What is diathermy primarily used for?

Diathermy is primarily used to increase body tissue temperature through the application of high-frequency electromagnetic currents. This process produces heat in body tissues, which can help improve blood flow, relax muscles, and promote healing in injured areas. It is commonly utilized in physical therapy and rehabilitation settings to treat conditions such as muscle strain, arthritis, and joint stiffness. The heat generated can also enhance the effectiveness of certain therapeutic procedures by increasing tissue elasticity and reducing discomfort.

The other options relate to different techniques and purposes within the realm of esthetics and medical treatments. Diagnosing skin conditions typically involves visual examination and possibly diagnostic tests, while exfoliating the skin refers to the removal of dead skin cells through various methods. Hair removal, particularly permanent options, involve specific technologies like laser treatment or electrolysis, rather than the thermal approach that diathermy represents.