Why the pole is red and white

The barber pole is the only trade sign most people can still read on sight. Almost nobody knows it is an advertisement for surgery.

For several hundred years across Europe, the barber and the surgeon were often the same person, and in a lot of towns the barber was the one you could actually get to. Barbers pulled teeth, lanced boils, dressed wounds and, more than anything else, let blood. Bloodletting was a standard treatment for an enormous range of complaints. It was not exotic work. It was Tuesday.

The pole is a piece of the equipment

To open a vein in someone's arm you want the vein standing up. The patient was handed a staff and told to grip it and squeeze. The staff got blood on it.

The linen used to bind the arm afterwards was washed and hung out to dry, and the convenient place to hang it was that same staff, stood outside the door, where the wind wrapped the strips around it in a spiral.

Red for the blood. White for the linen. The brass ball on top is usually explained as the basin, the one that caught what came out or held the leeches.

Whether every pole began exactly that way is not something anyone can prove now. What is not in dispute is that a red and white spiral meant bloodletting long before it meant haircuts.

The split

In England the two trades were formally joined and then formally pulled apart. In 1540 Henry VIII merged the barbers' guild with the surgeons' fellowship into a single Company of Barber-Surgeons, and drew a line down the middle of it: barbers were to keep to dentistry and bloodletting, surgeons were to leave the shaving alone. In 1745 the surgeons left to form their own company, which in time became the Royal College of Surgeons.

The surgeons took the surgery. The barbers kept the pole.

The blue is younger, and nobody agrees why

American poles are red, white and blue. You will be told the blue is venous blood, and you will be told it is simply patriotic. There is no settled answer. Anyone who gives you one is guessing confidently.

Why it is worth knowing

Mostly because clients enjoy it, and it is a better thing to talk about than the weather. But it is also worth knowing that you are working in one of the oldest continuously practised trades there is, and that the sign outside the window is older than most of the countries it hangs in. Not many jobs come with that.