What is diathermy primarily used for?

Diathermy is primarily utilized for treatment with heat, making this the correct choice. It involves the use of high-frequency electromagnetic currents to generate heat within selected tissues. This therapeutic application is particularly effective in promoting blood flow, reducing pain, and accelerating the healing process in various musculoskeletal conditions.

By targeting deeper tissues without significantly warming the skin's surface, diathermy is favored for its ability to help alleviate muscle spasms and joint stiffness, making it an important tool in rehabilitation and physical therapy settings. The heat generated can also enhance tissue regeneration and improve mobility, all of which are central to effective treatment regimens.

While other options may reflect aspects of health treatments, diathermy specifically focuses on the application of heat for therapeutic benefits, clearly distinguishing its primary use in the context of physical therapy and surgical settings.