What is a sauna? The benefits of a sauna. In a high-temperature environment, it can cause internal thermal effects in the deep skin, dilate the capillaries of the whole body, and greatly exceed normal activities. This kind of carefree sweating is conducive to discharging all kinds of garbage in the body and eliminating diseases. At the same time, due to repeated hot and cold steaming and washing, blood vessels are constantly contracting and expanding, which is called "vascular gymnastics" in…