea.
Visit your doctor to determine you have a bacterial infection. If you do, theyll prescribe antibiotics to clear the infection and get you feeling better.
- Colon cancer
A more rare cause of smelly farts is colon cancer. When polyps or tumors form in the digestive tract, it can cause a partial bowel obstruction, which results in gas buildup and bloating.
If you begin to experience abnormal smelling gas and discomfort, and a change in diet or medication doesnt affect your symptoms, call your doctor for full evaluation. They can determine whether a colonoscopy is warranted.
Treatment for colon cancer varies based on the stage of cancer. It can include surgery to remove tumors and chemotherapy to kill cancer cells.