有可发者二∶风寒外来者可发，郁者可发。
阴虚火动难治。火郁当发看何经；轻者可降，重则从其性升之，实火可泻。小便降火极速。
凡气有余便是火。
火急甚重者，必缓之，生甘草兼泻兼缓，人参、白术亦可。
人壮气实、火盛颠狂者，可用正治，或硝冰水饮之。人虚，火盛狂者，可用生姜汤与之。若投以冰水正
治，立死。有补阴即火自降者，炒黄柏、地黄之类。
山栀子仁大能降火，从小便泄去。其性能屈曲下行，降
火人所不知。
凡火盛者，不可骤用凉药，必用温散。
又方∶左金丸治肝火
黄连（六两） 茱萸（一两或半两） 水为丸。白汤下五十丸。
戴云∶新咳嗽，鼻塞声重者是也。
属肺者多，散宜辛温或辛凉之剂。
（属风热。）
戴云∶斑，有色点而无头粒者是。如有头粒，即疹也。风热挟痰而作，自里而发于外，通圣散消息，当以
微汗而散之。下之，非理也。
内伤斑者，胃气极虚，一身火游行于外所致。宜补以降之。发斑似伤寒者，痰热之病发于外，微汗以散
之。下之，非理也。
戴云∶疹，浮小有头粒者是。随出即收，收则又出者是也。非若斑之无头粒也。当明辨之。
属热与痰在肺，清肺火降痰，或解散出汗，亦有可下者。
众人病一般者是也。又谓之天行时疫。有三法∶宜补、宜降、宜散。
又方∶
大黄 黄芩 黄连 人参 桔梗 防风 苍术 滑石 香附 人中黄
上为末，神曲为丸。每服五七十丸。分气血痰作汤使∶气虚，四君子汤；血虚，四物汤；痰多，二陈汤送
下。如热甚者，可用童子小便送下。
大头天行病，东垣有方∶
羌活 酒芩 大黄（酒蒸）
冬温为病，非其时而有其气者。冬时君子当闭藏，而反发泄于外。专用补药带表。
又方∶以竹筒两头留节，中作一窍，纳甘草于中，仍以竹木钉闭窍，于大粪缸中浸一月，取出晒干，专治疫毒。
有两种情况可以采用发汗法：一是风寒之邪从外侵袭，二是火气郁结在内。
阴虚导致虚火上炎者，治疗较为困难。对于火气郁结的情况，应当根据所属经络进行发散治疗；病情较轻的可以用降火法，病情严重的则顺应其升发的特性予以疏散，实火可以直接泻除。通过小便排泄是极快的降火途径。
火势急迫且严重的，必须加以缓和，可以使用生甘草，它既能泻火又能缓急，人参、白术也可以使用。
体质壮实、正气充足、火热炽盛导致癫狂的人，可以采用正治法（寒凉直折），或者让他们饮用硝石、冰水。如果人体质虚弱而火热炽盛导致狂躁，可以给予生姜汤。如果此时投以冰水采用正治法，患者会立即死亡。有些情况通过补阴即可使火自降，如使用炒黄柏、地黄等药物。
山栀子仁具有极强的降火作用，能从小便中泄出火热。它的药性能够屈曲下行，这一点是人们所不知道的降火机理。
另一个方剂：左金丸用于治疗肝火。
黄连（六两） 吴茱萸（一两或半两） 用水泛为丸。用白开水送服五十丸。
戴元礼说：新近发生的咳嗽，伴有鼻塞、声音重浊的，属于此类。
多归属于肺脏，宜用辛温或辛凉的解表散邪药剂。
（属于风热证。）
戴元礼说：斑，是指皮肤上有颜色斑点但没有颗粒状隆起的症状。如果有颗粒状隆起，那就是疹。这是风热挟带痰浊所致，病邪从体内发出到体表，应参考防风通圣散，通过微微发汗来解散病邪。如果使用下法，是不合医理的。
内伤引起的发斑，是因为胃气极度虚弱，全身的火气游行于体表所致。适宜用补益的方法来引火下行。发斑类似伤寒的，是痰热之病发于体表，应用微汗法来解散。如果使用下法，是不合医理的。
戴元礼说：疹，是指浮浅细小且有颗粒状隆起的症状。随出随收，收了又出的，就是疹。不像斑那样没有颗粒状隆起。应当仔细辨别。
属于热与痰在肺脏，应清肺火、降痰浊，或者解散出汗，也有可以使用下法的。
众人患同样的疾病，称为天行时疫。有三种治法：宜补益、宜降火、宜发散。
另一个方剂：
大黄 黄芩 黄连 人参 桔梗 防风 苍术 滑石 香附 人中黄
以上药物研为细末，用神曲糊丸。每次服用五七十丸。根据气血痰的不同情况作为药引送服：气虚者，用四君子汤送服；血虚者，用四物汤送服；痰多者，用二陈汤送服。如果热势严重，可以用童子小便送服。
大头瘟（大头天行病），李东垣有专用方剂：
羌活 酒黄芩 大黄（酒蒸）
冬温病，是指在冬季出现了非时令的气候特征。冬季本应是君子闭藏阳气的时候，反而向外发泄。治疗应专门使用补药并兼有解表作用。
另一个方剂：取竹筒两头保留节段，中间钻一个孔，将甘草放入其中，仍用竹木钉封闭孔洞，在大粪缸中浸泡一个月，取出晒干，专门治疗疫毒。
There are two situations where diaphoresis (sweating therapy) can be employed: one is when wind-cold pathogen invades from the exterior, and the other is when fire qi is constrained internally.
