Perspiration is the product of metabolism and the resin comes out through the hole of skin. And it keeps constant with heart and blood. So, it has great meaning in the clinical medicine and it is closely connected with the qi, blood, body fluid and viscera in our body. In the oriental medicine it is said that when our body is attacked with the evil qi and it locates in the surface of our body, we must induce the perspiration and it is called 'Method of Perspiration'. If we use that method we should refer the contraindication, and historical doctors stressed the need of deliberate use. However, the moderns have the misunderstandings about the perspiration. When they have alcoholic trouble and feel fatigue, they wring out the sweat. And they think that doing has good results. They even sweat off their surplus fat. But, that doing is rashly as that is an energy-consuming behavior and it shorten one's span of life because of the running dry of the resin. Therefore, we must use very carefully the 'Method of Perspiration' and not wring out the sweat rashly.