《伤寒论·伤寒例》
太阳、阳明、少阳这三经患病，为病在经脉，邪气尚未传入腑，可以用发汗法治愈。
此三经皆受病，未入于府者，可汗而已。
The diseases of the three channels Sun, Yangming, and Shaoyang are the diseases in the channels and collaterals, and the evil qi has not yet been transmitted to the internal organs, so they can be cured by sweating.