What does a cavity feel like? My tooth kinda hurts but I think it may just be sensitive because I just started wearing my retainers to bed every night again after missing a week. Brandon thinks the retainers are hilarious and calls them my dentures. At least I don't have braces. My sister never wore her retainers and recently had to have her braces put back on. That's no fun in your 20's. Anyway, my tooth is seriously not reacting well to my ice water. I just don't want to break my "no cavities" record. Ah, well.