"bright pictures proclaiming apothecaries, chandlers, barber-surgeons, merchants of cloth and wine"

Public DomainApothecary - Credit: Warja Honegger-Lavater
An apothecary was a person who sold medicine and medical supplies, and gave advice on them, similar to a modern pharmacist. They would also offer general medical advice.

A chandler made and sold candles.

In the Elizabethan period, surgery was usually performed by barbers rather than specialised physicians. Surgery was considered a trade rather than a skilled profession that required training. The traditional red and white stripes of the barbers’ poles is said to represent the blood and bandages used in surgery. Barbers also offered the services of teeth-pulling and bloodletting.