《内经》痿论与痹论、风论，分为三篇，病原不同，治法亦异。方书多杂见于风痹论中，将经文混淆，
后学迷离莫辨。按四体纵驰曰痿（经曰∶肺热叶焦，则皮毛虚竭急薄，着则生痿 。又曰∶带脉不引，故足不
用。经之所言者，止痿于足耳，而分筋、肉、骨、脉痿。道人治之而愈者，则不止于足，而有头痿、腰痿、
手痿、一身俱痿。其论形体枯泽，亦与经论稍有差池，而其治法，仍不外乎经义，不过于润燥活血队中，少加
桂为之向导。篇中所论，以所见言），与风相近而实相远，不仁不用，究非痪非瘫（《正字通》∶“瘫痪，四
体麻痹，筋脉拘急。”按诸医书，发于左为瘫，发于右为痪，男多发左，女多发右），不痛不肿，实非螈非
（筋急而缩为螈，筋驰而缓为 ，伸缩不己为螈 。按∶ ，驰之 ，外见风症）。有即发即愈者，有历一二日
方愈而复发者，
有周年半载而不愈者。语言依然爽朗，神气依然清明，饮食形体依然不变不减，令医有莫知所适从者。考本草
所注，黄柏、苍术为治痿之要药，医多不解，不敢轻用，而以为脾主四肢，纯以补脾温脾之品治之，致痿成终
身者比比矣。间亦有幸用而获效者，第知病之愈而不知病之所以愈，盍读《内经》而恍然焉。经曰∶“治痿独
取阳明”。阳明主润宗筋，为湿热所伤，宗筋不润，弛而不能束骨，发而为痿。苍术陡健阳明经，黄柏清热而
坚骨，药到病除，而后叹古人，名为二妙，实有妙不可言者。夫病源不清，见其方而不敢用其药；病源既清，
推其类可以尽其余。麦冬能治痿者（经验方∶麦冬，粳米煮粥），湿热蒸肺，肺叶焦而难以宣布，干地能治痿
者经验方∶干地黄四两，黄柏一两，知母一两，肉桂一钱，炼蜜为丸，湿热伤血，血脉涸而不能养筋。本草
所注，可以清热而凉血者，皆可以治痿也。病自我识，方自我立（书传古方，为后人之法程。明君臣之义，补
泻之理，非谓即以其方治病，南北之水土不同，古今之时势不同，年齿之老幼不同，冬夏之寒燠不同，赋禀之
浓薄不同，气质之清浊不同，境遇之顺逆不同，是在为医者运用之妙，存乎一心，有是症必有是方）即不用黄柏
、苍术可，即倍黄柏、苍术亦可。其或兼风、兼痹、兼虚，杂用治风、治痹、补虚，有何不可？至于脉，置之
勿论可也。
《黄帝内经》中的《痿论》、《痹论》和《风论》分为三篇，病因不同，治疗方法也各异。后世医书多将这些内容混杂在《风痹论》中，导致经文混淆，后学者难以分辨。
按照定义，四肢松弛无力称为“痿”（《内经》说：肺热叶焦，则皮毛虚竭急薄，着则生痿 。又说：带脉不引，故足不用。经典中所说的，仅限于足部的痿证，并分为筋痿、肉痿、骨痿、脉痿。道人治疗痊愈的病例，则不仅限于足部，还有头痿、腰痿、手痿、全身俱痿。其对形体枯槁或润泽的描述，也与经典论述略有出入，但其治疗方法，仍不离经典义理，不过是在润燥活血的药物队伍中，稍加桂枝作为向导。篇中所论，是以所见到的情况而言），与风邪相近但实际相距甚远，麻木且功能丧失，究其本质并非瘫痪（《正字通》：“瘫痪，四体麻痹，筋脉拘急。”按各种医书，发于左侧为瘫，发于右侧为痪，男性多发于左侧，女性多发于右侧），不痛不肿，确实不是抽搐（筋急而缩为抽搐，筋驰而缓为弛缓，伸缩不已为抽搐 。按： ，弛之 ，外见风症）。有的立即发作立即痊愈，有的经过一两天才痊愈但会复发，有的半年一年都不痊愈。语言依然爽朗，神气依然清明，饮食形体依然不变不减，令医生不知如何适从。考证本草所注，黄柏、苍术是治疗痿证的要药，医生多不理解，不敢轻易使用，而认为脾主四肢，纯用补脾温脾的药物来治疗，导致痿证成为终身疾病的比比皆是。偶尔也有侥幸使用而获效的，只知道病好了却不知道病为什么好，何不读《内经》而恍然大悟呢？《内经》说：“治痿独取阳明”。阳明经主润宗筋，若被湿热所伤，宗筋不润，弛缓而不能束骨，从而发生痿证。苍术陡健阳明经，黄柏清热而坚骨，药到病除，而后感叹古人，名为二妙散，实有妙不可言者。如果病因不清，见到方子而不敢用其中的药；病因既清，推其类可以尽其余。麦冬能治痿者（经验方：麦冬，粳米煮粥），湿热蒸肺，肺叶焦而难以宣发肃降，干地黄能治痿者（经验方：干地黄四两，黄柏一两，知母一两，肉桂一钱，炼蜜为丸），湿热伤血，血脉涸而不能养筋。本草所注，可以清热而凉血的药物，都可以治疗痿证。病由我自己认识，方由我自己创立（书传古方，为后人之法程。明君臣之义，补泻之理，非谓即以其方治病，南北之水土不同，古今之时势不同，年齿之老幼不同，冬夏之寒燠不同，赋禀之浓薄不同，气质之清浊不同，境遇之顺逆不同，是在为医者运用之妙，存乎一心，有是症必有是方）即不用黄柏、苍术也可以，即加倍黄柏、苍术也可以。或者兼有风邪、兼有痹证、兼有虚证，杂用治风、治痹、补虚的方法，有什么不可以？至于脉象，放在一边不论即可。
The "Treatise on Flaccidity" (Wei Lun), "Treatise on Bi Syndrome" (Bi Lun), and "Treatise on Wind" (Feng Lun) in the *Huangdi Neijing* (Yellow Emperor's Inner Canon) are divided into three separate chapters. Their etiologies differ, and thus their treatment methods also vary. Later medical texts often mixed these contents into discussions of wind and bi syndrome, causing confusion in the original scriptures and leaving later learners bewildered and unable to distinguish them clearly.
