万密斋治一妇人，病至十三日，其家人来求药，告以病状∶初苦头痛，到今十日，昏睡不醒，喉中痰响，
手足俱冷，其身僵直。万思之∶时辛酉二月朔后，平地雪尺余，此妇元气素弱，必因远行而得。（三阴脉从
腹下走足也。）问之，果于初三日冒雪往亲戚家，归即病。曰∶此寒邪中足少阴、厥阴二经也。默默喜睡者，
足少阴肾病也；头苦痛、厥逆、僵直、痰响者，足厥阴肝病也。乃以十全大补汤去地黄、白芍，加细辛、半
夏、干姜，与三剂。去五日来谢曰∶病安矣。
吴孚先治一人，伤寒头痛，不发热，干呕吐沫。医用川芎、 本不应。吴曰∶此厥阴中寒之症。干呕吐沫，
厥阴之寒上干于胃也；头痛者，厥阴与督脉会于颠，寒气从经脉上攻也。用人参、大枣益脾以防木邪，吴茱萸、
生姜入厥阴以散寒邪，且又止呕，呕止而头痛自除。设无头痛，又属太阴而非厥阴矣。（直中病，但有少阴
症反发热。）
一人患厥阴直中，四肢厥冷，脉细欲绝，爪甲青紫，但不吐利，与四逆汤。至三日，四肢暖，甲红发热，
脉转实数有力，此阴极阳生也，使与凉剂。病家疑一日寒温各异，不肯服。至九日，热不退，热利下重，饮水
不辍，再求诊，用白头翁、秦皮、黄连、黄柏各二钱，一帖减，二帖痊。（真寒症，断无饮水下痢之变。）
按∶肢冷脉伏，恐是阳厥。至爪甲青紫，则是欲战汗也。四逆汤之误，特隐而不彰耳。余有凌二官案可
参。（凌二官即热病门之凌表侄。）
吴孚先治汪掖苍母，忽心腹奇痛异常，左右脉弦紧，用二陈去甘草，加肉桂、干姜、木香，病不减。次日，
寒热交作，往来如疟，热已复寒，寒已复热，昼夜无度，脉转疾数，前方加人参五钱，附子二钱，不应。复增
参至一两，附子至五钱，脉反渐脱。吴谓∶少阴中寒，当与参、附，今不效，毕竟病深药浅之故。时有医者四
人，一欲用枳实、贝母，一欲用全蝎、防风；一欲用八味丸；一欲用人参、黄 各八分，肉桂四分，附子三分。
吴曰∶业已泄泻，反用枳实，虚极汗多，反用全蝎，此二人全不知病。八味丸系调理之药，尚在未着。参、 、
桂、附，庶几合症，但杯水车薪，曷克有济？夫用药如用兵，冲坚捣浓，非猛士多多不可，李信之败可鉴也。
用四两，煎汤代水，人参四两，附子二两，煎膏。时病患面色如妆，汗出如珠，六脉俱脱，呼吸全无，牙关
紧闭，幸太溪脉尚在，乃以箸抉齿灌半钟，移时又进半钟，犹防脉之暴出也。既而重按两尺，隐跃指端，乃曰∶
脉渐出，大有起色矣。复进半钟，自午至晚，方眼开语出，欲啜粥。已而反畏寒，喉痛，频索冷水，或疑是火。
曰∶畏寒者真情，索冷者假象。少阴脉循喉咙，邪客其络，令人咽痛，今寒邪由脏出经，病将退耳，仍前方加
桔梗、甘草而痛止。自后每日参必一两，附必三钱，调理百日而愈。愈后，遍体发疹，挟生疙瘩，奇痒异常，
爬搔不辍，不寐汗多，用六君子，另将黄 二两煎汤煮药，十日不应。汪检《准绳》风疹门与阅，俱系风药，
并无补方，曰∶神而明之，存乎其人，不可泥也。仍守前方，数剂霍然。
马元仪治陆济臣，患症甚笃。诊之，两脉虚微，自汗厥逆，面青唇青，呃逆不止。此少阴真阳素亏，寒邪
直中之候也。阴寒横发，上乾清道，旁逆四末，甚为危厉，兼以自汗不止，虚阳将脱，法当用桂附理中汤，以
消阴摄阳。阳既安位，则群阴毕散矣。是夜连进二剂，脉渐起，汗渐收。五六剂，症始霍然。
吴洋治结林潘氏子始强，早起有事牖下，寻病作，头痛恶寒，诸饮食自鼎沸中致之，不尽三之一，其一以
为寒矣。即人尝之，莫不糜烂，彼口舌自如。当暑衣重裘，犹以为薄，众医累治不效。乃迎洋。曰∶病由下虚，
病寒气深入，固结不散，法当不治，即幸而可治，不出三年。寻以温补剂愈之，参、附辄倍他药，其后复病而
卒，终三年。（《太函集》。）
窦材治一人，患肺伤寒，（别名。）头疼发热，恶寒咳嗽，肢节疼，脉沉紧，服华盖散、黄 建中汤略解。至
五日，昏睡谵语，四肢微厥，乃肾气虚也。灸关元百壮，服姜附汤，始汗出愈。
一人伤寒，昏睡妄语，六脉弦大。窦曰∶脉大而昏睡，定非实热，乃脉随气奔也。强为之治，用烈火灸关
元穴。初灸觉痛，至七十壮，遂昏睡不痛。灸至三鼓，病患开眼，思饮食。令服姜附汤，至三日后，方得元气
来复，大汗出解。
一人患伤寒，至八日，脉大而紧，发黄，生紫斑，噫气，足趾冷至脚面。此太阴症也，最重，难治。为灸
