痿，大症也。诸痿生于肺热。经云∶五脏因肺热叶焦，发为痿 。肺气热，则皮毛先痿
而为肺鸣。心气热，则脉痿，胫纵不任地。肝气热，则筋痿，口苦而筋挛。脾气热，则肉痿
肌肤不仁。肾气热，则骨痿，腰脊不举。丹溪治法∶泻南方，补北方。泻南方，则肺金不受
刑，补北方则心火自下降，俾西方清肃之令下行，庶肺气转清，筋脉骨肉之间，湿热渐消而
痿可愈也。然经云∶治痿独取阳明，何也？盖阳明为脏腑之海，主润宗筋，宗筋主束骨而利
机关也，阳明虚，则宗筋纵，带脉不引，故足痿不用也，由前论之，则曰五脏有热，由后论
之，则曰阳明之虚，二说似异而实同，盖阳明胃属湿土，土虚而感寒热之化，则母病传子，
肺金受伤，而痿症作矣。是以治痿独取阳明也。取阳明者，所以祛其湿。泻南补北者，所以
清其热。治痿之法，不外补中祛湿，养阴清热而已矣。
治五脏痿。
人参 白术 茯苓（各一钱） 甘草（炙，四分） 当归（一钱五分） 苡仁（三钱） 麦冬（二钱） 黄柏
（炒褐色） 知母（各五分
水煎服。心气热，加黄连三分，丹参、生地各一钱；肝气热，加黄芩、丹皮、牛膝各一
钱；脾气热，加连翘一钱，生地一钱五分；肾气热，加生地、牛膝、石斛各一钱五分；肺气
热，加天冬、百合各二钱；挟痰，加川贝、竹沥；湿痰加半夏曲；瘀血，加桃仁、红花；如
气血两虚，另用十全大补汤；肾肝虚热，髓减骨枯，兼用虎潜丸主之。
十全大补汤 （见虚劳。
痿证，是一种严重的疾病。各种痿证都源于肺热。《内经》说：五脏因肺热导致叶焦，从而发为痿证。肺气热，则皮毛先发生痿弱，并出现肺鸣音。心气热，则发生脉痿，小腿松弛无法站立于地。肝气热，则发生筋痿，口苦且筋脉拘挛。脾气热，则发生肉痿，肌肤麻木不仁。肾气热，则发生骨痿，腰脊不能挺举。朱丹溪的治疗法则：泻南方（心火），补北方（肾水）。泻南方，则肺金不受火克；补北方，则心火自然下降，使得西方清肃之气下行，从而使肺气转清，在筋、脉、骨、肉之间，湿热逐渐消除，痿证即可痊愈。然而《内经》又说：治疗痿证要独取阳明经，为什么呢？因为阳明经是脏腑气血的海源，主要滋润宗筋，宗筋主管约束骨骼而利于关节运动。如果阳明经虚弱，则宗筋弛纵，带脉失去牵引力，所以足部痿废不能使用。从前文论述来看，说是五脏有热；从后文论述来看，说是阳明虚弱。这两种说法看似不同，实则相同。因为阳明胃属湿土，土虚而感受寒热之邪的转化，则母病传子，肺金受伤，于是痿证发作。因此治疗痿证要独取阳明。取阳明经，是为了祛除湿气；泻南补北，是为了清除热邪。治疗痿证的方法，不外乎补中益气、祛除湿气、滋养阴液、清除热邪罢了。
治疗五脏痿证。
人参、白术、茯苓（各一钱）、甘草（炙用，四分）、当归（一钱五分）、薏苡仁（三钱）、麦冬（二钱）、黄柏（炒至褐色）、知母（各五分）。
水煎服。若心气热，加黄连三分、丹参和生地各一钱；若肝气热，加黄芩、牡丹皮、牛膝各一钱；若脾气热，加连翘一钱、生地一钱五分；若肾气热，加生地、牛膝、石斛各一钱五分；若肺气热，加天冬、百合各二钱；若兼挟痰邪，加川贝母、竹沥；若是湿痰，加半夏曲；若有瘀血，加桃仁、红花；如果是气血两虚，另用十全大补汤；如果是肝肾虚热，髓减骨枯，兼用虎潜丸主治。
十全大补汤（见虚劳章节）。
Wei syndrome is a severe condition. All types of Wei syndrome originate from Lung heat. The Classics state: "When the five Zang organs suffer from Lung heat causing the leaves to wither, Wei syndrome develops." When Lung Qi is hot, the skin and hair first become flaccid, accompanied by Lung sounds. When Heart Qi is hot, Mai Wei (pulse Wei) occurs, characterized by relaxed calves unable to support the body weight. When Liver Qi is hot, Jin Wei (tendon Wei) occurs, presenting with bitter taste and tendon spasms. When Spleen Qi is hot, Rou Wei (muscle Wei) occurs, manifesting as numbness and insensitivity of the skin and flesh. When Kidney Qi is hot, Gu Wei (bone Wei) occurs, resulting in inability to extend the lower back and spine. Zhu Danxi's treatment method: Drain the South (Heart Fire) and tonify the North (Kidney Water). Draining the South ensures that Metal (Lung) is not subjected to fire suppression; tonifying the North causes Heart Fire to descend naturally, allowing the clear and descending function of the West to move downward. This clears the Lung Qi, gradually dissipates damp-heat among the tendons, vessels, bones, and flesh, thereby curing Wei syndrome. However, the Classics also state: "In treating Wei syndrome, one should exclusively focus on the Yangming