属足少阳胆经（《灵枢》曰∶足少阳之脉，抵绝骨之端，下出外踝之前。所生病者，外
踝前及诸节皆痛。又曰∶足少阳之筋，上结外踝上。又曰∶足少阳之下，血气盛，则胫毛美长，外踝肥；血气
皆少，则胫无毛，外踝瘦无肉。《素问》曰∶膝痛淫泺胫酸，不能久立，治少阳之络，在外踝上五寸。注∶淫
泺，谓似酸痛而无力也。外踝上五寸，乃足少阳之络，光明穴也。沈承之曰∶手足六经，散而为十二则，曰∶
自下臂，外廉之中，手少阳也；外之上廉，手阳明也；外之下廉，手太阳也。自髀下胫，外廉之中，足少阳
也；外之前廉，足阳明也；外之后廉，足太阳也。自 下臂，内廉之中，手厥阴也；内之上廉，手太阴也；内
之下廉，手少阴也。自股下胫，内廉之中，足厥阴也；内之前廉，足太阴也；内之后廉，足太阴也。统而为
六则，曰∶外则三阳主之，中曰少阳，前曰阳明，后曰太阳；内则三阴主之，中曰厥阴，前日太阴，后曰少阴。
约而为三则，曰∶阳明与太阴为表里，故并居于前；太阳与少阴为表里，故并居于后；少阳与厥阴为表里，
故并居于中。在手为手经，在足为足经。虽若不齐，而实则一贯，学人知此，则易晓而不忘矣）。又属阳跷脉
（《难经》曰∶阳跷脉，起于跟中，循外踝上行入风池）。
Belongs to the Foot-Shaoyang Gallbladder Meridian (The *Ling Shu* states: The Foot-Shaoyang meridian reaches the end of the Jiegu bone, descends and emerges anterior to the lateral malleolus. Diseases occurring in this meridian include pain in the area anterior to the lateral malleolus and in various joints. It also states: The Foot-Shaoyang sinew channel ascends and binds above the lateral malleolus. Furthermore: Below the Foot-Shaoyang, if blood and qi are abundant, the leg hair is beautiful and long, and the lateral malleolus is fleshy; if both blood and qi are deficient, there is no leg hair, and the lateral malleolus is thin without flesh. The *Su Wen* states: Pain in the knees, heaviness and soreness in the calves with inability to stand for long periods, should be treated by the collateral of the Shaoyang of the Foot, located five cun above the lateral malleolus. Note: Yinluo refers to a sensation resembling soreness and weakness. Five cun above the lateral malleolus is the Luo-connecting point Guangming of the Foot-Shaoyang meridian. Shen Chengzhi said: The six meridians of the hand and foot, when dispersed into twelve, follow these rules: From the lower arm to the middle of the lateral aspect, it is the Hand-Shaoyang; at the upper edge of the lateral aspect, it is the Hand-Yangming; at the lower edge of the lateral aspect, it is the Hand-Taiyang. From the thigh down to the leg, at the middle of the lateral aspect, it is the Foot-Shaoyang; at the anterior edge of the lateral aspect, it is the Foot-Yangming; at the posterior edge of the lateral aspect, it is the Foot-Taiyang. From the lower arm to the middle of the medial aspect, it is the Hand-Jueyin; at the upper edge of the medial aspect, it is the Hand-Taiyin; at the lower edge of the medial aspect, it is the Hand-Shaoyin. From the thigh down to the leg, at the middle of the medial aspect, it is the Foot-Jueyin; at the anterior edge of the medial aspect, it is the Foot-Taiyin; at the posterior edge of the medial aspect, it is also the Foot-Taiyin [Note: Textual error likely intended Foot-Shaoyin]. Unified into six main pathways, the rule is: The lateral side is governed by the three Yang meridians, with Shaoyang in the middle, Yangming anteriorly, and Taiyang posteriorly; the medial side is governed by the three Yin meridians, with Jueyin in the middle, Taiyin anteriorly, and Shaoyin posteriorly. Summarized into three main pathways, the rule is: Yangming and Taiyin are exterior-interior pairs, thus residing together anteriorly; Taiyang and Shaoyin are exterior-interior pairs, thus residing together posteriorly; Shaoyang and Jueyin are exterior-interior pairs, thus residing together medially. In the upper limbs they are called Hand meridians, and in the lower limbs Foot meridians. Although they may appear irregular, they are essentially consistent. Understanding this makes it easy to comprehend and remember.) It also belongs to the Yang Qiao Mai (The *Nan Jing* states: The Yang Qiao Mai originates from the center of the heel, follows the lateral malleolus upward, and enters Fengchi).