命关五十壮，关元二百壮，服金液丹、钟乳粉，四日汗出而愈。
一人患伤寒至六日，脉弦紧，身发热，自汗，太阴症也，先服金液丹，点命关穴。病患不肯灸。伤寒惟太
阴少阴二症，伤人最速，若不早灸，服药无功。不信，至九日泻血而死。
一人伤寒至六日，微发黄，一医与茵陈汤，次日更深黄色，遍身如栀子。此太阴症，误服凉药而致，肝木
侮脾，为灸命关五十壮，服余液丹而愈。
一人患伤寒，初起即厥逆，脉一息八九至，诸医以为必死。窦曰∶乃阴毒也。（厥逆脉数，断为阴毒，必有
爪青、吐利、蜷卧等症。）与姜附汤一盏，至半夜，汗出而愈。若以脉数为热，而下凉药，必死无疑。
万密斋诊治一位妇人，患病已到第十三日，她的家人前来求药，告知病情：起初痛苦于头痛，至今十日，昏睡不醒，喉中有痰鸣声，手足都冰冷，身体僵硬挺直。万密斋思考道：当时是辛酉年二月初一之后，平地积雪有一尺多厚，这位妇人元气素来虚弱，必定是因为远行而致病。（三阴脉从腹部下行至足部。）询问后得知，果然在初三日冒着雪去亲戚家，回家后就生病了。他说：这是寒邪中伤了足少阴肾经和足厥阴肝经。沉默嗜睡，是足少阴肾病；头部剧烈疼痛、四肢逆冷、身体僵硬、痰鸣，是足厥阴肝病。于是用十全大补汤去掉地黄、白芍，加入细辛、半夏、干姜，给予三剂药。过了五天来道谢说：病已经好了。
吴孚先诊治一人，患伤寒头痛，不发热，干呕吐沫。医生使用川芎、藁本治疗，不应验。吴孚先说：这是厥阴经受寒的病症。干呕吐沫，是厥阴之寒上犯胃腑；头痛，是因为厥阴脉与督脉会合于头顶，寒气沿经脉上攻所致。用人参、大枣补益脾气以防肝木邪气侵犯，吴茱萸、生姜入厥阴经以散寒邪，且又能止呕，呕吐停止则头痛自然消除。如果没有头痛，又属于太阴病而非厥阴病了。（直中病证，只有少阴病反而发热的情况。）
另一人患厥阴经直中寒邪，四肢厥冷，脉象细弱几乎摸不到，指甲青紫，只是没有呕吐腹泻，给予四逆汤。到了第三天，四肢变暖，指甲变红发热，脉象转为实数有力，这是阴极阳生（阴寒极盛而阳气初生）的表现，应当给予凉性药剂。病人家属怀疑一天之内寒热用药各异，不肯服用。到了第九天，发热不退，出现热利下重（痢疾里急后重），饮水不停，再次求诊，用白头翁、秦皮、黄连、黄柏各二钱，一帖症状减轻，两帖痊愈。（真寒证，绝无饮水和下痢的变化。）
按语：肢冷脉伏，恐怕是阳厥（热深厥亦深）。至于指甲青紫，则是将要战汗（正气抗邪，正邪交争而出汗）的表现。四逆汤的使用有误，只是隐蔽而不明显罢了。可以参考我记录的凌二官医案。（凌二官即热病门中的凌表侄。）
吴孚先诊治汪掖苍的母亲，忽然心腹奇痛异常，左右脉象弦紧，用二陈汤去掉甘草，加入肉桂、干姜、木香，病不减。第二天，寒热交替发作，往来如疟疾，热退后又发冷，冷退后又发热，昼夜无度，脉象转为疾数，前方加入人参五钱、附子二钱，无效。又增加人参至一两，附子至五钱，脉象反而逐渐虚脱。吴孚先说：少阴经受寒，应当用人参、附子，现在无效，终究是病深药轻的缘故。当时有四位医者，一位想用枳实、贝母，一位想用全蝎、防风；一位想用八味丸；一位想用人参、黄芪各八分，肉桂四分，附子三分。吴孚先说：已经泄泻，反而用枳实破气，极度虚弱汗多，反而用全蝎发散，这两个人完全不懂病机。八味丸是调理的药物，还不在当前紧要处。人参、黄芪、肉桂、附子，勉强符合病症，但杯水车薪，怎么能起作用？用药如同用兵，攻坚破阵，非猛将众多不可，李信失败的历史教训可以借鉴。用黄芪四两，煎汤代水，人参四两，附子二两，煎成膏状。当时病患面色如妆（假神），汗出如珠，六脉俱脱，呼吸全无，牙关紧闭，幸而太溪脉尚在，于是用筷子撬开牙齿灌服半钟，过一会儿又进服半钟，还要防止脉象暴出（虚阳外越）。不久重按两尺部，脉搏隐跃指端，于是说：脉象逐渐复出，大有起色了。再进服半钟，从中午到晚上，才眼睛睁开能说话，想要喝粥。随后反而畏寒，喉咙痛，频繁索要冷水，有人怀疑是火证。吴孚先说：畏寒是真象，索冷是假象。少阴脉循行经过喉咙，邪气客居络脉，导致咽痛，现在寒邪由脏出经，病将要退了，仍在前方中加入桔梗、甘草而疼痛停止。此后每日人参必用一两，附子必用三钱，调理百日而愈。痊愈后，遍体发疹，夹杂生疙瘩，奇痒异常，抓挠不停，失眠汗多，用六君子汤，另外将黄芪二两煎汤煮药，十天无效。汪氏查阅《医学准绳》风疹门，都是风药，并无补方，吴孚先说：神而明之，存乎其人，不可拘泥。仍守前方，数剂霍然痊愈。
