Did the man have a bad headache?

M:Doctor, I feel sick. I have a bad stomachache, and my head troubles me a lot.
W:Well, let me have a check. Open your mouth please. And say "Ah".
M:Ah! Is that serious, doctor?
W:Not really.Did you have your supper this evening?
M:No, I only had some bananas.
W:And the bananas were not quite ripe, right?
M:Well, yes, they were a bit green.
W:That explains it.
M:I wish I had not eaten them.
W:Take this medicine twice a day and I’m sure you’11 be fine.