One day, this old lady walks into the Doctors office complaining of severe gas. She's told to take a seat and the Doc would be with her soon. After about 15 minutes, the old lady is called into the examination room.
A few minutes later, the Doctor walks in and asks what's wrong.
"For some reason, I have really bad gas." states the lady. "Now, they don't make any noise and they don't smell but I had passed gas about 8 times in the waiting room and three times just waiting here."
The Doctor writes a prescription and tells her to come back next week.
The following week, the old lady returns. The Doctor asks how she's doing and she replys, "Well, I don't know what those pills were supposed to do, but now my gas smells nauseating."
The Doctor says "Now that we have your sinuses clear, we'll work on your hearing."