夫五脏者，肝象木，心象火，脾象土，肺象金，肾象水。其气更休更旺，互虚互实。自
相乘克，内生于病，此为正经自病，非外邪伤之也。若寒温失节，将适乖理，血气虚弱，为
风湿阴阳毒瓦斯所乘，则非正经自生，是外邪所伤，故名横病也。其病之状，随邪所伤之脏而
形证见焉。其汤熨针石，别有正方，补养宣导，今附于后。
《养生方·导引法》云∶从膝以下有病，当思齐下有赤光，内外连没身也；从膝以上至腰
有病，当思脾黄光；从腰以上至头有病，当思心内赤光；病在皮肤寒热者，当思肝内青绿光
。皆当思其光，内外连而没已身，闭气，收光以照之。此消疾却邪甚验。笃信，精思行之，
病无不愈。
脾胀病者，是脾虚为风邪所乘，正气与邪气交结，令脾气不宣调，拥聚而胀也。其病喜
哕，四肢急，体重不能胜衣也。
心痛者，风冷邪气乘于心也。其痛发，有死者，有不死者，有久成疹者。
心为诸脏主而藏神，其正经不可伤，伤之而痛，为真心痛，朝发夕死，夕发朝死。
心有支别之络脉，其为风冷所乘，不伤于正经者，亦令心痛，则乍间乍甚，故成疹不死
。
又，心为火，与诸阳会合，而手少阴心之经也。若诸阳气虚，少阴之经气逆，谓之阳虚
阴厥，亦令心痛，其痛引喉是也。
又，诸脏虚受病，气乘于心者，亦令心痛，则心下急痛，谓之脾心痛也。
足太阴为脾之经，与胃合。足阳明为胃之经，气虚逆乘心而痛。其状腹胀，归于心而痛
甚，谓之胃心痛也。
肾之经，足少阴是也，与膀胱合；膀胱之经，足太阳是也。此二经俱虚而逆，逆气乘心
而痛者，其状下重，不自收持，苦泄寒中，为肾心痛也。
诊其心脉微急，为心痛引背，食不下。寸口脉沉紧，苦心下有寒，时痛。关上脉紧，心
下苦痛。左手寸口脉沉，则为阴绝；阴绝者，无心脉也，苦心下毒痛。
五脏中，肝对应木，心对应火，脾对应土，肺对应金，肾对应水。它们的正气交替休息与旺盛，相互出现虚损或实证。如果五行之间相互乘侮克制，在内产生疾病，这属于正经自病，并非由外邪伤害所致。如果寒温调节失当，起居行为违背常理，导致血气虚弱，被风湿、阴阳毒等邪气侵袭，这就不是正经自生之病，而是外邪所伤，所以称为横病。疾病的症状，会随着邪气所伤害的脏腑而显现相应的形证。治疗所用的汤药、熨法、针刺和砭石，另有专门的方剂，补益调养和导引宣通的方法，现在附在后面。
《养生方·导引法》说：从膝盖以下有病，应当想象下方有红光，内外相连并笼罩全身；从膝盖以上到腰部有病，应当想象脾脏有黄光；从腰部以上到头部有病，应当想象心脏有赤光；病在皮肤且伴有寒热症状的，应当想象肝脏内有青绿光。都应当观想这些光芒，内外相连并覆盖自己的身体，闭住气息，收敛光芒来照射患处。这种方法消除疾病、驱除邪气非常灵验。只要深信不疑，精心思考并坚持实行，没有治不好的病。
脾胀病，是由于脾气虚弱，被风邪侵袭，正气与邪气交结，导致脾气不能宣通调和，郁结积聚而形成胀满。这种病喜欢打呃逆，四肢拘急沉重，身体沉重得连衣服都承受不起。
心痛，是风冷邪气侵袭心脏所致。疼痛发作时，有的会导致死亡，有的不会死亡，有的长期发展形成疹疾（此处指慢性顽疾）。
心是各脏腑的主宰，并藏神。心的正经不可受伤，如果受伤而疼痛，称为真心痛，早上发病晚上死，晚上发病早上死。心有分支的络脉，如果被风冷侵袭，但未伤及正经，也会导致心痛，疼痛时轻时重，因此形成慢性顽疾而不致死。
另外，心属火，与各阳经会合，手少阴心经与之相关。如果诸阳之气虚弱，少阴经的气机逆乱，称为阳虚阴厥，也会导致心痛，其疼痛牵引喉咙就是这种情况。
还有，其他脏腑虚弱受病，邪气上乘于心，也会导致心痛，表现为心下急迫疼痛，称为脾心痛。
足太阴脾经，与胃相表里配合。足阳明胃经，如果气虚逆乱上乘于心而致痛，其症状为腹胀，病气归聚于心则疼痛加剧，称为胃心痛。
肾的经脉是足少阴经，与膀胱相表里配合；膀胱的经脉是足太阳经。这两条经脉都虚弱且气机逆乱，逆气上乘于心而致痛，其症状为下肢沉重，无法自主控制，苦于腹泻和腹部寒冷，称为肾心痛。
诊察心脉微急，是心痛牵引背部，饮食不下。寸口脉沉紧，是心下有寒，时常疼痛。关上脉紧，是心下苦痛。左手寸口脉沉，则是阴绝；阴绝者，没有心脉，心下剧烈毒痛。
The five zang organs correspond to the five elements: the Liver corresponds to Wood, the Heart to Fire, the Spleen to Earth, the Lung to Metal, and the Kidney to Water. Their Qi alternates between rest and prosperity, appearing deficient or excess in relation to one another. If they mutually overcome and restrict each other (Wu Xing mutual overacting), disease arises internally; this is termed "self-disease of the regular meridians" (Zheng Jing Zi Bing), not caused by external pathogens. However, if regulation of cold and warmth is lost, and daily conduct violates proper principles, leading to deficiency of Blood and Qi, and invasion by Wind-Dampness or Yin-Yang toxic factors, it is not a self-generated disease of the regular meridians but an injury by external pathogens; hence it is named "transverse disease" (Heng Bing). The manifestations of such diseases appear according to the specific zang organ injured by the pathogen. Decoctions, heat compresses, acupuncture, and stone therapy have separate standard prescriptions; methods for tonification, nourishment, and guidance/diffusion are attached below.
