How often should you change toothbrushes?
Brushing two or more times per day is still considered standard for a manual toothbrush. At this rate of use, the bristles in your brush will start to fall out and become mangled or twisted within about 3 months.
The Center for Disease Prevention and Control (CDC) also advises to replace your toothbrush every 3 to 4 months, or whenever it appears to be getting worn out.
How often should you change an electric toothbrush head?
Plan to change the toothbrush head of your electric toothbrush every 4 months, or even earlier. Watch for signs of wear and tear on the bristles.
Other reasons to change your toothbrush.
If you or a family member have been sick, it’s a good idea to replace your toothbrush as well as the toothbrush of everyone else in your household.