《颅囟经》∶天雷丹从头项起。
上用阴干葱、赤末拌脂涂。又用灶下土、鸡子白调涂。
《巢氏病源》小儿天火丹候∶丹发遍身体，斑赤如火之烧，故谓之天火丹也。
《圣惠》∶夫小儿丹发肉中，有赤如丹，赤色大者如手，剧者遍身赤痒，故号天火丹也。
《颅囟经》天火丹从腹背遍身起方。
上用桦皮白末和，生油调涂之。亦用赤石脂、羊脂调涂之。
《千金》治小儿天火丹，肉中有赤如丹色，大者如手，甚者遍身。或痛、或痒、或肿方。
上用赤小豆二升末之，鸡子白和如薄泥，敷之，干则易。一切丹并用此方皆便瘥。
《千金》又方
上生麻油涂之。
《圣惠》治小儿天火丹，发遍身，赤如绛色，宜用此方。
麻油（五合） 生鲫鱼（半斤）
上件药，捣如泥，涂在丹上，燥复涂之。
《圣惠》又方
虎脂（二两） 黄丹（一两）
上件药研为膏涂之即瘥。
《圣惠》又方
上以鬼目捣，绞取汁，涂赤处。
《圣惠》又方
上捣荏子汁涂之。
《圣惠》又方
上取小儿埋胞衣饼子中水一、二合与儿服，及涂身上有毒处。
张涣丹参散方 治丹发遍身，赤如绛色，痒痛甚者乃名天火丹。
丹参 桑根白皮（各一两） 甘菊花 莽草（各一两）
上捣为粗末。每用药三匙头，以水三碗煎至两碗去滓，看冷暖，避风处浴儿。（《圣惠》、《婴孺》皆同。《圣惠》以菊
花为一两半）
The *Lunxin Jing* (Classic of the Cranium and Fontanelle) records: Tianlei Dan (Heavenly Thunder Erythema) begins from the head and neck.
For the above, use sun-dried scallions mixed with red powder and animal fat to apply externally. Alternatively, mix kiln bottom soil with egg white for topical application.
In the *Chao Shi Bing Yuan* (Source of Diseases in Children by Chao Yuanfang), regarding the syndrome of Tianhuo Dan (Heavenly Fire Erythema) in children: The erythema spreads over the entire body, appearing as red patches burning like fire, hence it is called Tianhuo Dan.
According to *Taiping Shenghui Fang* (Prescriptions of Benevolent Sages): In children, erythema erupts within the flesh, appearing red like cinnabar; when the red area is large, it may be as big as a hand; in severe cases, the whole body becomes red and itchy, thus named Tianhuo Dan.
From *Lunxin Jing*, a prescription for Tianhuo Dan starting from the abdomen and back and spreading over the body:
Use birch bark white powder mixed with raw oil for topical application. One may also use litharge and sheep fat mixed for application.
From *Qianjin Fang* (Essential Prescriptions Worth a Thousand Gold), treating Tianhuo Dan in children where redness like cinnabar appears in the flesh, large areas as big as a hand, or in severe cases covering the whole body, accompanied by pain, itching, or swelling:
Take two sheng of adzuki beans, grind into powder, mix with egg white to form a thin paste, apply topically, and change when dry. This prescription is convenient and effective for all types of erythema.
Another prescription from *Qianjin Fang*:
Apply raw sesame oil topically.
From *Taiping Shenghui Fang*, treating Tianhuo Dan in children spreading over the body with redness like crimson color, this prescription is suitable:
Sesame oil (five he) and fresh crucian carp (half jin).
Grind these ingredients into a paste and apply to the erythema; reapply when it dries.
Another prescription from *Taiping Shenghui Fang*:
Tiger fat (two liang) and lead tetroxide (one liang).
Grind these ingredients into an ointment and apply; recovery will follow.
Another prescription from *Taiping Shenghui Fang*:
Mash guimu (fruit of Euonymus), squeeze out the juice, and apply to the red areas.
Another prescription from *Taiping Shenghui Fang*:
Crush renzi (perilla seeds) to extract juice and apply.
Another prescription from *Taiping Shenghui Fang*:
Collect the water from the burial pit of a child's placenta wrapped in a cake, give one or two he to the child to drink, and also apply to toxic areas on the body.
Zhang Huan's Danshen San (Salvia Powder) prescription: Treats erythema spreading over the body, red as crimson, with severe itching and pain, which is named Tianhuo Dan.
Danshen (Salvia miltiorrhiza root), Sanggen Baipi (Cortex Mori), Gan Juhua (Chrysanthemum flower), Mangcao (Agastache rugosa herb) (each one liang).
Grind into coarse powder. For each dose, take three spoonfuls, decoct in three bowls of water until reduced to two bowls, strain, check temperature, and bathe the child in a wind-free place. (Both *Taiping Shenghui Fang* and *Yingru* agree. *Taiping Shenghui Fang* uses one and a half liang of chrysanthemum.)