The above applies to doctors, too
Fun Google game if you are bored... Google a symptom. Anything, split fingernail to itchy penis. It won't take long until you find a condition where that is a symptom, and the end result is "you will die slowly and in pain".
There's a lot to be said for NOT looking up medical conditions until you have enough experience to sort out the likely (minor ailment) from the unlikely (agony-death).