In this age and time it seems that everybody needs a doctor.  As I have mentioned before, the human body can get sick from the top of the head to the bottom of the feet. There are doctors specializing in all kinds of sicknesses.  Almost everyone trusts that their doctor can help them to cure whatever ailment the body has come down with.  The biggest problem that a doctor may have with the patient is that there are quite a few medications (or maybe a hundred or more) for a specific ailment.  So, the doctor  prescribes whatever medication he or she thinks may be good for the patient.  Unfortunately, all medications have side effects;  some are mild, others are more acute, and still others are very dangerous.   For this reason, a doctor tells the patient to come back in a week or sooner if any side effects have created serious problems.