channel." Why? Because Yangming is the sea of the Zang-fu organs, primarily nourishing the Zongjin (major tendons), which bind the bones and facilitate joint movement. If Yangming is deficient, Zongjin becomes lax, and the Dai meridian loses its tension, leading to foot Wei and inability to use the legs. Based on the previous discussion, it states that the five Zang organs have heat; based on the latter discussion, it states that Yangming is deficient. These two theories seem different but are essentially the same. Yangming Stomach belongs to Damp Earth; when Earth is deficient and affected by the transformation of cold or heat, the mother disease transmits to the child, injuring Lung Metal, thus triggering Wei syndrome. Therefore, treating Wei syndrome requires focusing exclusively on Yangming. Focusing on Yangming aims to dispel dampness; draining South and tonifying North aims to clear heat. The methods for treating Wei syndrome do not go beyond tonifying the middle, dispelling dampness, nourishing Yin, and clearing heat.
To treat Wei syndrome of the five Zang organs:
Renshen (Ginseng Radix), Baizhu (Atractylodis Macrocephalae Rhizoma), Fuling (Poria), each 1 qian; Gancao (Licorice Root), roasted, 4 fen; Danggui (Angelicae Sinensis Radix), 1.5 qian; Yiren (Coicis Semen), 3 qian; Maidong (Ophiopogonis Tuber), 2 qian; Huangbai (Phellodendri Cortex), fried until brown; Zhimu (Anemarrhenae Rhizoma), each 5 fen.
Decoct in water and take orally. If Heart Qi is hot, add Huanglian (Coptidis Rhizoma) 3 fen, Danshen (Salviae Miltiorrhizae Radix et Rhizoma) and Shengdi (Rehmanniae Radix) each 1 qian. If Liver Qi is hot, add Huangqin (Scutellariae Radix), Mudanpi (Moutan Cortex), and Niuxi (Achyranthis Bidentatae Radix) each 1 qian. If Spleen Qi is hot, add Lianqiao (Forsythiae Fructus) 1 qian and Shengdi (Rehmanniae Radix) 1.5 qian. If Kidney Qi is hot, add Shengdi (Rehmanniae Radix), Niuxi (Achyranthis Bidentatae Radix), and Shihu (Dendrobii Caulis) each 1.5 qian. If Lung Qi is hot, add Tiandong (Asparagi Tuber) and Baihe (Lilii Bulbus) each 2 qian. If complicated by phlegm, add Chuanbei (Fritillariae Cirrhosae Bulbus) and Zhuli (Bambusa Textilis Pith Juice); if damp-phlegm, add Banxiaqu (Pinelliae Fermentatum); if blood stasis, add Taoren (Persicae Semen) and Honghua (Carthami Flos); if both Qi and Blood are deficient, separately use Shiquan Dabu Tang (Ten Ingredients Great Tonifying Decoction); if there is deficiency-heat of Liver and Kidney with reduced marrow and withered bones, concurrently use Huqian Wan (Tiger Crouching Pill).
Shiquan Dabu Tang (see Xu Lao / Deficiency Consumption).