Can brushing your teeth too much be possible? Can it damage your teeth? I am a bit obsessive about this sort of thing. I brush twice daily, floss once a night, and use mouthwash when I brush. however, my girlfriend says i brush for too long when i do, usually like 3-5 minutes maybe. I still get cavities pretty often and i dont know what to do about this.I think it may be ruining my gums too. Any thoughts? whats the recommended regimen for oral cleanliness?