An infrared sauna is a type of sauna that uses infrared heaters to emit infrared light, which is absorbed by the surface of the skin and experienced as radiant heat. Unlike traditional saunas, which heat the air around you, infrared saunas heat your body directly, resulting in a lower ambient air temperature and allowing for longer sustained stays in the sauna. Infrared light also penetrates the body deeply, resulting in a fast and vigorous sweat being produced. The average ambient temperature in an infrared sauna is usually 40–60 °C (104–140 °F) compared to 70–90 °C (158–194 °F) in traditional saunas.

Proponents of infrared saunas claim that they have a number of health benefits, including improved heart health, soothing sore muscles, pain relief, relaxation, and improved sleep. However, many of these claims are not supported by scientific evidence and are considered pseudoscientific. While infrared saunas can be more comfortable for people than traditional saunas, they may not be suitable for everyone, particularly those with certain medical conditions. It is important to consult with a healthcare provider before using an infrared sauna.