痘，豆也，形似也。豆为肾之谷，而痘之根源，亦起于肾，义同也。人之结胎，由父精母血而成，是交感
之淫火，为痘之根源，藏于肾者。人之成形，先有两肾，犹瓜实果种之两叶。痘之出也，有循行之脉道，从脉
道而出为顺，不从脉道而出为逆。脉道者何？心包络是也。心包之络，主血、主脉，遍行周身。其毒从阴出阳，
由下而上，冲击心包，从心包而走经脉，从经脉而出皮肤，夫冲击心包，故必先发惊搐；从经脉而出皮肤，故
续出而不骤；从心包而走经脉，故化血以成浆。如是，痘虽稠密，亦必收功。如不从心包之脉道而出，则随三
焦之气，以走肌腠，从肌腠而出皮肤，为逆而险矣。夫心包主脉，脉者，阴血也；三焦主气，气者，阳气也。
随心包血脉而出，则出之有渐，化血为脓，顺之证也；从三焦气分而出，则出之无渐，不能化血为脓，必至肉
肿而痘不肿，气至而血不随，根窠不敛，界限不分，或扁大空仓，或碎杂紫艳，或阴寒灰白，则为逆矣。盖毒
走经脉，则三焦和，而为胃外之然，自能进食；如毒走三焦，则三焦病，而不能为胃外之然，自不能进食。
故痘出顺逆，有一定循行之道，医者当静以观之，不可妄投以药。若
与药，盒饭泄肾毒而通经脉，毒盛则先泄之，毒不盛则导之引之，使从经脉而出。此为治之之法也，苟不知
此，而处方投剂，落方书之窠白，大攻、大凉，非所以治之，适所以害之也。余为此言，乃一定不易之理，
无甚奇也。医者不知人身经脉气血之道，阴阳交会之理，见惊悸，则曰心经痘；咳嗽，则曰肺经痘；扁大，
则曰脾经痘；红润圆绽，则曰肝经痘；灰紫不起，则曰肾经痘∶于是攻发虚其肌表，寒凉乱其经脉。常见
痘之密而顺者，遇儿医而必重，重则危，危则死矣。未闻痘之逆者，遇儿医而能收功者也。尝观乡村穷谷
之中，医药少有，痘之生者常多；省会城市之内，医药最多，痘之死者大半。岂非治而致死之明验欤！
痘，就是豆的意思，形状相似。豆是肾所主的谷物，而痘的根源也起于肾，道理相同。人形成胎儿，是由父亲的精和母亲的血结合而成，这种交感时的相火（指人体正常的生理之火或病理性的虚火），作为痘的根源，藏在于肾中。人形成形体时，先有两肾，就像瓜果种子中的两片子叶。痘发出来时，有循行的脉道，从脉道发出为顺证，不从脉道发出为逆证。什么是脉道？就是心包络（保护心脏的外围组织）。心包的络脉，主管血液、主管脉管，遍布全身。痘毒从阴分出于阳分，由下向上，冲击心包，从心包进入经脉，再从经脉透出皮肤。因为冲击心包，所以必须先出现惊厥抽搐；因为从经脉透出皮肤，所以痘疹陆续发出而不突然爆发；因为从心包进入经脉，所以能化血变成脓浆。像这样，即使痘疹稠密，也一定能收功痊愈。如果不从心包的脉道发出，而是随着三焦（主持诸气，疏通水道）的气机，走向肌肉腠理（肌肉间隙），从肌腠透出皮肤，这就是逆证且危险了。心包主管脉，脉就是阴血；三焦主管气，气就是阳气。随心包的血脉发出，则发出有渐进过程，化血为脓，这是顺证；从三焦的气分发出，则发出没有渐进过程，不能化血为脓，必然导致肌肉肿胀而痘不肿，气到了而血不跟随，痘根不收敛，界限不分清，或者扁平宽大如空仓，或者破碎杂乱紫艳，或者因阴寒而呈灰白色，这就属于逆证了。大概痘毒走经脉，则三焦调和，就能成为胃之外的腐熟功能（指消化能力），自然能进食；如果痘毒走三焦，则三焦生病，不能成为胃之外的腐熟功能，自然不能进食。所以痘发出的顺逆，有一定的循行道路，医生应当冷静观察，不可乱投药物。如果用药，应当泻肾毒并通利经脉，毒盛则先泻之，毒不盛则引导它，使其从经脉发出。这是治疗的方法，如果不知道这些，而随意处方用药，落入方书的窠臼，大用攻下、大用寒凉，这不是治疗的方法，反而有害。我说的这些话，是确定不变的真理，并不新奇。医生不了解人身经脉气血的运行规律、阴阳交会之理，见到惊悸，就说这是心经痘；咳嗽，就说这是肺经痘；扁平宽大，就说这是脾经痘；红润圆绽，就说这是肝经痘；灰紫不起，就说这是肾经痘：于是用攻发表邪药使肌表虚弱，用寒凉药扰乱经脉。常见痘密且顺的患儿，遇到儿科医生治疗反而病情加重，加重则危险，危险则死亡。没听说过痘为逆证的患儿，遇到儿科医生能治愈的。曾观察乡村穷谷之中，医药很少，患痘存活的人常多；省会城市之内，医药最多，患痘死亡的人占大半。这难道不是治疗反而致死的明显证据吗！
Dou (Smallpox/Chickenpox), meaning "bean," is named for its shape resembling a bean. Beans are the grain associated with the Kidney, and the root cause of Dou also originates from the Kidney; the principle is the same. The formation of a fetus in humans results from the union of the father's essence and the mother's blood. This "Yin Fire" (referring to the physiological fire or pathological deficiency fire involved in conception) serves as the root cause of Dou and resides within the Kidney. When the human form takes shape, the two Kidneys appear first, analogous to the two cotyledons of a melon or fruit seed. When Dou erupts, it follows specific meridians (Meridians). Eruption via these meridians constitutes a favorable condition (Shun), while eruption outside them constitutes an unfavorable condition (Ni). What are these meridians? They refer to the Pericardium Luo (Collaterals of the Pericardium). The collaterals of the Pericardium govern blood and vessels, circulating throughout the body. The pathogenic toxin moves from the Yin aspect to the Yang aspect, ascending from below, impacting the Pericardium, entering the meridians from the Pericardium, and finally emerging onto the skin from the meridians. Because it impacts the Pericardium, convulsions and fright (Jing Chu) must occur first; because it emerges from the meridants onto the skin, the eruptions appear gradually rather than suddenly; because