鱼口便毒，生于小腹下两腿合缝之间，左为鱼口，右为便毒，属厥阴肝经。此证得之奔
走劳役，湿热下注者少；惟交感不洁，遭淫毒而患者为最多。每每先起下疳，下疳未已，便
毒继之，此湿热秽毒之为患也。亦有强力入房，忍精不泄，或欲念不遂，以致败精搏血，留
聚经隧，壅遏而成者，临证当细为审辨。治法惟宜开郁散气、清利湿热。而毒邪之证，先宜
发汗，次利小便，使毒从肤腠而出，或从小便而泄；发汗利便不应者，乃以破毒活血调气之
剂攻之，俟毒瓦斯宣通，随以补剂托之，此定法也。凡妇人患此者，多在两 肿痛，或腹
中结块，小腹痞闷，上攻两胁，小便涩滞，憎寒壮热，多由肝经湿热下注，或郁怒伤损肝脾
所致。宜用龙胆泻肝汤、加味逍遥散之属，不可概投散血攻毒之剂。又小儿亦有此证，总由
肝经热毒，治宜泻肝，再视血分毒瓦斯，为之斟酌。
夫痘者，系先天之毒所发；而痘毒者，是毒发未尽，而复结为痈也。人之有生，受气于
父，成形于母，当父母媾精之时，惟恃一点真元之火，相为凝结，是胎元之初成，即胎毒之
蕴蓄，故名之曰胎毒。此毒潜伏命门，至受生以后，有触即发，无触则不发，故其发有迟速
，有数月而即发者，有数岁而始发者，更有十余岁而后发者。当其未发时，形气俱泯，无可
端倪，若未燧之火，何处寻觅？又何可解释？及其有触而发，则勃然不可御。盖其毒瓦斯动于命
门，发自五脏，实动五脏真气，斯时全赖血气送毒外出，运化之而成浆，收结之而成痂，而
后其毒始尽，脏腑可安。若或血气衰弱，浆水不足，不能尽送毒瓦斯外出，虽痘疮已愈，而遗
毒之未尽者，不免结为痈疡，而痘毒生焉已。然痘毒之生也，发于时痘后者轻，发于种痘后
者重，何则？时痘感时行之邪，触动胎元之毒而发，故其为痘证也重，而毒能尽泄，痘后即
或生疡，不过痘、痈、疔、疖而已。至种痘则外无天行时邪，祗借些微痘苗之气，以引胎元
之毒，故其为痘证也轻，痘出之后，余毒未能尽泄，而发为痘毒，纯是先天火邪所结，所以
溃脓腐烂，未能速愈也。且余毒必发于节骱，盖以痘未结痂，火毒未泄，走入络中，故或发
于肘腕，或生于膝胫，起则漫肿，寒热潮热，烦躁口干成脓。溃后若小儿先天禀足，气实壮
强者，即可数日收功；其或正亏，余毒攻络者，即名气虚毒滞，穿溃后每难收口。总须胃强
脾旺，气血充盈，始可无妨。如体怯少纳，或脾泄便溏，或潮热不退，即成损怯矣。要知此
疡起时，若 红漫肿，寒热交作者，当从实证治，宜清火解毒。起时如色白漫肿，缓于成功
作脓者，当以虚证治，即用补托。如溃后不收敛者，当以虚痰治；若止用清火解毒之剂，使
脾胃受戕，乳食不贪，微热不退，致成损怯而毙者多矣。此不可不辨也。
鱼口便毒，生长在小腹下方、两腿内侧接缝处，左侧称为鱼口，右侧称为便毒，归属于厥阴肝经。此病多因奔走劳役、湿热下注所致者较少；大多是因为房事不洁，感染淫秽毒邪而患病。常常先出现下疳（生殖器溃疡），下疳未愈，便毒随即发生，这是湿热秽毒为害的结果。也有因强力行房、忍精不泄，或欲望未能满足，导致败精与瘀血搏结，滞留于经络隧道，壅塞阻滞而形成的，临证时应当仔细辨别。治疗方法适宜疏肝解郁、行气散结、清利湿热。对于毒邪之证，起初宜用发汗法，其次通利小便，使毒邪从皮肤毛孔排出，或通过小便排泄；若发汗和利小便无效，则使用破毒活血、调理气机的方剂进行攻逐，待毒气宣通后，随即用补益剂托毒外出，这是固定的法则。凡是妇女患此病，多在两侧大腿根部肿痛，或腹部有结块，小腹痞闷胀满，疼痛上攻至两胁，小便涩滞不畅，憎寒壮热，多由肝经湿热下注，或因郁怒损伤肝脾所致。适宜使用龙胆泻肝汤、加味逍遥散这类方剂，不可一概投用散血攻毒的药剂。另外小儿也有此证，总归是肝经热毒，治疗宜泻肝火，再根据血分毒气的情况斟酌用药。
所谓痘，是由先天胎毒发作而成；而痘毒，是指痘毒未完全发散，又重新凝结成痈肿。人之所以生存，受气于父亲，成形于母亲，在父母交合之时，全凭一点真元之火相互凝结，因此胎元初成时，即蕴蓄了胎毒，所以称之为胎毒。这种毒潜伏在命门，出生后，遇到诱因就发作，没有诱因就不发作，所以发作有快有慢，有的几个月就发作，有的几岁才发作，更有十几岁以后才发作的。当它未发作时，形体和气机都隐匿不见，没有端倪可寻，就像未点燃的火种，去哪里寻找？又怎么可以解释呢？等到受到触动而发作，则猛烈得不可抵御。大概因为毒气动于命门，发自五脏，实际上动摇了五脏的真气，此时全靠气血将毒送出体外，运化而成脓浆，收结而成痂皮，然后毒才能排尽，脏腑得以安宁。如果气血衰弱，浆水不足，不能将毒全部送出体外，虽然痘疮已经愈合，但残留的毒未尽，不免凝结成痈疡，于是产生了痘毒。然而痘毒的产生，发生在自然出痘之后的较轻，发生在人工种痘之后的较重。为什么呢？自然出痘是感受时行之邪，触动胎元之毒而发作，所以作为痘证来说病情重，但毒能完全发泄，痘后即使生疡，也不过是普通的痘、痈、疔、疖而已。至于人工种痘，外无天行时邪，只借助微弱的痘苗之气，来引出胎元之毒，所以作为痘证来说病情轻，痘出之后，余毒未能完全发泄，从而发展为痘毒，纯粹是先天火邪凝结所致，所以溃烂流脓，难以迅速痊愈。而且余毒必定发作于关节部位，因为痘未结痂，火毒未泄，流入络脉中，所以有的在肘腕发作，有的在膝胫生长，起病时漫肿，伴有寒热往来、潮热、烦躁口干，最终成脓。溃破后，如果小儿先天禀赋充足，气实强壮，就可以数日见效；如果正气亏损，余毒攻入络脉，这就叫气虚毒滞，穿溃后往往难以收口。总之必须胃强脾旺，气血充盈，才可以无碍。如果身体虚弱、食欲减退，或者脾虚泄泻、大便稀溏，或者潮热不退，就会形成虚损怯弱之症。要知道此疡初起时，如果红肿漫肿，寒热交替发作的，应当按实证治疗，适宜清热泻火解毒。初起时如果色白漫肿，缓慢成脓的，应当按虚证治疗，即用补益托毒之法。如果溃破后不收敛的，应当按虚痰治疗；如果只用清热泻火解毒的药剂，使脾胃受损，食欲不振，微热不退，导致形成虚损怯弱而死亡的很多。这是不可不辨别的。
