According to *Chao Shi Bing Yuan* (Source of Diseases of Chao Yuanfang) regarding the syndrome of infant Yi-fang Huo Dan (Fire Erysipelas): The erysipelas erupts on the hip bone, presenting a bluish-black color, which is termed Yi-fang Huo Dan.
*Cranial Sutra* (*Lu Xin Jing*) records that Yi-fang Huo Dan originates from both hypochondriac regions.
For treatment, use the ash obtained by burning pig manure as described above, mix it with mud from an iron trough to form a paste, and apply it to the affected area three times daily.

Regarding the syndrome of Huo Dan (Fire Erysipelas) in infants in *Chao Shi Bing Yuan*: When the erysipelas erupts on the arms, back, or anus, it is called Huo Dan.
*Cranial Sutra* records that Huo Dan originates from the scapular region of the back.
For treatment, mix raw sesame oil with mud from under a pig trough as described above, and apply it to the affected area.
*Ying Ru Fang* (Formulas for Infants and Toddlers) records a method for treating Huo Dan originating from the back, which may spread to both feet, appearing red like fire.
Herbs: *Sedum aizoon* (Jingtian Cao, 10 liang); Pearl (Zhenzhu, 1 fen).
Mix the above herbs, pound them into a paste, and apply it to seal the erysipelas lesion.
*Ying Ru Fang* records a formula for the critical condition where erysipelas invades the abdomen and descends to the scrotum, noting that this condition is difficult to cure.
Herbs: *Ephedrae Herba* (Mahuang, stir-fried); *Cimicifugae Rhizoma* (Shengma, each 2 fen); Niter (Xiaoshi, 4 fen).
Pulverize the above herbs into powder. Administer one fang-cun bi (a square-inch measure) with well water drawn at dawn, three times daily. Another version uses *Rhei Radix et Rhizoma* (Dahuang, 0.5 fen).

Regarding the syndrome of Zhu Yu Huo Dan (Cornel Fire Erysipelas) in infants in *Chao Shi Bing Yuan*: The erysipelas initially erupts from the back, spreading over the whole body resembling fine patterns, which is termed Zhu Yu Huo Dan.
*Qian Jin Fang* (Essential Prescriptions Worth a Thousand Gold) records a formula for treating pediatric Zhu Yu Dan, where the illness starts from the back, spreads over the body like fine patterns, and forms sores overnight.
For treatment, pulverize Adzuki Bean (Chixiaodou) as described above and dust it on the lesion; if sores have not yet formed, mix it with egg white and apply it.

Regarding the syndrome of Chi Dan (Red Erysipelas) in infants in *Chao Shi Bing Yuan*: This refers to erysipelas presenting a pure red color, caused by the struggle between heat-toxin and blood qi.
*Tai Ping Sheng Hui Fang* (Holy惠民 Formulas of the Taiping Era) records: Pediatric Chi Dan is caused by severe wind-toxin, resulting in redness. Initially, rashes appear, large ones the size of linked coins, small ones the size of hemp seeds, with millet-grain-like bumps on the skin, colored like a rooster's comb; thus it is called Chi Dan, also known as Zhu Yu Dan.
*Qian Jin Fang* records a formula for treating pediatric Chi Dan.
For treatment, take the juice of *Brassica rapa* leaves (Yuntai Ye) as described above, administer 3 he internally, and apply the dregs externally for good effect. (*Qian Jin Yi Fang* states: Powder the Yuntai and mix with egg white for application.)
*Qian Jin Fang* records a formula for treating mottled pediatric Chi Dan.
For treatment, mix Chinese Lead White (Hufen) with saliva and apply from the outside inward.
Another formula from *Qian Jin Fang*.
For treatment, mix rust flakes (Tieshi) with lard and apply.
Another formula from *Qian Jin Fang*.
For treatment, mix roof dust with lard collected in the twelfth lunar month and apply.
*Bingbu Shouji* (Handbook of the Ministry of War) records a formula for persistent pediatric Chi Dan.
For treatment, mix Tufan Huangmi flour (Turkistan yellow millet flour) and egg white, and apply. (Huangmi flour refers to yellow millet flour.)
Another formula from *Bingbu Shouji*.
For treatment, mix buckwheat flour with vinegar and apply until healed.
Another formula from *Bingbu Shouji*.
For treatment, apply Coriander juice until healed. Tan Shi's formula is identical.
Another formula from *Bingbu Shouji*.
For treatment, grind millet and apply.
*Sheng Hui Fang* records the Shengma Ointment formula for treating pediatric Chi Dan with toxic swelling.
Herbs: *Cimicifugae Rhizoma* (Chuan Shengma), *Ampelopsis Radix* (Bailian), *Euphorbiae Humifusae Radix* (Loulu), *Natrii Sulfas* (Chuan Mangxiao) (each 1 liang); *Scutellariae Radix* (Huangqin), *Aurantii Fructus* (Zhike), *Forsythiae Fructus* (Lianqiao), *Omphalodes Radix* (Sheyan) (each 1.5 liang); *Gardeniae Fructus* (Zhizi Ren), *Polygoni Multiflori Caulis* (Shuodi) (each 2 liang).
Finely chop the above herbs. Add 1.5 jin of lard into a cauldron. Slowly boil the herbs until they turn red. Strain out the dregs, let cool, and store in a porcelain jar. Apply as needed.
*Sheng Hui Fang* records a prescription for sudden onset of Chi Dan on the face and body in children, accompanied by itching or swelling. If not treated promptly, it can be fatal. Use this formula.
For treatment, take 8 liang of sheep horn scales, add 5 sheng of water, and decoct until 1 sheng remains. Filter through silk to remove dregs, add 5 liang of refined lard, mix evenly, and massage onto the affected area.
Another formula from *Sheng Hui Fang*.
For treatment, lightly crush the vine of *Holboella latifolia* (Gele Man), grind *Terminalia chebula* (Helile) with vinegar, and apply for excellent results.
*Ying Ru Fang* records a formula for treating mottled pediatric Chi Dan.
For treatment, wash Polygonum seeds (Liaozi) in water, then apply Polygonum herb.
Another formula from *Ying Ru Fang*.
For treatment, pulverize Plantago seed (Cheqianzi) and dust it on the lesion.
Another formula from *Ying Ru Fang*.
For treatment, boil silkworm excrement (Can Sha) in 2 sheng of water to extract the juice, and wash the affected area.
Zhang Huan's Shengma Ointment formula treats early-stage Chi Dan, where the flesh color is vermilion, like a rooster's comb, also known as Zhu Yu Dan.
Herbs: *Cimicifugae Rhizoma* (Chuan Shengma), *Ampelopsis Radix* (Bailian), *Euphorbiae Humifusae Radix* (Loulu), *Natrii Sulfas* (Chuan Mangxiao) (each 1 fen); *Forsythiae Fructus* (Lianqiao), *Gardeniae Fructus* (Zhizi Ren) (each 0.5 liang).
Finely chop the above herbs. Add half a jin of lard into a cauldron. Slowly boil the herbs until they turn red. Strain out the dregs, let cool, and store in a porcelain jar. Take a small amount each time and apply to the affected area.
*Zhuang Shi Jia Chuan* (Family Traditions of the Zhuang Family) records the Shuilun San powder formula for treating pediatric erysipelas flowing like flames, red and hot.
For treatment, bake Red-legged Centipede (Chijiao Wugong) on a tile over slow fire until dry, pulverize it, add a small amount of powdered sulfur (Shiliu), mix with fresh well water, and sweep the head with a goose feather until the area turns blackish-brown, then stop.