it travels from the Pericardium into the meridians, it transforms blood into pus (Jiang). In such cases, even if the eruptions are dense, recovery will be achieved. If it does not emerge via the Pericardium's meridians but instead follows the Qi of the Sanjiao (Triple Burner) to travel through the muscle-couli (Muscle Intercellular Spaces), emerging from the couli onto the skin, this is an unfavorable and dangerous condition. The Pericardium governs the vessels, and vessels constitute Yin Blood; the Sanjiao governs Qi, and Qi constitutes Yang Qi. Emerging via the Pericardium's blood vessels allows for a gradual emergence, transforming blood into pus, which characterizes a favorable syndrome. Emerging via the Qi aspect of the Sanjiao results in no gradual process, inability to transform blood into pus, leading inevitably to swollen flesh but non-swollen eruptions, where Qi arrives but Blood does not follow, the roots do not contract, and boundaries are indistinct. The eruptions may become flat and wide like an empty granary, fragmented and mixed with purple brilliance, or grayish-white due to Yin Cold; these are all unfavorable conditions. Generally, when the toxin travels through the meridians, the Sanjiao harmonizes, enabling the stomach's external digestive function (Ran Gu), allowing natural appetite; if the toxin travels through the Sanjiao, the Sanjiao becomes diseased, failing to support the stomach's digestive function, resulting in loss of appetite. Therefore, the favorable or unfavorable nature of Dou eruption follows a fixed pathway. Physicians should observe calmly and must not administer medication recklessly. If medication is used, it should drain Kidney toxins and unblock the meridians. If the toxin is abundant, it should be purged first; if not abundant, it should be guided and directed to emerge via the meridians. This is the method of treatment. Ignoring this and prescribing blindly, falling into the clichés of medical texts by using heavy purgatives or heavy cooling agents, is not treatment but harm. These words I speak represent immutable truths, nothing extraordinary. Physicians who do not understand the pathways of meridians, Qi, and Blood, nor the principles of Yin-Yang intersection, will diagnose: if there is fright and palpitations, it is Heart Meridian Dou; if coughing, Lung Meridian Dou; if flat and wide, Spleen Meridian Dou; if red, round, and blooming, Liver Meridian Dou; if gray-purple and depressed, Kidney Meridian Dou. Consequently, they use attacking and releasing methods that weaken the muscular exterior and use cold-cooling methods that disrupt the meridians. It is common to see that children with dense yet favorable Dou, when treated by pediatric specialists, suffer worsening conditions; worsening leads to danger, and danger leads to death. It has never been heard that children with unfavorable Dou can recover when treated by pediatric specialists. Observing rural valleys where medicine is scarce, many with Dou survive; whereas in provincial capitals where medicine is most abundant, the majority of those with Dou die. Is this not clear evidence that treatment leads to death!