产以血为主，使血乏者难，宜助。
李将军妻病，延先生使视之。先生曰∶“伤身而胎未去。”将军言顷实伤身，胎已去矣。
先生曰∶“案脉胎未去也。”将军不谓然，越日稍瘥。三月后复动，更召先生，先生曰∶“脉
象如前，系双胎。先下者耗血多，故后儿不得出，胎既死，血脉不复归，必干附于母脊。”
乃为施针，并令进汤，果下死胎，且人形已具，色已黑矣。（孙思邈注）
表里相应，二九复生。脓能化毒，不吐肠瘟。
军吏李成苦咳，昼夜不宁，先生诊为肠痈，与以散二剂，令服，即吐脓血二升余，病寻
愈。先生谓之曰∶“后十八年，疾当复发，若不得药，不治。”复分散与之，令宝藏。其后五、
六岁，有里人所患，适与成同，诣成乞药甚殷，成悯而与之。乃知如谯，诣先生更乞，适值
见收，意不忍言。后十八年，成复发，竟以无药死。
按∶肺与大肠相表里，肺疾则大肠之力不足，故便不畅，或便后失力，上无感，下不应
也。若大肠过疾，则肺之鼓动力受阻，故气常不舒，或增咳嗽。干不强，枝亦弱也。先生治
咳嗽，而用吐剂，知其化脓毒，侵于腠理耳。视若甚奇，实则无奇也。（孙思邈注）
身能活脉，何需药石。
按∶先生尝语其门人吴普曰∶“人体欲得劳动，第不当极。动摇则谷气则销，血脉流通，
疾不得生。所谓流水不腐，户枢不蠹也。故古之为导引者，熊颈鸱顾，引挽腰体，动诸关节，
以求不老。吾有一术，名五禽之戏∶一曰虎，二曰鹿，三曰熊，四曰猿，五曰鸟，亦以除疾
，兼利蹄足，以当导引。体有不舒，起作禽戏，怡而汗出，因以着粉，体自轻便，而嗜食。
”普遵行之，行年九十，耳目聪明，齿牙完坚。佗之斯术，盖即得自仙传也。（孙思邈注）
Childbirth is primarily based on blood; if blood is deficient, delivery becomes difficult and should be assisted.
The wife of General Li fell ill and invited the Master (Hua Tuo) to examine her. The Master said, "Your body has been injured and the fetus has not yet been expelled." The General stated that he had indeed suffered an injury recently, but the fetus had already been delivered.
The Master said, "Upon palpating the pulse, the fetus remains." The General did not believe this. A day later, his condition slightly improved. Three months later, symptoms recurred, and he summoned the Master again. The Master said, "The pulse appearance is the same as before; it is a twin pregnancy. The firstborn consumed much blood, which is why the second child could not be born. Since the fetus has died, the blood vessels no longer return to their normal state, and the corpse must have dried and adhered to the mother's spine." He then administered acupuncture and prescribed decoctions. Indeed, a dead fetus was expelled, fully formed in shape but black in color. (Annotation by Sun Simiao)
Exterior and interior correspond with each other; the number of two nines implies regeneration. Pus can resolve toxins and prevent intestinal plague.
Military officer Li Cheng suffered severely from coughing, unable to rest day or night. The Master diagnosed him with intestinal abscess (Chang Yong) and provided two doses of powder for him to take. He immediately vomited over two sheng of pus and blood, and the illness soon resolved. The Master told him, "Eighteen years later, the disease will recur. If you do not obtain medicine, it cannot be cured." He gave him additional powder to store carefully. Five or six years later, a villager fell ill with symptoms identical to Li Cheng's and earnestly begged Li Cheng for medicine. Out of pity, Li Cheng gave it to him. It was then understood that, like in Qiao County, one should seek further advice from the Master. However, at that time, the Master had just been arrested, and Li Cheng felt unwilling to speak of it. Eighteen years later, Li Cheng's illness recurred, and he ultimately died due to lack of medicine.
Note: The Lung and Large Intestine are exterior-interior paired organs. Lung pathology leads to insufficient function of the Large Intestine, resulting in unsmooth defecation or weakness after defecation; if there is no sensation above, there is no response below. Conversely, severe Large Intestine pathology obstructs the driving force of the Lung, leading to frequent Qi stagnation or increased coughing. If the trunk is not strong, the branches will also be weak. The Master treated coughing using emetics because he knew that purulent toxins had invaded the interstitial spaces (Cou Li). Although it may seem peculiar, it is actually nothing extraordinary. (Annotation by Sun Simiao)
If the body can maintain patent blood vessels, why rely on medicinal stones?
Note: The Master once told his disciple Wu Pu, "The human body requires physical activity, but not to the point of extreme exhaustion. Movement facilitates the digestion of grain energy (Gu Qi) and promotes blood circulation, preventing disease generation. As the saying goes, 'Flowing water does not rot, and a door pivot does not get worm-eaten.' Therefore, those in antiquity who practiced Daoyin (guiding and pulling exercises) imitated the bear hanging by its neck and the owl looking back, stretching the waist and body, and moving various joints to seek longevity. I have a technique called the Five Animal Frolics (Wu Qin Xi): the first is Tiger, the second Deer, the third Bear, the fourth Ape, and the fifth Bird. This also serves to eliminate diseases and benefit the limbs, acting as a substitute for Daoyin. When the body feels uncomfortable, rise and perform the animal exercises until sweating pleasantly, then apply powder. The body naturally becomes light and agile, and appetite increases." Wu Pu followed this practice and lived to be ninety years old, with sharp hearing and vision, and complete, firm teeth. Hua Tuo's skill likely originated from immortal transmission. (Annotation by Sun Simiao)