The eruption of measles should be thorough; fine, dense, and red-radiant spots indicate a favorable prognosis. If the eruption is not thorough, one must differentiate the etiology: wind-cold, toxic heat, or qi deficiency. For wind-cold, use Shengma Gegen Tang (Cinnamon Twig and Kudzu Root Decoction) with modifications; for toxic heat, use Sanhuang Shigao Tang (Three Yellows and Gypsum Decoction); for qi deficiency, use Renshen Baidu San (Ginseng Detoxification Powder). These formulas effectively support the interior to promote the eruption of rashes.

Note: During the manifestation stage of measles, thoroughness is prized; fine, dense, and red-radiant spots after eruption are excellent. If the eruption is not thorough, the cause must be investigated. In cases of wind-cold obstruction, symptoms such as fever, absence of sweating, headache, nausea/vomiting, and pale-red yet dark rash spots will occur. Use Shengma Gegen Tang (Cinnamon Twig and Kudzu Root Decoction) added with Perilla Leaf (Ziye), Ligusticum Chuanxiong Rhizome (Chuanxiong), and Arctii Fructus (Niubangzi). In cases of toxic heat stagnation, symptoms such as facial redness, fever, delirium, irritability, thirst, and crimson-purple, stagnant, and dark rash spots will occur. Use Sanhuang Shigao Tang (Three Yellows and Gypsum Decoction). In cases where righteous qi is weak and unable to expel toxins outward, symptoms such as pale complexion, slight fever, mental fatigue, and white, non-red rash spots will occur. Treat primarily with Renshen Baidu San (Ginseng Detoxification Powder).

Shengma Gegen Tang (Cinnamon Twig and Kudzu Root Decoction)
Rhizoma Cimicifugae (Shengma)
Puerariae Lobatae Radix (Gegen)
Radix Paeoniae Rubra (Chishao)
Raw Glycyrrhizae Radix et Rhizoma (Shenggancao)
Decoct with Coriandri Herba (Yansui) water for administration.
Prescription Song: For fever, Shengma Gegen Tang; it addresses both exterior pathogens and vaccine/measles eruptions. With Shengma, Gegen, Chishao, and Gancao, modifying according to syndrome is best.

Sanhuang Shigao Tang (Three Yellows and Gypsum Decoction)
Ephedrae Herba (Mahuang)
Gypsum Fibrosum (Shigao)
Fermented Soybean (Dandouchi)
Phellodendri Cortex (Huangbai)
Coptidis Rhizoma (Huanglian)
Gardeniae Fructus (Zhizi)
Scutellariae Radix (Huangqin)
Decoct in water for administration.
Prescription Song: Eruption incomplete due to toxic heat, seek Sanhuang Shigao Tang urgently. Mahuang, Shigao, Dandouchi, Huangbai, Huanglian, Zhizi, and Huangqin.

Renshen Baidu San (Ginseng Detoxification Powder)
Ginseng Radix et Rhizoma (Renshen)
Ligusticum Chuanxiong Rhizoma (Chuanxiong)
Notopterygii Rhizoma et Radix (Qianghuo)
Atractylodis Macrocephalae Rhizoma? No, Atractylodes Dispersing Rhizome (Duhuo - *Correction*: Dictamni Radix or Angelica Pubescens Radix depending on context, usually Dictamni Radix for Duhuo in this formula context implies Angelicae Pubescentis Radix) -> Actually standard is Dictamni Radix (Baiwei) vs Angelicae Pubescentis Radix (Duhuo). Here it is Duhuo.
Peucedani Radix (Qianhu)
Aurantii Fructus Immaturus (Zhike) - Bran-fried
Platycodonis Radix (Jiegeng)
Bupleuri Radix (Chaihu)
Raw Glycyrrhizae Radix et Rhizoma (Shenggancao)
Poria Cocos (Chiling)
Decoct with Zingiberis Rhizoma Recens (Shengjiang) water for administration.
Prescription Song: Rash difficult to erupt due to qi deficiency, Renshen Baidu San has miraculous merit. Renshen, Chuanxiong, Qianghuo, Duhuo, Qianhu, Zhike, Jiegeng, Chaihu, Gancao, Chiling Fuling.