马元仪诊治陆济臣，患病非常严重。诊察发现，两脉虚微，自汗厥逆，面青唇青，呃逆不止。这是少阴真阳素来亏虚，寒邪直中的征候。阴寒横发，上犯清道，旁逆四肢末端，非常危厉，兼有自汗不止，虚阳即将脱失，治法应当用桂附理中汤，以消阴摄阳。阳气既已安位，则群阴毕散了。当夜连进两剂，脉象渐起，汗渐收。五六剂后，症状才豁然缓解。
吴洋诊治结林潘氏长子始强，早起在窗下有事务，随即发病，头痛恶寒，所有饮食都是从沸腾锅中取出的，吃下去并不觉得烫，其中三分之一以为是冷的。让人尝一下，无不糜烂，但他口舌自如。正当暑天穿着厚重皮衣，还认为单薄，众医多次治疗无效。于是迎接吴洋。吴洋说：病由下虚，寒气深入，固结不散，治法应当不治，即使侥幸可治，不出三年也会死。后来用温补剂治愈，人参、附子的用量总是加倍于其他药物，其后复发而死，终应三年之期。（出自《太函集》。）
窦材诊治一人，患肺伤寒（别名），头疼发热，恶寒咳嗽，肢节疼痛，脉沉紧，服用华盖散、黄芪建中汤略有好转。到了第五天，昏睡谵语，四肢微厥，这是肾气虚也。灸关元穴一百壮，服用姜附汤，才开始出汗而愈。
另一人患伤寒，昏睡妄语，六脉弦大。窦材说：脉大而昏睡，定不是实热，乃是脉随气奔（气机紊乱）所致。强行治疗，用烈火灸关元穴。初灸时觉得痛，灸到七十壮，便昏睡不觉痛。灸到三更天，病患睁眼，想吃东西。令其服用姜附汤，三天后，才得元气来复，大汗出而解。
另一人患伤寒，到第八天，脉大而紧，发黄，生紫斑，打嗝，脚趾冷至脚面。这是太阴病，最重，难治。为他灸命关穴五十壮，关元穴二百壮，服用金液丹、钟乳粉，四天出汗而愈。
另一人患伤寒到第六天，脉弦紧，身发热，自汗，属太阴病，先服用金液丹，点灸命关穴。病患不肯灸。伤寒唯有太阴、少阴二症，伤人最速，若不早灸，服药无功。不信，到第九日泻血而死。
另一人患伤寒到第六天，微发黄，一医生给予茵陈汤，次日更深黄色，遍身如栀子色。这是太阴病，误服凉药所致，肝木侮脾，为灸命关穴五十壮，服用余液丹而愈。
另一人患伤寒，初起即厥逆，脉一息八九至（脉搏极快），诸医以为必死。窦材说：这是阴毒证。（厥逆脉数，断定为阴毒，必有爪甲青紫、呕吐腹泻、蜷卧等症状。）给予姜附汤一盏，到半夜，出汗而愈。如果因为脉数认为是热证，而下用凉药，必死无疑。
Wan Mizhai treated a woman who had been ill for thirteen days. Her family came to seek medicine and reported her condition: initially suffering from headache, she had been unconscious and sleeping deeply for ten days, with phlegm rattling in her throat, cold hands and feet, and a stiff, rigid body. Wan Mizhai pondered: It was after the first day of the second month in the Xinyou year, with over a foot of snow on the ground. This woman’s primordial qi (vital energy) had always been weak; she must have contracted the illness due to traveling far. (The three Yin meridians run from the abdomen down to the feet.) Upon inquiry, it was confirmed that she had indeed traveled to a relative's house in the snow on the third day