The Combination of the Yuan and Luo Points

The Yuan - ( Primary ) Points and Luo - ( Connecting ) Points may be used independently or in combination. The combination of them is called the " host and guest combination, " which is applied according to the occurring order of the diseases on the exteriorly - interiorly related meridians. When a meridian is first affected, its Yuan - ( Primary ) Point is used, while for second affected meridian, its Luo - ( Connecting ) Point is used. For instance, both the Lung Meridian and the Large Intestine Meridian are diseased, but the former is affected first, Taiyuan ( L 9 ) , its Yuan - ( Primary ) Point is selected as a main point, and Pianli ( Li 6 ) , the Luo - ( Connecting ) Point of the Large Intestine Meridian is used as a combining point. On the contrary, if the Large Intestine Meridian is diseased first and then the Lung Meridian, Hegu ( Li 4 ) , the Yuan - ( Primary ) Point should be prescribed as a main point, while Lieque ( L 7 ) , the Luo - ( Connecting ) Point as a combining point. This method is adopted when the externally - internally related meridians are affected. And it is known as the combination of the exterior - interior points.