Diathermy is a medical treatment that uses high-frequency electrical currents to generate heat in body tissues. This heat can help relieve pain, reduce inflammation, and promote healing in various conditions, such as muscle strains and joint issues. It is commonly used in physical therapy and rehabilitation settings. There are different types of diathermy, including shortwave diathermy, microwave diathermy, and ultrasound diathermy. Each type varies in the frequency of the electrical currents used and the depth of tissue penetration. Diathermy is generally considered safe when performed by trained professionals, but it may not be suitable for everyone.