Yukou Biandu (Fish Mouth and Common Swelling), located between the lower abdomen and the inner seam of the thighs, is called Yukou on the left and Biandu on the right. It belongs to the Jueyin Liver Meridian (Jueyin Gan Jing). This condition is rarely caused by strenuous labor and damp-heat sinking downward; it is most commonly contracted through unclean sexual intercourse and exposure to venereal toxins. Often, chancre (Xiagan) appears first, and if not healed, Biandu follows, which is a manifestation of damp-heat and foul toxins. In other cases, it results from excessive sexual activity, retaining semen without ejaculation, or unfulfilled desires, causing stale essence and blood to bind together, stagnate in the meridians, and form due to obstruction. Clinical differentiation must be meticulous. The treatment principle should focus on resolving depression, dispersing qi, and clearing damp-heat. For toxin-related conditions, sweating (Fa Han) should be induced first, followed by promoting urination, allowing toxins to exit via the skin pores or urine. If these methods fail, formulas that break toxins, invigorate blood, and regulate qi should be used to attack the pathogen. Once the toxic qi is unblocked, tonifying agents should be employed to support the body and expel toxins; this is a fixed protocol. In women, this disease often presents with swelling and pain in both groin areas, abdominal masses, lower abdominal distension, pain radiating to the hypochondrium, dysuria, aversion to cold with high fever. These are mostly due to damp-heat sinking in the Jueyin Liver Meridian or liver-spleen damage from depression and anger. Formulas such as Longdan Xiegan Tang (Gentian Liver-Draining Decoction) and Jiawei Xiaoyao San (Modified Free Wanderer Powder) are appropriate. One should not indiscriminately use blood-dispersing and toxin-attacking agents. Children may also suffer from this condition, generally due to heat-toxin in the Liver Meridian. Treatment should involve draining the Liver, adjusting based on the toxin status in the Blood level.
