Interesting tidbit. Did you know where the red and white barber pole came from?
Even after the humoral system fell into disuse, the practice was continued by surgeons and barber-surgeons. Though the bloodletting was often recommended by physicians, it was carried out by barbers. This division of labour led to the distinction between physicians and surgeons. The red-and-white-striped pole of the barbershop, still in use today, is derived from this practice: the red represents the blood being drawn, the white represents the tourniquet used, and the pole itself represents the stick squeezed in the patient's hand to dilate the veins. Bloodletting was used to "treat" a wide range of diseases, becoming a standard treatment for almost every ailment, and was practiced prophylactically as well as therapeutically.
"God has not called me to be successful, God has called me to be faithful." Mother Teresa
"...not to advance in the spiritual life is to go back. But those who have the gale of the Holy Spirit go forward even in sleep.". Brother Lawrence