Teething and Diarrhea: No Causal Link—Myth vs. Reality

Teething does not cause diarrhea. This is a persistent myth.

What Teething Actually Causes

• Increased drooling (salivary gland maturation)
• Gum irritation → chewing, irritability
• Mild sleep disruption
• Transient decreased appetite for solids

Why the Myth Persists

• Temporal coincidence: teething (6–24 mo) overlaps with increased viral exposure (daycare, oral exploration)
• Excess swallowed saliva → looser stools (not true diarrhea)
• Confirmation bias

Action

If diarrhea (≥3 watery stools/24 hrs) occurs with fever, blood, mucus, dehydration signs, or persists >2 days → see pediatrician. Do not attribute to teething. Causes: viral (rotavirus, norovirus), bacterial, parasitic, dietary, antibiotic-associated.