One of the commonest complaints patients have about Indian doctors is that they keep medical records very poorly. This is true. Most doctors don't even bother to document their findings, diagnosis or treatment plan. They are usually quite haphazard, and patients are supposed to keep their prescriptions and fend for themselves.
This is why the doctor often has no clue as to what his diagnosis was, or what his original plan of action was the next time you go to see him, because he has no memory of that visit.