Q. Hello Dr. Andrew, I would like to whiten my teeth however i think i have some cavities. I heard that whitening my teeth while having cavities is not good.. Why is that so? I can try to whiten my teeth, however, I don’t think I can afford to treat my cavities because i do not have the dental insurance. Is it okay to try some teeth whitening products while having cavities? How would it affect my teeth? Thanks!