and fell ill upon returning. He said: "This is cold pathogen directly invading the Foot Shaoyin Kidney Meridian and Foot Jueyin Liver Meridian. Silence and preference for sleep indicate Kidney disease of the Foot Shaoyin; severe headache, cold extremities, rigidity, and phlegm rattle indicate Liver disease of the Foot Jueyin." He prescribed Shiquan Dabu Tang (Complete Ten Tonics Decoction), removing Rehmanniae Radix Preparata (Shu Di Huang) and Paeoniae Radix Alba (Bai Shao), and adding Asari Radix (Xi Xin), Pinelliae Rhizoma Preparatum (Ban Xia), and Zingiberis Rhizoma (Gan Jiang), giving three doses. Five days later, they returned to thank him, saying the illness was cured.
Wu Fuxian treated a man with Taiyang Shanghan (Cold Damage) presenting with headache, no fever, and dry retching with frothy saliva. The physician used Chuanxiong Rhizoma (Chuan Xiong) and Ligustici Rhizoma et Radix (Gao Ben), but it was ineffective. Wu Fuxian said: "This is a syndrome of Cold invading the Jueyin Meridian. Dry retching and frothy saliva occur because Jueyin Cold invades the Stomach upward; the headache arises because the Jueyin Meridian meets the Du Mai (Governor Vessel) at the vertex, and cold pathogen attacks upward along the meridian." He used Ginseng Radix et Rhizoma (Ren Shen) and Jujubae Fructus (Da Zao) to tonify Spleen Qi to prevent Liver Wood pathogenic influence, and Evodiae Fructus (Wu Zhu Yu) and Zingiberis Fructus (Sheng Jiang) to enter the Jueyin Meridian to disperse cold and stop vomiting. Once vomiting ceased, the headache naturally resolved. If there were no headache, it would belong to the Taiyin rather than Jueyin. (In direct invasion syndromes, only Shaoyin may present with counterfeiting fever.)