The *Yang Sheng Fang* (Prescriptions for Nourishing Life) · *Dao Yin Fa* (Guiding and Pulling Methods) states: For diseases from the knees downward, visualize red light from below, connecting internally and externally to envelop the body; for diseases from the knees upward to the waist, visualize yellow light within the Spleen; for diseases from the waist upward to the head, visualize red light within the Heart; for diseases in the skin accompanied by chills and fever, visualize green-blue light within the Liver. In all cases, visualize the light connecting internally and externally to cover oneself, hold the breath, and gather the light to illuminate the affected area. This method is highly effective in eliminating disease and expelling evil. With firm belief and focused contemplation practiced diligently, no disease will remain uncured.
Spleen Distension Disease (Pi Zhang) occurs when Spleen deficiency allows Wind-Evil to invade. The Righteous Qi and Evil Qi knot together, preventing the Spleen Qi from being smooth and regulated, leading to stagnation, accumulation, and distension. Symptoms include a tendency toward hiccups (Yue), stiffness and urgency in the four limbs, and heavy body weight such that even clothes feel unbearable.
Heart Pain (Xin Tong) results from Wind-Cold evil invading the Heart. Upon onset of pain, some patients die, while others survive; some develop chronic stubborn conditions (Zhen) over time.
The Heart is the master of all zang organs and houses the Spirit (Shen). Its regular meridians must not be injured. If injured and painful, it is called True Heart Pain (Zhen Xin Tong); onset in the morning leads to death in the evening, and onset in the evening leads to death in the morning. The Heart has branch collateral vessels. If invaded by Wind-Cold without injuring the regular meridians, heart pain may still occur, characterized by intermittent severity (Zha Jian Zha Shen), resulting in a chronic condition without death.
Furthermore, the Heart belongs to Fire and converges with all Yang meridians, specifically the Hand-Shaoyin Heart Meridian. If Yang Qi is deficient and the Qi of the Shaoyin meridian rebels upward, it is called Yang Deficiency with Yin Collapse (Yang Xu Yin Jue), which also causes heart pain, often radiating to the throat.
Additionally, when other zang organs are deficient and diseased, their pathogenic Qi may rush up to the Heart, causing heart pain characterized by urgent pain below the heart, known as Spleen Heart Pain (Pi Xin Tong).
The Foot-Taiyin Spleen Meridian is paired with the Stomach. The Foot-Yangming Stomach Meridian, if Qi is deficient and rebels upward to attack the Heart causing pain, presents with abdominal distension; when the pathogenic Qi returns to the Heart, the pain intensifies, known as Stomach Heart Pain (Wei Xin Tong).
The Kidney meridian is the Foot-Shaoyin Meridian, paired with the Bladder. The Bladder meridian is the Foot-Taiyang Meridian. If these two meridians are both deficient and rebellious, the counterflow Qi attacks the Heart causing pain. Symptoms include heaviness in the lower body, inability to control oneself, suffering from diarrhea and cold in the middle jiao, known as Kidney Heart Pain (Shen Xin Tong).
Palpation of the Heart pulse showing slight tension indicates heart pain radiating to the back and inability to eat. A deep and tight pulse at the Cun Kou position indicates cold below the heart with intermittent pain. A tight pulse at the Guan position indicates severe pain below the heart. A deep pulse at the left Cun Kou position indicates Yin Extinction (Yin Jue); those with Yin Extinction lack the Heart pulse and suffer from toxic pain below the heart.