The History of Diathermy: Diathermy is a treatment involving the generation of heat within body tissues through electric currents. This method has been used for various medical treatments for decades. The term “diathermy” is derived from the Greek words “dia,” meaning “through,” and “thermia,” meaning “heat.” The concept of using heat for therapeutic purposes is ancient, but diathermy as we know it began to take shape in the late 19th and early 20th centuries. Early Beginnings: Nikola Tesla’s Contributions: In the late 1800s, Nikola Tesla, a pioneer in electrical engineering, demonstrated that high-frequency currents could generate heat in biological tissues. His work laid the groundwork for future developments in diathermy.