○一因病陟医，苦无统要入门，叔和《脉诀》、东垣《药性》、《编注病机》、《医方快捷方式》、《医学
权舆》，非不善也，然皆各自成帙，有所不便，《伤寒论》、《活人书》、《百问歌》，非不美也，然非幼
读不能成诵；《医经国小》法全辞略，真可以入门也，而《局方》又有所未备，且意太简古，学人亦难了悟。
是以少瘥，将前数书合并成帙，中分内外。内集详于运气、经络、针灸、脉、药，外集详于温暑、伤寒、内伤、
杂病、方论。医能知此内外门户，而后可以设法，治病不致徇象执方，夭枉人命，故题之曰《医学入门》。
○一阴骘，病家元气，医家本领。国朝为善阴骘，当时置一册座右，则意向自别。
○保养以助药力，若专恃药而不知养性，则药亦难效。古人皆先养性，不愈而后服药，故纂《素问》及丹
溪二说于前，而附以己意，断之于后。
○运气理微，一遵《素问》、《灵枢》及各名家要括。
○历代名医姓氏，上古者遵名医图及原医药性，俾人知所自而不忘其本也；汉唐以后名家纂《医林史传》、
《外传》而载其治验，俾人知所法也。
○经络，修明堂仰人伏人图歌，而注以《内经》。寸数穴法主治，与《铜人针灸经》及徐氏、庄氏皆同。
○脏腑遵《素》、《难》，兼采华佗《内照》、《编注药性》等书。
○灸必根据古，针学曾受五家手法，取其合于《素》、《难》及徐氏、何氏，录之以备急用。
○形色脉诀，遵《素》、《难》及《医经国小》、《脉经》、《脉图》、《权舆》、《脉诀》。
○本草用《医经国小》及《快捷方式》、《释药》、《集韵》，得《大观》旨也，更采《集要》等书，注其未
备。
○温暑全纂刘河间《原病式》。
○伤寒以陶氏《六书》为主，并入《伤寒论注》及《活人书》、《百问》、《百证》、王氏《家宝》、
《仁斋直指》等书，而其分段次序，用《活人赋》改补，拆为病机、用药二篇，则愚之管见也。后阅《溯洄集》
所论次序颇同，惜其未暇编耳。
○内伤纂东垣并各名家而编次之。
○杂病窃危氏《得效方》意，及丹溪用药总法，而提其风、寒，暑、湿、燥、火、气、血、痰、郁大纲
于前，稍从《丹溪附余》，小目分类于后。其歌括一以《快捷方式》、《权舆》为主而改补之，更用《玉机微义》、
《袖珍》、《仁斋直指》、万氏等方分注于下。
○女科以《妇人良方》为主及参名家。
○小儿以《仁斋》为主，并《安老怀幼》书，痘疹以《医学正传》为要，并《仁斋》、陈氏、魏氏、闻人氏
三要等书。
○外科以《外科枢要》为主。
○治法集古而去其重复耳。
○杂病用药赋及古方诗括，根据《仁
斋》、《快捷方式》而修补之。凡病机注下有方名而无药品，又不书见何门，必见伤寒杂病用药赋与古方诗括，或
本草注，目录可查。
○正方名，凡单方如抑青丸，则改为单黄连丸。二味者加一古字于上，所以遵神农也。三味者如三补丸，
改为黄连黄芩黄柏丸，若黄连为君，则先连次芩、柏，汤药亦然，所以效仲景也。又如四君子之类，加一二味便
易其名者，则去其新立名目，只云即四君子汤加某药。又有君臣佐使，以多者为君，合以君药立名，中间有以
臣药及佐使药立名者，悉易之。凡此皆厌方之太多而理益湮塞，又令人易记也。其间有二十四五味以上者，决不录
入，盖太杂太多，非神农本意。又下以药味为名者，下却更不载其药，如芎辛汤，白术甘草水煎，下更不载芎、
辛二药。
○歌括多有一句两读者，大字既可成句，又可接下小注成一句者，多是汤散名字。大字止载其名，汤散二
字注下，凡此皆省字故耳。虽然欲简省者，心也；不能省而简HT 八九帙者，学之无要而依样画成，聊为初学入
门。若大方专精，徒为嗤笑之资云。
○ 因为生病而寻求医生，苦于没有统摄要领、便于入门的书籍。叔和的《脉诀》、李东垣的《药性》、《编注病机》、《医方快捷方式》、《医学权舆》，并非不好，但都各自成书，有所不便；《伤寒论》、《活人书》、《百问歌》，并非不美好，但如果不从小诵读就不能背诵；《医经国小》方法全面且文辞简略，真正可以作为入门书，但《太平惠民和剂局方》又有不足之处，而且意思过于简古，学习者也难以领悟。因此，在病情稍愈后，我将前述几本书合并成册，中间分为内、外两集。内集详细论述运气（五运六气）、经络、针灸、脉诊、药物；外集详细论述温病、暑病、伤寒、内伤、杂病及方论。医生若能知晓这些内外门户，之后才能制定治疗方法，治病不至于拘泥于表象或死守方剂，从而枉害人命，所以题名为《医学入门》。
○ 阴骘（暗中行善积德），是病家的元气，也是医家的本领。本朝提倡为善积德，当时在座右放置一册相关书籍，那么意向自然会有所不同。
○ 保养身体以辅助药力，如果只依赖药物而不知道调养性情，那么药物也难以见效。古人都先调养性情，若无效后再服药，所以在前面编纂了《素问》及朱丹溪的两家学说，并附上自己的见解，在最后进行判断。
○ 五运六气的道理精微，完全遵循《素问》、《灵枢》及各名家的重要摘要。
○ 历代名医的姓氏，上古时期遵循《名医图》及原医药性著作，使人们知道其来源而不忘记根本；汉唐以后的名家编纂《医林史传》、《外传》来记载他们的治疗验案，使人们知道效法的对象。
○ 经络部分，修订了明堂穴位的仰人、伏人图歌诀，并注释以《内经》的内容。寸数穴位的主治方法，与《铜人针灸经》以及徐氏、庄氏的观点都相同。
○ 脏腑部分遵循《素问》、《难经》，兼采华佗的《内照》、《编注药性》等书。
○ 灸法必定依据古籍，针法曾受教于五家手法，选取符合《素问》、《难经》以及徐氏、何氏观点的，记录下来以备紧急使用。
○ 望色、察形、脉诊口诀，遵循《素问》、《难经》及《医经国小》、《脉经》、《脉图》、《医学权舆》、《脉诀》。
○ 本草（药物学）使用《医经国小》及《医方快捷方式》、《释药》、《集韵》，领会《大观本草》的宗旨，更采集《集要》等书，注释其中未完备之处。
○ 伤寒以陶华（陶节庵）的《六书》为主，并入《伤寒论注》及《活人书》、《百问》、《百证》、王肯堂的《家宝》、《仁斋直指》等书，而其分段次序，采用《活人赋》修改补充，拆分为病机、用药两篇，这是我的浅见。后来阅读《溯洄集》所论述的次序颇为相同，可惜他没时间编纂罢了。
