Did the man have a bad headache?

M: Doctor! Doctor! Help me, please!
W: Don’t worry, please. Sit here. Now, what’s wrong with you? And what can I do for you?
M: I feel terrible. I have a bad stomachache, and my head troubles a lot.
W: Well, let me give you 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, no, 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 all right.
M: Thanks, doctor. I’ll do as you told me. Good-bye, doctor.
W: Bye! And take cares.