Shortwave diathermy is a therapeutic technique that uses high-frequency electromagnetic waves to generate heat within body tissues. This method is often employed in physical therapy to relieve pain, reduce inflammation, and promote healing in muscles and joints. The heat produced can enhance blood circulation and improve tissue flexibility. The treatment typically involves placing electrodes on the skin, which emit shortwave radiation. This radiation penetrates the skin and warms the underlying tissues without significantly affecting the surface. Shortwave diathermy is commonly used for conditions like arthritis, muscle strains, and tendonitis, making it a valuable tool in rehabilitation.