○ 杂病窃取了危亦林《得效方》的意旨，以及朱丹溪用药的总体法则，而在前面提出风、寒、暑、湿、燥、火、气、血、痰、郁的大纲，稍微参照《丹溪附余》，在后面进行小目的分类。其中的歌诀完全以《医方快捷方式》、《医学权舆》为主进行修改补充，更用《玉机微义》、《袖珍方》、《仁斋直指》、万密斋等方的内容分别注释在下面。
○ 妇科以《妇人良方》为主，并参考各家名家著作。
○ 儿科以《仁斋直指小儿方论》为主，并参合《安老怀幼》一书，痘疹以《医学正传》为主要参考，并参合《仁斋直指》、陈氏、魏氏、闻人氏三要等书。
○ 治疗方法汇集古人经验而去除了重复的内容。
○ 杂病用药赋及古方诗诀，根据《仁斋直指》、《医方快捷方式》而修补。凡是病机注释下只有方名而没有药品，又不注明见于哪一门的，必定要在《伤寒杂病用药赋》与《古方诗诀》，或本草注释中查找，目录可以查阅。
○ 关于正方名称，凡单方如抑青丸，则改为单黄连丸。两味药的在上面加一个“古”字，这是为了遵循神农氏的本意。三味药的如三补丸，改为黄连黄芩黄柏丸，如果黄连为君药，则先写连翘（此处原文为“连”，指黄连之省称或笔误，依上下文应为黄连，但前文已列黄连，故此处“先连”可能指代顺序，结合后文“次芩、柏”，应理解为按君臣佐使或药味排列，通常黄连为君则先列黄连，但原文说“改为黄连黄芩黄柏丸...若黄连为君，则先连次芩、柏”，逻辑上略有重复，意指命名时体现君药地位或特定排序），汤药也是如此，这是为了效仿张仲景。又如四君子汤之类，增加一两味药便容易改变其名称的，则去掉新立的名称，只说即四君子汤加某药。又有君臣佐使，以数量多者为君，结合君药立名，中间有以臣药及佐使药立名的，全部更改。所有这些都是因为厌恶方剂名称太多而导致医理更加闭塞，又让人容易记忆。其中有二十四五味以上的方剂，绝不录入，因为太杂乱太多，不符合神农氏的本意。又有以下面药味命名的方剂，下面却不记载其药物，如芎辛汤，白术甘草水煎，下面不再记载川芎、细辛二药。
○ 歌诀中多有一句两读的，大字既可以成句，又可以接下小注成一句的，多是汤剂散剂的名字。大字只记载其名，汤散二字注在下面，这些都是为了节省文字的缘故。虽然想要简省的是心意；不能简省而简化成八九册书的，是因为学习没有要领而依样画葫芦，姑且作为初学者的入门书。如果是大方专精之作，只会成为被人嗤笑的材料罢了。
○ Because of illness and seeking medical help, I suffered from the lack of a comprehensive yet accessible introductory text. He Shao's *Mai Jue* (Pulse Rhymes), Li Dongyuan's *Yao Xing* (Properties of Medicinals), *Bian Zhu Bing Ji* (Annotated Pathogenesis), *Yi Fang Kuai Jie Fang Shi* (Quick Reference for Medical Formulas), and *Yi Quan Yu* (Medical Origins) are not without merit; however, each exists as a separate volume, causing inconvenience. *Shang Han Lun* (Treatise on Cold Damage), *Huo Ren Shu* (Book that Saves People), and *Bai Wen Ge* (Song of Hundred Questions) are not without beauty; yet, they cannot be memorized unless studied from childhood. *Yi Jing Guo Xiao* (Small Book of Medical Classics) offers complete methods with concise language, truly suitable for beginners, but *Ju Fang* (Formulary of the Bureau of Pharmacy) has omissions, and its meaning is too archaic and simple, making it difficult for learners to comprehend. Therefore, upon recovering slightly, I merged the aforementioned books into one volume, divided internally into two sections: Internal and External. The Internal section details Yun Qi (Five Movements and Six Qi), meridians, acupuncture, pulse diagnosis, and materia medica. The External section details warm diseases, summerheat diseases, cold damage, internal injury, miscellaneous diseases, and formula discussions. Once physicians understand these internal and external frameworks, they can then formulate treatment strategies, avoiding rigid adherence to symptoms or formulas that might lead to premature death. Hence, the title *Yi Xue Ru Men* (Introduction to Medicine).
