An old lady goes to the doctor and says 'doc, I can't stop farting.

They're silent with no smell, but l've let out 20 in the past 5 minutes sitting here'
The doc gives her some pills and tells her to come back next week.
The next week the old lady comes back and says
'doc, I took the pills, the farts are still silent but now they stink!'
The doc says 'great! We've cleared your sinuses, now let's work on your hearing!'