Why is the patient seeing the doctor?

M: Dr Brook, I just don’t know what’s wrong with me. I always feel tired and weak. My wife finally persuaded me to visit you to find out what the trouble is.
W: From what is written here I can see that you have a very bad cold three years ago and that you also had a  small operation last year. Did you have any bad effect after that?
M: Well, I don’t remember.
W: For example, bow long did you stay at home each time you were ill?
M: Just a couple of days, but about six months ago I was home for about two weeks with a cold or something.
W: Did you see a doctor at that time, or did you just stay at home?
M: No, I didn’t see a doctor. When I began to feel better, I returned to work.
W: And when did you start feeling so tired again?
M: It must have been about ten days ago. When I came home from work one night, there just didn’t seem to be any reason to go back the next day.
W: Well, it sounds as if your problem may be the kind of work you do. The test I just made doesn’t show anything really wrong. But I would like to make some further tests in the hospital.
M: That’s fine with me.
W: All right. You Can check tonight and I will make the tests tomorrow morning.