○ Yin Zhi (Secret Virtue/Accumulating Merit through Unseen Good Deeds) constitutes the vital energy (Yuan Qi) of the patient and the core competence of the physician. In our dynasty, promoting secret virtue was emphasized; keeping a book on this topic by one's writing desk would naturally refine one's intentions.
○ Physical maintenance aids medicinal efficacy. Relying solely on drugs without cultivating one's nature renders medicines less effective. Ancients prioritized nurturing their nature first, resorting to medication only if necessary. Thus, I compiled teachings from *Su Wen* (Basic Questions) and Zhu Danxi at the beginning, appended my own views, and concluded with judgments.
○ The principles of Yun Qi (Five Movements and Six Qi) are subtle; I strictly followed *Su Wen*, *Ling Shu* (Spiritual Pivot), and summaries from various masters.
○ Regarding surnames of famous doctors throughout history: for ancient times, I followed *Ming Yi Tu* (Illustrated List of Famous Physicians) and original materia medica texts, so people know their origins and do not forget their roots. For the Han and Tang dynasties onwards, I compiled *Yi Lin Shi Zhuan* (Biographies of Doctors in the Forest of Medicine) and *Wai Zhuan* (External Biographies) to record their successful treatments, so people know whom to emulate.
○ For meridians, I revised the songs for Ming Tang acupoints (anterior/posterior views) and annotated them with content from *Nei Jing* (Inner Canon). The cun measurements, point methods, and indications align with *Tong Ren Zhen Jiu Jing* (Bronze Man Acupuncture and Moxibustion Classic) and the works of Xu and Zhuang.
○ For zang-fu organs, I followed *Su Wen* and *Nan Jing* (Classic of Difficult Issues), incorporating Huatuo's *Nei Zhao* (Internal Reflection) and *Bian Zhu Yao Xing* (Annotated Properties of Medicinals).
○ Moxibustion strictly follows ancient texts. Acupuncture techniques were learned from five masters, selecting those consistent with *Su Wen*, *Nan Jing*, and the schools of Xu and He, recorded here for emergency use.
○ Observing complexion, form, and pulse rhymes follow *Su Wen*, *Nan Jing*, *Yi Jing Guo Xiao*, *Mai Jing* (Pulse Classic), *Mai Tu* (Pulse Diagrams), *Yi Quan Yu*, and *Mai Jue*.