According to definitions, flaccid paralysis of the four limbs is termed "Wei" (Flaccidity Syndrome). The *Neijing* states: "When lung heat scorches the leaves [of the lungs], the skin and hair become deficient, exhausted, thin, and tight; if this condition attaches, it generates Wei." It also says: "When the Dai Mai (Girdle Vessel) fails to draw together, the feet lose function." The classics primarily discuss Wei affecting the feet, categorizing it into Jin Wei (Sinew Flaccidity), Rou Wei (Muscle Flaccidity), Gu Wei (Bone Flaccidity), and Mai Wei (Vessel Flaccidity). Cases cured by Daoist practitioners indicate that Wei is not limited to the feet but can manifest as Tou Wei (Head Flaccidity), Yao Wei (Waist Flaccidity), Shou Wei (Hand Flaccidity), or Shen Ju Wei (Whole Body Flaccidity). Descriptions of physical emaciation versus nourishment in these accounts slightly diverge from the classics, yet their therapeutic principles remain consistent with classical theory, merely adding Gui Zhi (Cinnamon Twig) as a guiding agent within formulas for moistening dryness and invigorating blood. The discussions in this chapter are based on observed phenomena. This condition appears similar to Wind pathogen invasion but is fundamentally distant from it. Numbness and loss of function do not constitute Tan Huan (Paralysis) (*Zhengzitong*: "Tan Huan refers to numbness of the four limbs and spasticity of sinews and vessels." According to various medical texts, onset on the left is called Tan, while onset on the right is called Huan; males are more prone to left-sided onset, females to right-sided onset). There is no pain or swelling, nor is it Chou Chu (Convulsion/Tetany) (Spasm and contraction of sinews is Chou, relaxation and laxity of sinews is Hu, continuous extension and flexion is Chou. Note: Hu implies laxity, externally resembling Wind symptoms). Some cases resolve immediately upon onset, others take one or two days to heal only to recur, and some persist for half a year to a year. Speech remains clear, spirit remains bright, diet and physique remain unchanged, leaving physicians at a loss regarding how to proceed.
Examining materia medica notes, Huang Bo (Phellodendron Bark) and Cang Zhu (Atractylodes Rhizome) are essential herbs for treating Wei. Physicians often fail to understand this and dare not use them lightly, instead believing that the Spleen governs the four limbs and therefore treating solely with Spleen-tonifying and warming agents. Consequently, Wei becomes a lifelong affliction in many cases. Occasionally, some achieve success by using these herbs, knowing only that the disease healed but not why. Why not study the *Neijing* to gain sudden enlightenment? The *Neijing* states: "In treating Wei, focus exclusively on the Yangming channels." The Yangming channel moistens the Zong Jin (Major Sinews). If injured by Damp-Heat, the Zong Jin lose moisture, become lax, fail to bind the bones, and result in Wei. Cang Zhu strongly fortifies the Yangming channel, while Huang Bo clears Heat and strengthens the bones. When the medicine arrives, the disease vanishes, leading one to sigh at the ancients' wisdom; named Er Miao San (Two Marvels Powder), its efficacy is truly indescribable. If the etiology is unclear, one may hesitate to use the herbs in a formula; once the etiology is clear, understanding one category allows comprehension of others. Mai Dong (Ophiopogon Tuber) can treat Wei (Empirical Formula: Mai Dong cooked with Jing Mi [Rice]); when Damp-Heat steams the Lungs, lung leaves scorch, making diffusion and descending difficult. Gan Di Huang (Rehmannia Root) can treat Wei (Empirical Formula: Gan Di Huang 4 liang, Huang Bo 1 liang, Zhi Mu 1 liang, Rou Gui 1 qian, refined honey for pills); Damp-Heat injures Blood, causing blood vessels to dry up and fail to nourish sinews. According to materia medica, any herb that clears Heat and cools Blood can treat Wei. The physician must recognize the disease personally and formulate accordingly (Transmitting ancient formulas serves as a standard for posterity. One must understand the roles of Sovereign, Minister, Assistant, and Courier herbs, and the principles of tonification and purgation. This does not mean applying the same formula blindly to all patients. Differences in geography and water/soil between North and South, changing times between past and present, age differences, seasonal variations in cold and heat, constitutional differences in robustness, temperamental differences in clarity and turbidity, and circumstantial differences in fortune and adversity—all require the physician's skillful application, stored in the heart. Where there is a specific pattern, there must be a specific formula). Thus, omitting Huang Bo and Cang Zhu is acceptable; doubling their dosage is also acceptable. If accompanied by Wind, Bi, or Deficiency, mixing treatments for Wind, Bi, and tonification for Deficiency is perfectly permissible. As for pulse diagnosis, it may be disregarded in this context.