Cases of deficiency of Yin with hyperactive deficient fire are difficult to treat. For constrained fire, dispersion should be applied according to the affected meridian; for mild cases, descending methods may be used, while for severe cases, dispersal should follow its ascending nature. Excess fire can be purged. Promoting urination is a very rapid method to descend fire.
Whenever Qi is in excess, it transforms into Fire.
In cases where Fire is urgent and severe, it must be moderated. Raw Gancao (Radix Glycyrrhizae) can be used, as it both purges Fire and moderates urgency; Renshen (Radix Ginseng) and Baizhu (Rhizoma Atractylodis Macrocephalae) may also be used.
For individuals with robust constitution and sufficient Zheng Qi (Upright Qi), presenting with excessive Fire leading to mania or madness, direct treatment (using cold/cooling herbs to directly subdue heat) can be applied, or they may drink water mixed with Niao Xiao (Sal Nitri) and Bing Pian (Borneolum Syntheticum). For those with weak constitution but excessive Fire causing mania, Shengjiang Tang (Fresh Ginger Decoction) can be given. If Ice Water were administered for direct treatment in such weak cases, death would ensue immediately. In some instances, tonifying Yin causes Fire to descend spontaneously, using herbs such as Chao Huangbai (Fried Cortex Phellodendri) and Dihuang (Radix Rehmanniae Preparata).
Shanzhiren (Semen Gardeniae) has a powerful ability to descend Fire, excreting it through urination. Its medicinal property allows it to curve and descend downward, a mechanism of descending fire that people often do not realize.
In cases of excessive Fire, cooling medicines should not be used abruptly; instead, warm dispersing methods must be employed first.
Another prescription: Zuojin Wan (Left Metal Pill) treats Liver Fire.
Huanglian (Radix Coptidis, 6 liang) and Zhuyu (Fructus Evodiae, 1 liang or half liang) are processed into pills with water. Take 50 pills with plain boiled water.
Dai Yun stated: New-onset cough accompanied by nasal congestion and heavy voice belongs to this category.
It mostly pertains to the Lung; dispersing agents should be pungent-warm or pungent-cool in nature.
(Attributed to Wind-Heat.)
Dai Yun stated: Ban (Macules/Patches) are characterized by colored spots without granular elevation. If there are granular elevations, it is Zhen (Papules/Rash). This arises from Wind-Heat carrying Phlegm, emerging from the interior to the exterior. One should refer to Fengwang Tongsheng San (Wind-Blocking Unblocking Powder) and disperse it via slight sweating. Using purgation is contrary to medical principles.
Ban caused by internal injury results from extreme deficiency of Stomach Qi, causing Fire to wander on the exterior of the body. Tonification to guide Fire downward is appropriate. Ban resembling Taiyang disease (Cold Damage) is caused by Phlegm-Heat manifesting externally; it should be dispersed via slight sweating. Using purgation is contrary to medical principles.
Dai Yun stated: Zhen (Papules/Rash) are characterized by superficial, small lesions with granular elevation. They appear and disappear quickly, appearing again after receding. This differs from Ban which lacks granular elevation. Careful differentiation is required.
This pertains to Heat and Phlegm in the Lung; clearing Lung Fire and descending Phlegm, or dispersing via sweating, are appropriate. There are also cases where purgation can be used.
This refers to the situation where everyone suffers from the same illness, also known as Tianxing Shi Yi (Epidemic Disease of Heavenly Transmission). There are three therapeutic methods: tonification, descending, and dispersing.
Another prescription:
Dahuang (Radix et Rhizoma Rhei), Huangqin (Radix Scutellariae), Huanglian (Radix Coptidis), Renshen (Radix Ginseng), Jiegeng (Radix Platycodonis), Fangfeng (Radix Saposhnikoviae), Cangzhu (Rhizoma Atractylodis), Huashi (Talcum), Xiangfu (Rhizoma Cyperi), Renzhonghuang (Human Manure Yellow).
Grind the above into powder and form pills with Shenqu (Massa Medicata Fermentata). Take 50–70 pills per dose. Administer as decoctions based on Qi, Blood, or Phlegm imbalances: for Qi deficiency, use Sijunzi Tang (Four Gentlemen Decoction); for Blood deficiency, use Siwu Tang (Four Substances Decoction); for excessive Phlegm, use Erchen Tang (Two Aged Decoction). If Heat is severe, Tongzi Xiaosui (Child's Urine) can be used to wash down the pills.
Datou Tianxing Bing (Great Head Epidemic), Dongyuan (Li Dongyuan) has a prescription:
Qianghuo (Rhizoma et Radix Notopterygii), Jiu Huangqin (Wine-processed Radix Scutellariae), Dahuang (Radix et Rhizoma Rhei, wine-steamed).
Dongwen Bing (Winter-Warmth Disease) occurs when non-seasonal climate conditions prevail during winter. In winter, the gentleman should store and conceal Yang Qi, but here it leaks outward. Treatment should exclusively use tonifying herbs combined with exterior-releasing agents.
Another prescription: Take a bamboo tube retaining nodes at both ends, drill a hole in the middle, place Gancao (Radix Glycyrrhizae) inside, seal the hole with a bamboo/wood peg, soak it in a fecal pit for one month, take it out, dry it, and use it specifically to treat Yi Du (Epidemic Toxins).