〔原文〕一法∶以两手着头上相叉，长气即吐之，坐地缓舒两脚，以两手
外抱膝中，疾低头入两膝间，两手交叉头上十三通，愈三尸也。
〔解说〕把两手交叉放在头上，长吸气即吐出。坐在地上，慢慢地伸展两脚，
用两手从外边将膝抱起，急低头进入两膝之间，这样两手交叉抱头上行功十三遍，
可治三尸病。
〔原文〕二法∶叩齿二七过，取咽气二七。如三百通乃止。为之二十日，邪气
悉去；六十日，小病愈；百日，大病除，三虫伏尸皆去，面体光泽也。
〔解说〕叩齿十四次，吞气咽下十四次，为一通，如此做三百通为止。连做二
十日，可使体内邪气都消除；做六十日，小病可愈；做一百日，大病可除，藏于体内
的三虫和伏尸均可消除，使人精神焕发，面体光泽。
小结∶
痨瘵即是肺痨病，也就是肺结核病。古人认为人身中有作祟损人，使人患痨瘵的“
三尸”和“三虫”等。《诸病源候论》“卷二十三·尸病诸候”说∶“人身内自有三
尸诸虫，与人俱生，而此虫忌恶（禁忌邪恶，犯之则为害伤人），能与鬼灵相通，常接引
外邪，为人患害，其发作之状，或沉沉默默，不得知所苦，而无处不恶；或腹痛胀急；或
块踊起；或挛引腰脊；或精神杂错。”并指出三尸为∶飞尸、遁
尸，沉尸，另有风尸、尸注（与三尸合称五尸）及伏尸等。道家认为，三尸是隐藏
在人体的作祟之神，每逢庚申日，向天神诉说人的过恶，损人身心。三尸者，
上尸青姑，伐人眼；中尸白姑，伐人五脏；下尸血姑，伐人胃命。气功练到一定
程度，可驱三尸，使人长寿。
三虫，就是长虫（蛔虫）、赤虫（姜片虫）和蛲虫。是人体寄生虫。又与伏虫、
白虫、肉虫、肺虫、胃虫、弱虫，合称九虫。
本篇针对“痨瘵病”的特点，提出了二种导引法。一是以双手抱头，长吸气，缓吐
气，再坐下缓展两脚，用手抱膝，向两膝间低头，并抱头十三通。一是叩齿和吞咽气
。叩齿，又称“琢齿”，本书“十九、口齿门”有∶“一法∶东向坐，不息四通，上下
琢齿三十六。治齿痛。”并认为叩齿“常数行之，使齿不痛，发牢不白，头脑不痛。”
叩齿的方法可先叩臼齿三十六次，次叩门牙三十六次，再错牙叩犬齿各三十六次，
最后用舌舔牙周三、五遍。每天清晨刷牙嗽口后进行最好。也可以随时行之。
【原文】方法一：将双手在头顶交叉，深吸气后缓缓呼出，坐在地上慢慢伸直双腿，用双手从外侧抱住膝盖，迅速低头使头进入两膝之间。双手在头顶交叉共做十三次，可治愈三尸病。
【解说】把两手交叉放在头上，长吸气即吐出。坐在地上，慢慢地伸展两脚，用两手从外边将膝抱起，急低头进入两膝之间，这样两手交叉抱头上行功十三遍，可治三尸病。
【原文】方法二：叩齿十四次，吞咽气息十四次为一通。如果做到三百通才停止。坚持练习二十天，邪气全部去除；六十天，小病痊愈；一百天，大病消除，潜伏体内的三虫和伏尸都去除，面部和身体会呈现光泽。
【解说】叩齿十四次，吞气咽下十四次，为一通，如此做三百通为止。连做二十日，可使体内邪气都消除；做六十日，小病可愈；做一百日，大病可除，藏于体内的三虫和伏尸均可消除，使人精神焕发，面体光泽。
小结：
痨瘵（Lao Zhai，指慢性消耗性疾病，如肺痨）即是肺痨病，也就是肺结核病。古人认为人身中有作祟损人，使人患痨瘵的“三尸”和“三虫”等。《诸病源候论》“卷二十三·尸病诸候”说：“人身内自有三尸诸虫，与人俱生，而此虫忌恶（禁忌邪恶，犯之则为害伤人），能与鬼灵相通，常接引外邪，为人患害，其发作之状，或沉沉默默，不得知所苦，而无处不恶；或腹痛胀急；或块踊起；或挛引腰脊；或精神杂错。”并指出三尸为：飞尸、遁尸，沉尸，另有风尸、尸注（与三尸合称五尸）及伏尸等。道家认为，三尸是隐藏在人体的作祟之神，每逢庚申日，向天神诉说人的过恶，损人身心。三尸者，上尸青姑，伐人眼；中尸白姑，伐人五脏；下尸血姑，伐人胃命。气功练到一定程度，可驱三尸，使人长寿。
三虫，就是长虫（蛔虫）、赤虫（姜片虫）和蛲虫。是人体寄生虫。又与伏虫、白虫、肉虫、肺虫、胃虫、弱虫，合称九虫。
本篇针对“痨瘵病”的特点，提出了二种导引法。一是以双手抱头，长吸气，缓吐气，再坐下缓展两脚，用手抱膝，向两膝间低头，并抱头十三通。一是叩齿和吞咽气。叩齿，又称“琢齿”，本书“十九、口齿门”有：“一法：东向坐，不息四通，上下琢齿三十六。治齿痛。”并认为叩齿“常数行之，使齿不痛，发牢不白，头脑不痛。”叩齿的方法可先叩臼齿三十六次，次叩门牙三十六次，再错牙叩犬齿各三十六次，最后用舌舔牙周三、五遍。每天清晨刷牙嗽口后进行最好。也可以随时行之。
[Original Text] Method 1: Cross both hands above the head, take a deep breath and exhale slowly. Sit on the ground and slowly extend both legs. Use both hands to embrace the knees from the outside, quickly lower the head between the two knees. Cross the hands above the head for thirteen repetitions; this can cure the disease of the Three Corpses (San Shi).