Another patient suffered from direct invasion of Cold into the Jueyin Meridian, with cold extremities, a fine pulse nearly imperceptible, and cyanotic fingernails, but without vomiting or diarrhea. He was given Sini Tang (Frigid Extremities Decoction). By the third day, his extremities warmed, nails turned red and warm, and the pulse became full, rapid, and forceful. This indicated the generation of Yang from extreme Yin. A cooling formula should have been administered. However, the family doubted the change from cold to hot medication within one day and refused to take it. By the ninth day, fever persisted, accompanied by dysentery with tenesmus and incessant thirst for water. Upon re-examination, Baitouweng San (Peony Root Powder) ingredients—Pulsatillae Radix (Baitouweng), Barkia Cortex (Qin Pi), Coptidis Rhizoma (Huang Lian), and Phellodendri Cortex (Huang Bo)—each two qian were prescribed. Symptoms improved after one dose and resolved after two. (True cold syndromes do not typically transform into drinking water and dysentery.)
Commentary: Cold limbs and hidden pulse suggest Yang Jue (Heat Jue). Cyanotic nails suggest impending Zhan Han (shivering sweat). The use of Sini Tang was erroneous but concealed. Refer to my case of Ling Erguan. (Ling Erguan is the nephew mentioned in the Heat Disease section.)
Wu Fuxian treated the mother of Wang Yecang, who suddenly experienced severe abdominal pain. Her pulses on both sides were wiry and tight. Erchen Tang (Two-Aged Phlegm Decoction) minus Licorice Root (Gan Cao), plus Cinnamon Bark (Rou Gui), Ginger Rhizome (Gan Jiang), and Aucklandiae Radix (Mu Xiang) failed to reduce the illness. The next day, alternating chills and fever occurred like malaria, with no rhythm. The pulse became rapid and frequent. The previous formula was modified with five qian of Ren Shen and two qian of Aconiti Lateralis Radix Preparata (Fu Zi), but it failed. Increasing Ren Shen to one liang and Fu Zi to five qian caused the pulse to gradually collapse. Wu Fuxian stated: "Shaoyin Cold invasion requires Ren Shen and Fu Zi. Its failure here is due to deep pathology and shallow medication." Four other physicians suggested different treatments: one proposed Aristolochiae Fructus (Zhi Shi) and Fritillariae Bulbus (Bei Mu); another Scorpion (Quan Xie) and Saposhnikoviae Radix (Fang Feng); another Jiwei Wan (Eight-Ingredient Pill); and another Ren Shen, Astragali Radix (Huang Qi) each eight fen, Rou Gui four fen, and Fu Zi three fen. Wu Fuxian said: "With diarrhea, using Zhi Shi is wrong; with extreme deficiency and sweating, using Quan Xie is wrong. These two know nothing of the disease. Jiwei Wan is for regulation, not acute crisis. Ren Shen, Huang Qi, Rou Gui, and Fu Zi are appropriate but insufficient—like pouring a cup of water on a cartload of firewood. Li Xin’s defeat serves as a warning." He prescribed four liang of Huang Qi decocted as water substitute, four liang of Ren Shen, and two liang of Fu Zi made into a paste. The patient had a flushed face (false spirit), bead-like sweat, collapsed six pulses, absent respiration, and locked jaw. Fortunately, the Taixi pulse remained. Using chopsticks to pry open the teeth, half a zhong was灌 (administered), followed by another half zhong later, guarding against sudden pulse emergence. Soon, pressing the Chi positions revealed a subtle pulse. "The pulse is returning; great improvement," he said. Another half zhong was given from noon to evening, until eyes opened, speech resumed, and porridge was desired. Subsequently, fear of cold, sore throat, and craving cold water appeared. Some suspected Fire. Wu said: "Fear of cold is true; craving cold is false. The Shaoyin Meridian passes through the throat; pathogen in the collateral causes sore throat. Now cold moves from Zang to Jing, indicating recovery." He added Platycodonis Radix (Jie Geng) and Gan Cao to the formula, stopping the pain. Thereafter, daily Ren Shen was one liang, Fu Zi three qian. After 100 days of regulation, she recovered. Post-recovery, she developed widespread rash and nodules with intense itching, insomnia, and sweating. Liujunzi Tang was used, with two liang of Huang Qi decocted to cook herbs, but ineffective for ten days. Wang consulted *Yixue Zhunsheng* Wind Rash section, which listed only wind-dispelling drugs, no tonics. Wu said: "Divine understanding lies in the practitioner; do not be dogmatic." He stuck to the original formula, resolving the issue in a few doses.
