Not Medical Advice: The products of bacterial action are the cause of different stool smells. You may have a high concentration of a compound called "mercaptans." This compound is what causes the stool to smell like burnt rubber.
According to Healthline, a change in your diet is often the reason for foul-smelling stools; malabsorption is another common cause. Malabsorption occurs when your body is unable to absorb the proper amount of nutrients from the food you eat. This generally occurs when there is an intestinal infection or an intestinal disease that prevents your intestines from absorbing nutrients from your food.
Common causes of malabsorption are:
Inflammatory bowel disease
Dairy protein and other food allergies
If you have inflammatory bowel disease, also known as IBD, eating certain foods will cause your intestines to become inflamed. People with IBD often complain of foul-smelling diarrhea or constipation. Affected individuals also have flatulence after eating certain foods. This flatulence may have a foul smell.
Infections that affect the intestines may also cause foul-smelling stools. One infection called gastroenteritis occurs after ingesting food that has been contaminated with E. coli and Salmonella, as well as certain other viruses, bacteria, or parasites.
Learn more information about foul smelling stool here.
Discover 11 Icky But Interesting Facts About Poop at Everyday Health.
Check out some tips on how to improve the smell of your stinky poop at Digestivehealthguide.com.