This was the most common cure for many problems. He would consult an astrological chart to see where your birth sign indicated your blood should flow from, then he would make small cuts or use leeches. Some birth sign cutting places were much more painful and delicate... so I wonder if people lied about their sign?
Did you know that at the time it was thought little worms caused tooth ache? 'Oil of cloves' was used to kill the worms which caused the pain, and if that did not work he had a nice large pair of pliers to pull your tooth out!