After three days of eruption, the rash should recede; neither too fast nor too slow ensures safety. If receding too quickly, toxins attack inward; if failing to recede when they should, treat deficient heat. For excess toxicity, use Jingfang Jiedu Tang (Schizonepeta and Saposhnikovia Detoxification Decoction); externally, apply Huisu Jiu (Coriander Wine) method. For deficient heat, use Chaihu Siwu Tang (Bupleurum Four Substances Decoction); apply according to syndrome, and the disease will gradually depart.

Note: Three days after the manifestation of measles, the rash should gradually fade. Neither rapid nor slow fading indicates health. If the rash recedes within one or two days, this is too rapid. This results from improper care, invasion by wind-cold, or contact with pathogenic filth, causing toxins to counter-attack inward. Mild cases present with irritability, thirst, delirium, and mania; severe cases present with coma, confusion, and restlessness. Urgently administer Jingfang Jiedu Tang (Schizonepeta and Saposhnikovia Detoxification Decoction) internally. Externally, fumigate clothing and bedding with Huisu Jiu (Coriander Wine) to encourage the rash to re-emerge, ensuring safety. "Failing to recede when it should" refers to deficient heat lingering in the muscle layer. Symptoms include tidal fever, irritability, thirst, dry mouth, and dry throat. Do not solely use cold-cooling agents. Treat with Chaihu Siwu Tang (Bupleurum Four Substances Decoction) to harmonize the blood level, eliminate residual heat, and allow the rash to recede.

Jingfang Jiedu Tang (Schizonepeta and Saposhnikovia Detoxification Decoction)
Menthae Haplocalycis Herba (Boheye)
Forsythiae Fructus (Lianqiao) - Heart removed
Schizonepetae Spica (Jingjiesui)
Saposhnikoviae Radix (Fangfeng)
Scutellariae Radix (Huangqin)
Coptidis Rhizoma (Huanglian)
Arctii Fructus (Niubangzi) - Stir-fried and ground
Isatidis Folium (Daqingye)
Cornu Rhinocerotis (Xijiao)
Humanus Faeces Praeparatus (Renzhonghuang)
Decoct with Junci Medulla (Dengxin) and Phragmitis Rhizoma (Lugen) water for administration.
Prescription Song: Receding too fast causes toxin internal attack, Jingfang Jiedu Tang treats most effectively. Bohe, Lianqiao, Jingjie, Fangfeng, Huangqin, Huanglian, Niubangzi, Daqingye, Xijiao, Renzhonghuang.

Huisu Jiu (Coriander Wine)
Coriandri Fructus (Huisui) - 4 liang, chopped
Yellow Rice Wine (Huangjiu) - 0.5 jin
Simultaneously decoct without allowing vapor to escape.

Chaihu Siwu Tang (Bupleurum Four Substances Decoction)
Paeoniae Radix Alba (Baishao) - Stir-fried
Angelicae Sinensis Radix (Danggui)
Ligusticum Chuanxiong Rhizoma (Chuanxiong)
Rehmanniae Radix Preparata (Shengdi)
Ginseng Radix et Rhizoma (Renshen)
Bupleuri Radix (Chaihu)
Lophatheri Herba (Danzhuye)
Bark of Ground Cherry Root (Digupi)
Anemarrhenae Rhizoma (Zhimu) - Stir-fried
Scutellariae Radix (Huangqin)
Ophiopogonis Tuber (Maidong) - Heart removed
Decoct with Zingiberis Rhizoma Recens (Shengjiang) and Jujubae Fructus (Hongzao) water for administration.
Prescription Song: Failing to recede due to deficient heat, Chaihu Siwu contains Baishao, Danggui, Chuanxiong. Shengdi, Renshen, Chaihu, Danzhuye, Digupi, Zhi Mu, Huangqin, Maidong.