痹者。风寒暑湿之气中于人脏腑之为也。入腑则病浅易治。入脏则病深难治而有风痹。有寒痹。有湿痹。
有热痹。有气痹。而又有筋。肉。血。肉。气之五痹也。大凡风寒暑湿之邪入于肝。则名筋痹。入于肾。则名骨痹。
入于心。则名血痹。入于脾。则名肉痹。入于肺。则名气痹。感病则同。其治乃异。痹者闭也。五脏六腑。感于邪
气。乱于真气。闭而不仁。故曰痹。病或痛。或痒。或淋。或急。或缓。而不能收持。或拳而不能舒张。或行立艰难。
或言语謇涩。或半身不遂。或四肢拳缩。或口眼偏邪。或手足欹侧。或能行步而不能言语。或能言语而不
能行步。或左偏枯。或右壅滞。或上不通于下。或下不通于上。或大腑闭塞。（一作小便秘涩。）或左右手疼痛。或得疾
而即死。或感邪而未亡。或喘满而不寐。或昏冒而不醒。种种诸症。皆出于痹也。痹者风寒暑湿之气中于
人。则使之然也。其于脉候形证治疗之法。亦各不同焉。
气痹者。愁忧思喜怒过多。则气结于上。久而不消则伤肺。肺伤则生气渐衰。则邪气愈胜。留于上。则胸腹
痹而不能食。注于下。则腰脚重而不能行。攻于左。则左不遂。冲于右。则右不仁。贯于舌。则不能言。遗于肠
中。则不能溺。壅而不散。则痛。流而不聚。则麻。真经既损。难以医治。邪气不胜。易为痊愈。其脉右手寸口沉
而迟涩者是也。宜节忧思以养气慎（一作绝。）喜怒以全真。此最为良法也。
痹证，是风、寒、暑、湿等邪气侵入人体脏腑所致。邪气侵入六腑，则病情浅表，容易治疗；侵入五脏，则病情深重，难以治疗。痹证有风痹、寒痹、湿痹、热痹、气痹之分，此外还有因筋、肉、血、骨、气受损而形成的“五体痹”。
大凡风寒暑湿之邪侵入肝脏，称为筋痹（以筋脉拘急为主要表现的痹证）；侵入肾脏，称为骨痹；侵入心脏，称为血痹；侵入脾脏，称为肉痹；侵入肺脏，称为气痹。虽然感受的病因相同，但治疗方法却各不相同。所谓“痹”，就是闭塞不通的意思。五脏六腑受到邪气侵袭，导致真气紊乱，气血闭阻而不仁，所以称为痹证。
痹证的临床表现多种多样：有的疼痛，有的瘙痒，有的小便淋沥不畅，有的肢体拘急，有的松弛无力而不能持物，有的手指蜷曲不能伸展，有的行走站立困难，有的言语謇涩不清，有的半身不遂，有的四肢蜷缩，有的口眼歪斜，有的手足倾斜偏侧，有的能行走但不能说话，有的能说话但不能行走，有的左侧身体枯痿不用，有的右侧身体壅滞不利，有的上部之气不通达下部，有的下部之气不通达上部，有的大肠闭塞（一说为小便涩滞），有的左右手疼痛，有的患病后立即死亡，有的感邪后未立即死亡，有的气喘胸满且无法入睡，有的神志昏蒙不醒。种种症状，都源于痹证。这是因为风寒暑湿等邪气侵入人体所致。对于其脉象、体征及治疗方法，也各不相同。
气痹，是由于忧愁、思虑、喜悦、愤怒等情绪过度，导致气机郁结于上部。日久不消散则损伤肺脏，肺脏受损则生成正气的能力逐渐衰退，邪气因而更加亢盛，留滞于上部，导致胸腹部痹阻而不能进食；流注于下部，则腰脚沉重而不能行走；攻冲于左侧，则左侧肢体不遂；冲击于右侧，则右侧肢体麻木不仁；阻滞于舌根，则不能言语；遗留在肠道中，则不能排尿。气机壅塞而不能疏散，则产生疼痛；气流流动而不能聚拢，则产生麻木。如果真元经脉已经受损，就难以医治；若邪气尚弱，则容易痊愈。其脉象表现为右手寸口脉沉迟而涩。治疗宜节制忧愁思虑以养护正气，谨慎（一说断绝）喜怒以保全真元，这是最好的方法。
Bi syndrome is caused by the invasion of wind, cold, summer-heat, and dampness pathogens into the zang-fu organs. When the pathogens enter the fu organs, the disease is superficial and easy to treat; when they enter the zang organs, the disease is deep and difficult to treat. There are wind-bi, cold-bi, damp-bi, heat-bi, and qi-bi. Additionally, there are the five types of bi affecting the sinews, flesh, blood, bones, and qi. Generally, when wind, cold, summer-heat, or dampness pathogens invade the Liver, it is named Bi of Sinews (Jin-Bi). When invading the Kidney, it is named Bi of Bones. When invading the Heart, it is named Bi of Blood. When invading the Spleen, it is named Bi of Flesh. When invading the Lung, it is named Bi of Qi. Although the pathogenic factors causing the disease are similar, the treatment methods differ. "Bi" means obstruction. The five zang and six fu organs are invaded by evil qi, causing the true qi to become chaotic and obstructed, leading to a loss of sensation. Hence, it is called Bi.
The symptoms may include pain, itching, strangury (dysuria with frequency and urgency), spasm, flaccidity with inability to hold objects, curling of fingers unable to extend, difficulty in walking or standing, slurred speech, hemiplegia, curling and shrinking of the four limbs, deviation of the mouth and eyes, tilting of hands and feet, ability to walk but not speak, ability to speak but not walk, left-sided atrophy, right-sided stagnation, upper qi failing to reach the lower part, lower qi failing to reach the upper part, closure of the large intestine (alternatively interpreted as difficult urination), pain in either hand, immediate death upon onset of illness, survival after pathogen invasion, panting and fullness with insomnia, or stupor and unconsciousness. All these various symptoms stem from Bi syndrome, which is caused by the invasion of wind, cold, summer-heat, and dampness. The pulse patterns, clinical manifestations, and treatment methods vary accordingly.
Qi-bi results from excessive sorrow, worry, thoughtfulness, joy, or anger, causing qi to knot in the upper body. If unresolved for a long time, it damages the Lung. Lung damage leads to a gradual decline in the generation of healthy qi, allowing evil qi to prevail and remain in the upper body, causing chest and abdominal obstruction and anorexia. If it flows downward, it causes heaviness in the waist and legs and inability to walk. If it attacks the left side, it causes hemiplegia on the left; if it rushes to the right, it causes numbness on the right. If it penetrates the tongue, it causes aphasia. If it remains in the intestines, it causes urinary retention. If it stagnates without dispersing, it causes pain; if it flows without gathering, it causes numbness. Once the genuine meridians are damaged, it is difficult to treat; if the evil qi is weak, recovery is easy. The pulse characteristic is a deep, slow, and choppy pulse at the Cun-kou position on the right hand. Treatment should involve moderating sorrow and worry to nourish qi, and being cautious (or abstaining) from joy and anger to preserve true yuan. This is the best method.