Ma Yuanyi treated Lu Jichen, who was critically ill. Pulses were deficient and minute, with spontaneous sweating, cold extremities, blue face and lips, and continuous hiccups. This indicated congenital deficiency of True Yang in Shaoyin with direct cold invasion. Yin-Cold surged horizontally, attacking the clear pathways above and the extremities laterally, extremely critical. With unceasing sweating, Deficient Yang was about to collapse. The method required Guifu Lizhong Tang (Cinnamon, Aconite, and Spleen-Tonifying Decoction) to dissipate Yin and secure Yang. Once Yang was settled, all Yin pathogens dispersed. Two doses taken overnight raised the pulse and stopped sweating. Five to six doses led to resolution.
Wu Yang treated Pan Shiqiang, eldest son of Pan Shi of Jieline. While working under a window early in the morning, he suddenly fell ill with headache and aversion to cold. All food taken from boiling pots felt cool to him; one-third thought it was cold. Others tasted it and found it scalding, yet his mouth and tongue were normal. In summer heat, he wore heavy fur coats, still feeling thin. Multiple physicians failed. Wu Yang was summoned. He said: "Deficiency below, deep cold invasion, knotted and unresolving. Prognosis is poor; even if curable, death will occur within three years." He eventually cured him with warming and tonifying agents, doubling the dosage of Ren Shen and Fu Zi compared to other herbs. He relapsed and died exactly three years later. (*Taihan Ji*)
Dou Cai treated a person with Fei Shanghan (Lung Cold Damage), alias. Symptoms included headache, fever, aversion to cold, cough, joint pain, and deep-tight pulse. Huagai San (Canopy Powder) and Huangqi Jianzhong Tang (Astragalus Middle-Joint Building Decoction) provided slight relief. On the fifth day, somnolence and delirium occurred, with slightly cold extremities, indicating Kidney Qi deficiency. Guan Yuan (CV4) was moxa-burned for 100 zhuang, and Jiangfu Tang (Ginger-Aconite Decoction) was administered. Sweat ensued, and he recovered.
Another patient with Shanghan presented with somnolence, delirium, and wiry-large pulses on all six positions. Dou Cai said: "Large pulse with somnolence is definitely not excess heat; it is pulse following chaotic Qi." He forcibly treated with fierce moxa-burning at Guan Yuan. Initially painful, by 70 zhuang, the patient slept without pain. By midnight (third watch), the patient opened eyes and desired food. Jiangfu Tang was given. After three days, Yuan Qi recovered, massive sweat ensued, and the patient resolved.
Another patient with Shanghan reached the eighth day with large-tight pulse, jaundice, purple spots, belching, and cold toes extending to the instep. This was a Taiyin syndrome, most severe and difficult to treat. Ming Guan (BL57? Note: Context implies specific moxa point, likely BL57 Chengshan or similar, but text says Ming Guan which often refers to ST25 or specific emergency points in Dou Cai's school, usually interpreted as a vital moxa point) was moxa-burned for 50 zhuang, Guan Yuan for 200 zhuang. Jin Ye Dan (Golden Liquid Pill) and Zhongru Fen (Cloud Milk Powder) were administered. Recovery occurred with sweat after four days.
Another patient with Shanghan reached the sixth day with wiry-tight pulse, fever, and spontaneous sweating. This was a Taiyin syndrome. Jin Ye Dan was taken first, and Ming Guan was moxa-burned. The patient refused moxibustion. Dou Cai noted: "Only Taiyin and Shaoyin Shanghan injure people fastest. Without early moxibustion, medicine is useless." The patient did not believe, bled from the bowels on the ninth day, and died.
Another patient with Shanghan reached the sixth day with mild jaundice. One physician gave Yinchen Tang (Artemisia Capillaris Decoction). The next day, jaundice deepened, turning the whole body yellow like gardenia. This was a Taiyin syndrome caused by mistakenly taking cooling medicines, leading to Liver Wood insulting Spleen Earth. Ming Guan was moxa-burned for 50 zhuang, and Yuye Dan (Residual Liquid Pill) was administered. Recovery occurred.
Another patient with Shanghan presented with immediate cold extremities and a rapid pulse (8-9 beats per breath). Physicians deemed it fatal. Dou Cai said: "This is Yin Du (Yin Toxin)." (Cold extremities with rapid pulse indicates Yin Toxin, accompanied by cyanotic nails, vomiting/diarrhea, and curled posture.) One bowl of Jiangfu Tang was given. Recovery occurred with sweat at midnight. If mistaken for heat due to rapid pulse and treated with cooling drugs, death would be certain.