○ Materia Medica utilizes *Yi Jing Guo Xiao*, *Yi Fang Kuai Jie Fang Shi*, *Shi Yao* (Explanation of Medicinals), and *Ji Yun* (Collected Rhymes), grasping the essence of *Da Guan Ben Cao* (Great View Materia Medica), while supplementing with *Ji Yao* (Essential Collection) and other texts to annotate deficiencies.
○ Warm and Summerheat diseases are entirely compiled from Liu Hejian's *Yuan Bing Shi* (Original Treatise on Disease Causes).
○ Cold damage primarily relies on Tao Hua's *Liu Shu* (Six Books), integrating *Shang Han Lun Zhu* (Annotation of Treatise on Cold Damage), *Huo Ren Shu*, *Bai Wen*, *Bai Zheng*, Wang Kentang's *Jia Bao*, and *Ren Zhai Zhi Zhi*, among others. The segmentation and order were modified using *Huo Ren Fu* (Ode to Saving People), splitting into two chapters: Pathogenesis and Medication. This is my humble opinion. Later, reading *Su Hui Ji* (Collection of Tracing Back), I found similar discussions on order, regretting that he did not have time to compile it.
○ Internal injuries are compiled from Li Dongyuan and various masters, arranged systematically.
○ Miscellaneous diseases borrow the intent from Wei Yilin's *De Xiao Fang* (Effective Formulas) and Zhu Danxi's general medication principles. I presented the main outlines of Wind, Cold, Summerheat, Dampness, Dryness, Fire, Qi, Blood, Phlegm, and Stagnation at the front, and classified sub-categories at the back, slightly referencing *Dan Xi Fu Yu*. The songs rely mainly on *Yi Fang Kuai Jie Fang Shi* and *Yi Quan Yu*, supplemented with annotations from *Yu Ji Wei Yi*, *Xiu Zhen Fang*, *Ren Zhai Zhi Zhi*, and Wan Mi's formulas.
○ Gynecology primarily uses *Fu Ren Liang Fang* (Good Formulas for Women), consulting various masters.
○ Pediatrics primarily uses *Ren Zhai* (referring to *Ren Zhai Zhi Zhi Xiao Er Fang Lun*), combined with *An Lao Huai You*. For smallpox and measles, *Yi Xue Zheng Zhuan* (Correct Transmission of Medicine) is essential, along with *Ren Zhai*, Chen, Wei, and Wenren's "Three Essentials."
○ Surgery primarily uses *Wai Ke Shu Yao* (Essentials of Surgery).
○ Treatment methods collect ancient practices, removing repetitions.
○ The ode on medication for miscellaneous diseases and poems summarizing ancient formulas are repaired based on *Ren Zhai* and *Yi Fang Kuai Jie Fang Shi*. If a pathogenesis note lists a formula name but no ingredients, nor indicates which section it belongs to, one must refer to the Ode on Medication for Cold Damage/Miscellaneous Diseases, Ancient Formula Poems, or Materia Medica notes; the index allows checking.
○ Regarding standard formula names: Single-ingredient formulas like *Yi Qing Wan* are renamed *Dan Huang Lian Wan* (Single Coptis Pill). Two-ingredient formulas add the character "Gu" (Ancient) at the beginning, respecting Shennong. Three-ingredient formulas like *San Bu Wan* are renamed *Huang Lian Huang Qin Huang Bai Wan* (Coptis, Scutellaria, Phellodendron Pill); if Coptis is the sovereign herb, it is listed first, followed by Scutellaria and Phellodendron. Decoctions follow the same rule, emulating Zhang Zhongjing. For formulas like *Si Jun Zi Tang* (Four Gentlemen Decoction), if one or two herbs are added, the new name is discarded, simply stating "Si Jun Zi Tang plus [Herb]." For formulas with Sovereign, Minister, Assistant, and Courier roles, the ingredient with the largest quantity is considered the Sovereign, and the name is derived from it. Any intermediate naming based on Ministers or Assistants/Couriers is changed. All these changes aim to reduce the proliferation of formula names, which obscures medical principles, and to aid memory. Formulas with more than twenty-four ingredients are excluded as they are too complex, contrary to Shennong's intent. Formulas named after ingredients (e.g., *Xiong Xin Tang*) where the ingredients are not listed below (e.g., cooked with Atractylodes and Licorice, excluding Ligusticum and Asarum) are handled specifically.
○ Songs often contain lines read in two ways: large characters forming a line, or continuing into small notes to form a line, usually indicating decoction or powder names. Large characters list only the name, with "Decoction/Powder" noted below, saving space. While the desire for brevity is good, reducing extensive volumes to eight or nine fascicles due to a lack of essential learning principles results in mere imitation. This serves merely as an introduction for beginners. For specialized, grand works, such simplification would only invite ridicule.