Parents believed that increased drooling during the teething period causes diarrhea. The idea was that, during the teething period, babies swallowed the excess saliva, which interfered with the gastrointestinal system in a way that caused diarrhea. However, there's no scientific evidence to support this claim.

Is diarrhea associated with teething?

The common perception among dentists is that teething in babies and children may be accompanied by increased drooling, a slight rise in temperature, and perhaps increased irritability, but these symptoms are relatively minor. Teething and diarrhea are not usually associated.

Does teething make babies poop more?

The correlation between diarrhea and teething

So does teething cause diarrhea? Not exactly. Despite what many mothers will tell you, teething does not directly cause diarrhea, says the American Academy of Pediatrics. Hard fact: Teething itself won't make your baby produce stinkier diapers.