[Explanation] Cross both hands and place them on the head, inhale deeply and then exhale. Sit on the ground, slowly stretch out both legs, use both hands to lift the knees from the outside, quickly lower the head into the space between the knees. Perform this exercise of crossing hands and embracing the head thirteen times; it can treat the disease of the Three Corpses.
[Original Text] Method 2: Clench teeth fourteen times, swallow qi fourteen times as one repetition. Continue until three hundred repetitions are completed. Practice for twenty days, and all pathogenic factors will be eliminated; after sixty days, minor illnesses will heal; after one hundred days, major illnesses will be cured, and the Three Worms (San Chong) and Fu Shi (Latent Corpse) hidden in the body will be expelled, resulting in a lustrous complexion and body.
[Explanation] Clench teeth fourteen times, swallow qi fourteen times as one repetition; continue doing so until three hundred repetitions are reached. Practicing continuously for twenty days eliminates internal pathogenic factors; practicing for sixty days heals minor ailments; practicing for one hundred days cures major diseases, expels the Three Worms and Latent Corpse stored within the body, and revitalizes the spirit, giving the face and body a radiant glow.
Summary:
Lao Zhai refers to pulmonary tuberculosis (TB), also known as consumption. The ancients believed that there exist "Three Corpses" (San Shi) and "Three Worms" (San Chong) within the human body that cause harm and lead to Lao Zhai. *Zhu Bing Yuan Hou Lun* (Source Book of All Diseases), Volume 23, "Syndromes of Corpse Diseases," states: "The human body naturally contains Three Corpses and various worms, born with us. These worms abhor evil; if provoked, they harm humans. They can communicate with spirits and often attract external pathogens to cause harm. Their manifestations include lethargy and silence, where one does not know the source of suffering but feels discomfort everywhere; or abdominal pain and distension; or protruding masses; or spasms pulling at the waist and spine; or mental confusion." It further identifies the Three Corpses as Fei Shi (Flying Corpse), Dun Shi (Escaping Corpse), and Chen Shi (Sinking Corpse), along with Feng Shi (Wind Corpse) and Shi Zhu (Corpse Transmission, collectively called the Five Corpses) and Fu Shi (Latent Corpse). Daoist belief holds that the Three Corpses are malevolent deities hiding within the human body. On every Geng-Shen day, they report human sins to the Heavenly Gods, damaging physical and mental health. The Upper Corpse is Qing Gu, which attacks the eyes; the Middle Corpse is Bai Gu, which attacks the five zang organs; the Lower Corpse is Xue Gu, which attacks the stomach and life force. When qigong practice reaches a certain level, it can drive away the Three Corpses and promote longevity.
The Three Worms refer to Chang Chong (Ascaris lumbricoides / roundworm), Chi Chong (Fasciolopsis buski / giant intestinal fluke), and Nuo Chong (Enterobius vermicularis / pinworm). These are human parasitic worms. Together with Fu Chong, Bai Chong, Rou Chong, Fei Chong, Wei Chong, and Ruo Chong, they are collectively known as the Nine Worms.
This section proposes two daoyin (guiding and pulling) methods targeting the characteristics of "Lao Zhai disease." One involves embracing the head with both hands, taking long inhalations, and slow exhalations, then sitting down, slowly extending the legs, embracing the knees with hands, lowering the head between the knees, and performing thirteen repetitions of embracing the head. The other involves clenching teeth and swallowing qi. Clenching teeth is also called "Zhuo Chi." In Chapter 19, "Mouth and Teeth Section," of this book, it states: "Method 1: Sit facing east, hold breath for four cycles, clench upper and lower teeth thirty-six times. Treats toothache." It is also believed that regularly clenching teeth "prevents toothache, keeps hair dark and firm, and prevents headaches." The method for clenching teeth can be: first clench molars thirty-six times, then incisors thirty-six times, then interlock teeth to clench canines thirty-six times each, and finally lick the gums three to five times with the tongue. It is best performed after brushing and rinsing in the early morning. It can also be done at any time.