"Dou" (Smallpox/Varicella-like eruption) originates from congenital toxins. "Doudou" (Smallpox Toxin) refers to residual toxins that have not fully expressed themselves and subsequently condense into abscesses. Human life receives Qi from the father and forms shape from the mother. At the time of conception, relying on a spark of true Yuan Fire, the initial formation of the fetal origin inherently harbors fetal toxins, hence termed "Fetal Toxin." This toxin lies dormant in the Mingmen (Gate of Life). After birth, it erupts upon contact with triggers; without triggers, it remains latent. Thus, its onset varies: some erupt within months, others after years, and even after ten-plus years. Before eruption, its signs are indistinguishable, like an unlit fire—where to find it? How to explain it? Once triggered, it erupts violently and cannot be restrained. The toxin moves from the Mingmen, emanates from the Five Zang Organs, and actually disturbs the True Qi of the Five Zang. At this stage, success relies entirely on Qi and Blood sending the toxin outward, transforming it into pus, and consolidating it into scabs. Only then is the toxin exhausted, and the Zang-Fu organs restored. If Qi and Blood are weak, and pus fluid insufficient, the toxin cannot be fully expelled. Even if the eruptions heal, residual toxins remain, condensing into sores and ulcers, thus generating Doudou. However, Doudou arising after natural smallpox is mild, while that after inoculation is severe. Why? Natural smallpox is caused by seasonal epidemic pathogens triggering fetal toxins; although the syndrome is severe, the toxin is fully vented. Any subsequent sores are merely ordinary smallpox, carbuncles, furuncles, or boils. In contrast, inoculation lacks external epidemic pathogens, relying only on the slight Qi of the vaccine material to draw out fetal toxins. Thus, the smallpox syndrome is mild, but residual toxins remain unvented, developing into Doudou, purely formed by congenital Fire Evil. Hence, suppuration and rotting occur, and healing is slow. Moreover, residual toxins inevitably manifest at joints. Because the scabs have not formed and Fire-Toxin has not been vented, it enters the collaterals. Thus, it may appear at elbows and wrists, or knees and shins. Onset features diffuse swelling, alternating chills and fever, tidal fever, irritability, dry mouth, and eventual suppuration. After ulceration, if the child has strong congenital endowment and robust Qi, recovery occurs in days. If Zheng (Upright Qi) is deficient and residual toxins attack collaterals, it is called Qi Deficiency with Stagnant Toxin; post-ulceration wounds are difficult to close. Generally, strong Stomach and prosperous Spleen, with abundant Qi and Blood, ensure no complications. If the body is frail with poor appetite, or Spleen deficiency with diarrhea, or persistent tidal fever, it develops into consumptive weakness. Note that when this sore begins, if it is red, diffusely swollen, with alternating chills and fever, treat as Excess Syndrome using Heat-clearing and Toxin-resolving methods. If it begins white, diffusely swollen, with slow suppuration, treat as Deficiency Syndrome using Tonification and Support methods. If it fails to heal after ulceration, treat as Deficient Phlegm. Using only Heat-clearing and Toxin-resolving agents damages the Spleen and Stomach, leading to loss of appetite, persistent low-grade fever, and often death from consumptive weakness. This distinction is crucial.