Every 3 to 4 Months
Dentists recommend changing your toothbrush—or electric brush head—every 3 to 4 months. Over time, bristles wear out and become less effective at removing plaque. Frayed bristles can also damage your gums and harbor bacteria, reducing your toothbrush's overall cleanliness.

Signs It’s Time to Replace
If you notice bent or discolored bristles, it's a clear sign to swap out your toothbrush sooner. After being sick, especially with a cold or flu, you should also replace it to prevent reintroducing germs. A fresh toothbrush ensures you're maintaining optimal oral hygiene every day.