论曰小儿气血纯阳，肌肉柔脆，风毒邪热，易以致伤。若营气不从，逆于肉理，结成悍
毒疼
痛肿 非常，故名恶疮，其候或痒或痛，或赤根隐肉，硬不作脓，或穿穴作脓，久不得瘥，
治法随内外证疗之，则疮可愈。
治小儿恶疮。铅丹膏方
铅丹（十两） 风化锻石 猪脂（各一斤）
上三味，将二味同研细，以猪脂搜作饼，火烧通赤。如此五度，药成捣罗为末，湿疮干
贴，如干疮，即作膏，用猪脂调纸上贴。
治小儿恶疮。大黄汤洗方
大黄（生锉） 黄连（去须） 黄芩（去黑心） 泽兰 白矾枯 石楠（各一两） 戎
盐（一分） 蛇床子（炒三合）
上八味，粗捣筛，每以二两用水三升，煮取二升，去滓适寒温，以绵絮纳汤中，蘸洗之
，日三。
治小儿恶疮。茵芋汤浴方
茵芋（一两） 甘草（锉） 苦参（各三两） 细辛（去苗叶） 黄连（去须各二两） 蕤
仁（二十枚去皮） 上六味，粗捣筛，每以三两用水五升浸汁，煮取三升，去滓浴儿，逐日
用。
治小儿恶疮，遍身如麻豆状，包裹脓汁，乍痛乍痒。甘草散方
胡粉（炒令黄色五两） 黄连（去须） 黄柏（去粗皮锉各三两）
上三味，捣罗二味为散，与胡粉相和，一处研匀，敷疮上，日再，立验。
又方
豆豉（炒黄一合）
上一味，捣罗为末，敷疮上。
又方
虾蟆（一枚烧灰）
上一味，捣罗为细散，入麝香一分，一处同研匀，干敷疮上。
又方
柳枝叶（三握锉）
上一味，用水五升，煮至三升，去滓入盐少许，淋洗疮上。
治小儿头上恶疮，黄粉膏方
胡粉 黄连末（各一两） 水银（三分） 糯米（二十二粒研） 赤小豆（十四粒和黄
连捣）
上五味，先将水银于手掌中唾研化后，即以麻油调药，入水银和匀，涂疮上。
Discussion states: Children's qi and blood are of a pure yang nature, their muscles are soft and fragile, making them susceptible to injury from wind-toxin and pathogenic heat. If Ying (nutritive) qi does not flow smoothly and rebels within the muscle tissue, condensing into fierce, toxic swelling and pain with abnormal manifestations, it is thus named "E Chuang" (Malignant Ulcer). Its symptoms may include itching or pain, red roots hidden within the flesh, hardness without suppuration, or perforation with pus formation, persisting for a long time without healing. The treatment method should follow the internal and external syndromes for therapy, so that the ulcer can be cured.
For treating E Chuang in children. Qian Dan Gao (Lead Tallow Ointment) Formula:
Qian Dan (Lead Carbonate, 10 liang), Feng Hua Duan Shi (Weathered Calcined Alun Stone), Zhu Zhi (Pig Fat) (each 1 jin).
Take the above three ingredients, grind the first two together into fine powder, mix with pig fat to form cakes, and burn over fire until thoroughly red. Repeat this process five times. After the medicine is prepared, pound and sieve into powder. For wet ulcers, apply dry; for dry ulcers, make into an ointment, mix with pig fat, spread on paper, and apply as a patch.
For treating E Chuang in children. Da Huang Tang (Rhubarb Decoction) Wash Formula:
Da Huang (Raw Rhubarb, cut), Huang Lian (Coptis Rhizome, remove stamens), Huang Qin (Scutellaria Root, remove black heart), Ze Lan (Lycopus Herb), Bai Fan Ku (Alum, calcined), Shi Nan (Photinia Leaf), Rong Yan (Rock Salt), She Chuang Zi (Cnidium Fruit, stir-fried) (each 1 liang; Rong Yan 1 fen; She Chuang Zi 3 he).
Coarsely crush and sieve the above eight ingredients. Take 2 liang per dose, add 3 sheng of water, decoct to obtain 2 sheng of liquid. Remove the dregs, adjust to a suitable temperature, dip cotton wool into the solution, and wash the affected area. Do this three times a day.
For treating E Chuang in children. Yin Yu Tang (Epimedium Decoction) Bath Formula:
Yin Yu (Epimedium Herb, 1 liang), Gan Cao (Licorice Root, cut), Ku Shen (Sophora Root) (each 3 liang), Xi Xin (Asarum Root, remove seedlings and leaves), Huang Lian (Coptis Rhizome, remove stamens) (each 2 liang), Rui Ren (Prunus Persica Kernel, 20 pieces, remove skin).
Coarsely crush and sieve the above six ingredients. Take 3 liang per dose, soak in 5 sheng of water to extract juice, decoct to obtain 3 sheng. Remove dregs and use for bathing the child. Use daily.
For treating E Chuang in children, where the whole body presents with lesions like hemp seeds or beans, wrapped in pus, alternating between pain and itching. Gan Cao San (Licorice Powder) Formula:
Hu Fen (Basic Lead Carbonate, stir-fried until yellow, 5 liang), Huang Lian (Coptis Rhizome, remove stamens), Huang Bo (Phellodendron Bark, remove coarse skin and cut) (each 3 liang).
Pound and sieve the latter two ingredients into powder, mix with Hu Fen, grind uniformly together, and apply to the ulcer. Apply twice a day; immediate effect is expected.
Another formula:
Dou Chi (Fermented Soybean, stir-fried until yellow, 1 he).
Pound and sieve this single ingredient into powder and apply to the ulcer.
Another formula:
Xia Ma (Toad, one piece, burned to ash).
Pound and sieve this single ingredient into fine powder, add 1 fen of She Xiang (Musk), grind uniformly together, and apply dry to the ulcer.
Another formula:
Liu Zhi Ye (Willow Branch and Leaves, three handfuls, cut).
Decoct this single ingredient in 5 sheng of water until reduced to 3 sheng. Remove dregs, add a little salt, and pour/wash over the ulcer.
For treating E Chuang on the head of children. Huang Fen Gao (Yellow Powder Ointment) Formula:
Hu Fen (Basic Lead Carbonate), Huang Lian Mo (Coptis Powder) (each 1 liang), Shui Yin (Mercury, 3 fen), Nuo Mi (Glutinous Rice, 22 grains, ground), Chi Xiao Dou (Red Adzuki Bean, 14 grains, pounded with Huang Lian).
First, grind the mercury in the palm of the hand with saliva until dissolved. Then, mix the medicine with Ma You (Sesame Oil), incorporate the mercury, blend uniformly, and apply to the ulcer.