Did the man have a had headache?

M: Doctor! Doctor! Help me, please!
W: Take it easy, please! Sit here, now, what’s the matter with you? And can I help you?
M: I feel sick. I have a bad stomach-ache, 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, fight?
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’ll be fine.
M: Thanks, doctor. I’ll do as you told me. Good-bye, doctor.
W: Bye! And take care.