I noticed a tiny round black spot in 1 of my top tooth's and i thought it was food so i got a toothpick and tried to get it out for the longest!! Then i noticed that the tip of the toothpick was going inside the black part and that's when i realized it was a hole. Now im guessing this is a cavity but idk because i have never had any problems out of my teeth my whole life. Now every time i drink something cold it kinda hurts on that side of my teeth. So my questions r... Do i have a small cavity and if so what should i do? What can i do about the cold hurting my tooth? and do i have to have insurance to go to the dentist? Thanx guyz!!!