I'm obsessed with toothbrush germs right now-- I rinse mine and my son's brushes with hot water daily and change them often (like every couple of months).I asked my dentist if I'm being psycho and he said rule of thumb is generally 3 months for regular tooth brushes (4 months for Sonic care or other similar brushes) but if you have any kind of gum disease, it's 4 weeks (bacteria from gum disease will get on the brush).
Confession time: What about you? How often do you change your toothbrush?
You are not being paranoid Tina. I changed mine every 2 months.
2-3 months
More often if I'm sick
you should consider getting Zappi... it's a UV light that fits the top of your toothbrush to kill germs every time you use it.
I change every 3-4 months.