有血热发者，有毒盛发者，有感风发者，此三者宜消毒散加防风、连翘、玄参、蝉衣、地骨、生地、黄
芩、荆芥等药。又曰痒者急疏风以开其牖，攻毒以达其滞则止矣。
又云∶热毒壅于皮肤，气为郁遏，血被煎熬，气非不足也，锢之则焰，血非自热也，灼之则迫，
游行皮肉，痒之所以作也，重加石膏、生地凉解，以杀其热毒之势，庶气血不受邪虐，何患乎痒之有哉！若内
症猖狂，大便秘结，用大黄、麻黄、枳壳，速宜荡涤，不可临渴而浚井也。又有俗法，升麻、苍术、桑皮、荆
芥、防风、柳枝、槐枝，共水煎以布拭之，即止。
疹后泄泻而便脓血，此邪热内陷，大忌止涩，最宜升发开提，虽云清气不复，脾胃虚弱，不得轻用生 ，
但解其热，凉其血，而诸症自愈。治疹之法与他症大不相同，宜清热发散，凉肠为主。便下纯血者风伤肝也，
宜散风凉血。如豆汁者湿伤脾也，宜清热渗湿为主，倘若鲜血者为肠风，随感而见也，瘀血者为脏
毒积久而发也，粪前为近血，出于肠胃。粪后为远血，出于肺肝，用药切忌酸涩之味，如疹后见之者，此移
热于大肠，药宜降之，随进槐角、川连、石膏、木通、六一散、山栀、黄芩、杏仁，久则地榆亦同功。《经》
云∶肾者胃之关也。肾主二便，久泻肾虚，不可专责脾胃也。疹毒传大肠，或泻痢脓浆，此是脏传
腑，能知其因必得安康矣。
有因血热而发痒的，有因毒邪炽盛而发痒的，有因感受风邪而发痒的，这三种情况适宜使用消毒散（具有清热解毒、消肿散结功效的方剂）加入防风、连翘、玄参、蝉衣、地骨皮、生地、黄芩、荆芥等药物。又说：发痒应当迅速疏风以开通腠理（皮肤毛孔），攻解毒邪以通达郁滞，瘙痒就能停止。
又说：热毒壅塞在皮肤，气机被郁遏，血液被煎熬，气并非不足，被禁锢则如火焰燃烧；血并非自热，被灼烧则迫急不安，气血游行于皮肉之间，这就是瘙痒产生的原因，应加重石膏、生地的用量以清凉解表，来遏制热毒的势头，这样气血就不受邪气的侵害，还担心什么瘙痒呢！如果内症猖狂，大便秘结，使用大黄、麻黄、枳壳，应当迅速荡涤积滞，不可等到口渴了才去挖井（比喻事到临头才想办法）。又有民间俗法，用升麻、苍术、桑白皮、荆芥、防风、柳枝、槐枝，共同用水煎煮后用布擦拭患处，瘙痒即可停止。
出疹后出现泄泻并大便带脓血，这是邪热内陷，最忌讳使用收敛止涩的药物，最适合采用升提发散的方法，虽然常说清气下陷不复，脾胃虚弱，但不能轻易使用生地黄，只要解除热邪，凉血，各种症状自然痊愈。治疗疹病的方法与其他病症大不相同，应以清热发散、凉肠为主。大便纯血的，是风邪损伤肝脏，适宜疏散风邪、凉血。如豆汁样的，是湿邪损伤脾脏，应以清热渗湿为主。如果是鲜血，属于肠风，随感邪而显现；如果是瘀血，属于脏毒，积聚日久发作；便前出血为近血，出于肠胃；便后出血为远血，出于肺肝。用药切忌酸涩之味，如疹后出现这种情况，这是热邪移于大肠，药宜降逆，随即进服槐角、黄连、石膏、木通、六一散、山栀、黄芩、杏仁，时间久了地榆也有相同功效。《内经》说：肾是胃的关口。肾主管二便，久泻导致肾虚，不能只责怪脾胃。疹毒传人大肠，或出现泻痢脓浆，这是脏病传腑，能知道病因必定能获得安康。
There are cases where itching arises from blood heat, from excessive toxicity, or from contracting wind pathogen. These three types are suitable for treating with Xiaodu San (Detoxification Powder) added with Fangfeng (Saposhnikovia Root), Lianqiao (Forsythia Fruit), Xuanshen (Scrophularia Root), Chan Yi (Cicada Slough), Digupi (Lycium Bark), Shengdi (Rehmannia Root), Huangqin (Scutellaria Root), and Jingjie (Schizonepeta Spike). It is also said: When itching occurs, one should promptly disperse wind to open the cou-li (skin pores), and attack toxicity to unblock stagnation, thereby stopping the itch.
