Electro Magnetic therapy has a long history back to at least Ancient China, and shows the use of two related phenomena that would later be combined into one method (Pulsed Electromagnetic Field Therapy):
There are many ancient references to the healing use of magnetite (the most common mineral with magnetic properties, also known as lodestone and also used for navigation at sea).
The earliest mention is in the Yellow Emperor’s Book of Internal Medicine, written in China and dated to around 2600 BC, the earliest known medical text. It describes the placement of lodestones on specific points on the body to correct various imbalances. Similar practices are described in the Vedas, the ancient Hindu scriptures of India.
Further references appear from ancient Greece, with Plato describing the physician Pliny’s use of magnetite to treat wounds and bladder problems. The main theory behind these techniques was that they helped to circulate energies and fluids around the body, an approach that can be seen with the Swiss physician Paracelsus in the 1500’s, and in 1600 with the Englishman William Gibert, physician to Queen Elizabeth I.