What's wrong? I have a toothache.

Hi, Mr. Smith.
What’s wrong?
I have a toothache.
Open your mouth and say “Ahh.”
Ahh...
Hmm... You have a bad tooth.
Ah, ah....
Good! Don’t eat too many sweets and brush your teeth three times a day.
Yes, Mr. Smith. Thank you.
You’re welcome. See you in two days.
Okay.