It is further stated: Heat-toxin congests in the skin, qi mechanism is depressed, and blood is scorched. Qi is not deficient; when constrained, it flares like fire. Blood is not inherently hot; when scorched, it becomes urgent. As qi and blood circulate within the flesh and skin, this is why itching arises. One should increase the dosage of Shigao (Gypsum Fibrosum) and Shengdi (Rehmannia Root) to cool and resolve, thereby suppressing the momentum of heat-toxin. In this way, qi and blood will not suffer from evil influence, and what worry is there regarding itching? If internal symptoms are rampant and feces are dry and constipated, use Dahuang (Rhubarb Rhizome), Mahuang (Ephedra Herb), and Zhike (Aurantium Fructus) to rapidly purge accumulation. One must not wait until thirsty to dig a well (i.e., act too late). There is also a folk method: boil Shengma (Cimicifuga Rhizome), Cangzhu (Atractylodes Rhizome), Sangbai (Morus Root Bark), Jingjie (Schizonepeta Spike), Fangfeng (Saposhnikovia Root), Liuzhi (Willow Branch), and Huaizhi (Sophora Branch) in water, and wipe the affected area with a cloth soaked in the decoction; the itching will cease.
After the eruption of rashes, if diarrhea occurs accompanied by pus and blood in the stool, this indicates that evil heat has sunk inward. Astringent and binding agents are strictly contraindicated; instead, lifting and dispersing methods are most appropriate. Although it is often said that clear qi fails to ascend and spleen-stomach is weak, one should not lightly use Shengdi (Rehmannia Root). By resolving the heat and cooling the blood, all symptoms will heal spontaneously. The treatment of rashes differs significantly from other diseases; it should primarily focus on clearing heat, dispersing outward, and cooling the intestines. Stool consisting purely of blood indicates wind damaging the liver; dispersing wind and cooling blood is indicated. Stool resembling bean juice indicates dampness damaging the spleen; clearing heat and leaching out dampness is primary. If fresh blood appears, it is known as Changfeng (Intestinal Wind), appearing upon contraction of pathogens; if dark clotted blood appears, it is Zangdu (Visceral Toxin), erupting after long-term accumulation. Bleeding before defecation is Jin Xue (Near Blood), originating from the stomach and intestines; bleeding after defecation is Yuan Xue (Far Blood), originating from the lungs and liver. Medications must avoid sour and astringent flavors. If seen after rashes, this indicates heat transferring to the large intestine; medications should descend. Subsequently administer Huaijiao (Styrax Seed), Chuanlian (Coptis Rhizome), Shigao (Gypsum Fibrosum), Mutong (Akebia Caulis), Liuyi San (Six-to-One Powder), Shanzhi (Gardenia Fruit), Huangqin (Scutellaria Root), and Xingren (Apricot Seed). Over time, Diyü (Sanguisorba Root) yields similar effects. The *Classic* states: "The kidney is the gate of the stomach." The kidney governs the two lower orifices. Prolonged diarrhea leads to kidney deficiency; one cannot solely blame the spleen and stomach. When rash toxin transmits to the large intestine, causing dysentery with pus and plasma, this represents the transmission from zang organs to fu organs. Knowing the cause ensures recovery and health.