（状如锦纹，其中有空缺处，如云头样者，为 ，遍身无空处，疏密不等者、为疹）
〔万〕疹一名麻子，君火所为也。（或曰脾为疹）经曰∶少阴所至，为疡疹，在人则心火主之。夫心火亢甚，则
制已所胜，焚灼肺金，肺主皮毛，故疹毒见于皮肤之间，如蚊蚤所咬之状。痘疮只出一般者善，若与疹毒并出，
谓之夹疹，其候极恶，惟痘本稀疏而夹疹者，庶乎可治。疮本稠密，与疹并出，彼此相混，琐碎莫辨，急用辛凉之
药发而解之，如疹毒渐消，疮本磊落者，亦可治也。疹痘相并，毒不少减，此危恶之疾，孰能料其生乎。疮出夹
疹者，荆防败毒散主之，疹毒消者，可治。如疮收靥后复出疹者，此余毒解散之兆，不须治之。
〔薛〕夫疹乃风邪外患，痘为胎毒内发，二证并作，脏腑俱病也。二者相杂，赤晕发 ，痘疮愈盛，误
谓痘出太密，多不可救，然此乃夹疹痘也，当治以人参羌活散，疹毒即解，痘势亦退，其元气亏损，不能
结痂，当补脾胃为急也。〔翁〕痘内夹出丹疹者，不必治之，当以托痘为主，痘出，而疹自消矣。
荆防败毒散
柴胡 甘草 人参 桔梗 川芎 茯苓 枳壳 前胡 羌活 独活 荆芥穗 防风（各等分）
上锉细。加薄荷五叶，水一盏，煎七分，去滓温服。
人参羌活散 治时气痘疹，兼于发表。
人参 羌活 独活 柴胡 前胡 桔梗 茯苓 枳壳 川芎 天麻 甘草 地骨皮（各三分）
上，入薄荷五叶，姜水煎服。
上，表证多者宜之。
清和饮
地骨皮（鲜者） 麦门冬（去心。各二钱） 生地黄 知母 贝母 橘红 茯苓 甘草 荆芥穗（各七分
）牛蒡子（炒、研，一钱半） 桔梗（五分） 全栝蒌（一钱）
上，里证多者宜之。虚者，加人参、黄 。
(The rash resembles patterns on brocade, with empty spaces in between, resembling cloud shapes, is called "Sha" (fine rash); covering the whole body without gaps, varying in density, is called "Zhen" (measles-like rash).)
[Wan Quan] Zhen is also known as Mazu (smallpox/measles), caused by Jun Huo (Ministerial Fire/Heart Fire). (Some say it is caused by the Spleen.) The Classic says: When Shaoyin (Lesser Yin) qi arrives, it manifests as sores and rashes; in the human body, Heart Fire governs it. If Heart Fire becomes hyperactive and extreme, it controls what it overcomes (Kidney Water), burning and scorching Lung Metal. Since the Lung governs skin and hair, the Zhen toxin appears between the skin layers, resembling the marks of mosquito or flea bites. Smallpox lesions appearing in a uniform manner are favorable; if they erupt simultaneously with Zhen toxin, it is called Jia Zhen (Smallpox complicated with Measles/Rash). This condition is extremely malignant. Only when the smallpox base is sparse while complicated by rash can it potentially be treated. If the smallpox is originally dense and erupts together with rash, mixing indistinguishably and intricately, urgent treatment with acrid-cool herbs to induce sweating and resolve the exterior is required. If the Zhen toxin gradually subsides and the smallpox remains distinct and clear, it can also be treated. When Rash and Smallpox appear together, the toxin does not decrease; this is a critical and dangerous disease, who can predict survival? For smallpox complicated by rash, Jingfang Baidu San is the primary prescription; once the rash toxin dissipates, it can be cured. If rash reappears after the smallpox crusts have fallen off, this is a sign that residual toxins are dispersing, and no treatment is necessary.
[Xue Ji] Zhen is an external pathogenic factor of Wind Evil, while Smallpox is an internal eruption of fetal toxin. When both conditions occur together, the Zang-Fu organs are all affected. When the two mix, red halos appear, and the smallpox becomes more vigorous. Mistaking this for excessively dense smallpox often leads to untreatable cases. However, this is actually Smallpox complicated by Rash. It should be treated with Renshen Qianghuo San. Once the rash toxin resolves, the smallpox trend recedes. If Qi and Blood are deficient, preventing crusting, the urgent priority is to tonify the Spleen and Stomach. [Weng Zhongren] When Dan Zhen (red rash) erupts within smallpox, specific treatment is not needed; the focus should be on supporting the expulsion of smallpox toxins. Once the smallpox erupts, the rash will naturally subside.
Jingfang Baidu San
Chai Hu (Bupleuri Radix), Gan Cao (Glycyrrhizae Radix et Rhizoma), Ren Shen (Ginseng Radix), Jie Geng (Platycodonis Radix), Chuan Xiong (Ligustici Chuanxiong Rhizoma), Fu Ling (Poria), Zhi Ke (Aurantii Fructus Immaturus), Qian Hu (Peucedani Radix), Qiang Huo (Notopterygii Rhizoma et Radix), Du Huo (Angelicae Pubescentis Radix), Jing Jie Sui (Schizonepetae Spica), Fang Feng (Saposhnikoviae Radix) (equal parts).
Crush these ingredients finely. Add five leaves of Bo He (Menthae Haplocalycis Herba), one cup of water, decoct until seven-tenths remain, remove dregs, and take warm.
Renshen Qianghuo San
Treats epidemic smallpox and rashes, with the additional function of releasing the exterior.
Ren Shen (Ginseng Radix), Qiang Huo (Notopterygii Rhizoma et Radix), Du Huo (Angelicae Pubescentis Radix), Chai Hu (Bupleuri Radix), Qian Hu (Peucedani Radix), Jie Geng (Platycodonis Radix), Fu Ling (Poria), Zhi Ke (Aurantii Fructus Immaturus), Chuan Xiong (Ligustici Chuanxiong Rhizoma), Tian Ma (Gastrodiae Rhizoma), Gan Cao (Glycyrrhizae Radix et Rhizoma), Di Gu Pi (Lycii Cortex) (each 3 fen).
Add five leaves of Bo He (Menthae Haplocalycis Herba), decoct with ginger-infused water, and take orally.
This formula is suitable for cases with predominant exterior symptoms.
Qinghe Yin
Di Gu Pi (Cortex Lycii, fresh preferred), Mai Men Dong (Ophiopogonis Tuber, heart removed, each 2 qian), Sheng Di Huang (Rehmanniae Radix), Zhi Mu (Anemarrhenae Rhizoma), Bei Mu (Fritillariae Cirrhosae Bulbus), Ju Hong (Citri Reticulatae Pericarpium Rubrum), Fu Ling (Poria), Gan Cao (Glycyrrhizae Radix et Rhizoma), Jing Jie Sui (Schizonepetae Spica, each 7 fen), Niu Bang Zi (Arctii Fructus, stir-fried and ground, 1.5 qian), Jie Geng (Platycodonis Radix, 5 fen), Quan Gua Lou (Trichosanthis Fructus, 1 qian).
This formula is suitable for cases with predominant interior symptoms. For deficiency patterns, add Ren Shen (Ginseng Radix) and Huang Qi (Astragali Radix).