The history of the barber pole dates from the days when the barber was responsible for more than cutting hair. Shaves, tooth extraction and bloodletting were also available. The shape of the pole is said to have derived from the wooden stick that a patient squeezed to make the veins in his arm stand out more prominently for the bloodletting procedure.
The red stripes on the pole represented the blood removed from the patient, and the white stripes represented the bandages used to stem the bleeding. The twisting design of the stripes symbolized the bloody bandages hung out to dry in the front of the barber shop, which twisted and turned in the wind. Note that the early barber poles did not have a blue stripe. The shape of the bottom of the classic barber pole is similar to the shape of the container used for holding bloodletting leeches in the late 1800s.
It was not until the early part of the 1900s that barber poles came to have the now-classic rotating cylinder. Prior to 1925, a hand wound clock-like mechanism turned the striped cylinder. A single winding kept the pole rotating for up to 12 hours. By the 1930s, new poles were turned by electric motors.