韩光，治疔肿人也。贞观初，衢州徐使君访得此方。
用艾蒿一担烧作灰，于竹筒中淋取汁，以一二合和锻石如面浆，以针刺疮中至痛，即点
之，点三遍，其根自拔，亦大神良。贞观中用治三十余人，得瘥。故录之。
鱼脐疔疮，似新火针疮，四边赤中央黑，可针刺之，若不痛即杀人，治之方∶
以腊月鱼头灰和发灰等分，以鸡溏屎和敷上。此疮见之效否即杀人。（《外台》不用发
灰，用鸡子清和敷）。
又方 以寒食饧敷之良。若硬者，烧灰涂贴即瘥。
治鱼脐疮，头白肿痛不可忍者方∶
先以针刺疮四畔，捣白苣汁，滴着疮孔内。
又方 水獭屎敷，大良。
治赤根疔方
熬白粉令黑，蜜和敷之良。
又方 以新坌鼠壤，水和涂之，热则易。
又方 马牙齿捣末，腊月猪脂和敷之，根即拔。烧灰用亦可。
犯疔疮方∶
芜菁根 生铁衣（等分）
上二味和捣，以大针刺作孔，复削芜菁根如针大，以前生铁衣涂上刺孔中，又涂所捣者
封上，仍以方寸匕，绯帛涂粘贴。有脓出即易，须臾，拔根出立瘥。忌油腻、生冷、醋滑、
五辛、陈臭、粘食。
又方 刺疮头及四畔令汁尽出，捣生栗黄敷上，以面围之，勿令黄出，从旦至午，根拔
矣。
又方 以面围疮如前法，以针乱刺疮，铜器煮醋令沸，泻着面围中令容一盏，冷则易之，
三度，根即出。
又方 取蛇蜕皮如鸡子大，以水四升，煮三四沸，去滓，顿服，立瘥。
又方 烧蛇蜕皮灰，以鸡子清和涂瘥。
又方 取苍耳苗捣，取汁一二升服之，滓敷上，立瘥。
韩光，是治疗疔肿的专家。贞观初年，衢州徐使君寻访得到这个方子。
用艾蒿一担烧成灰，在竹筒中淋取汁液，取一两合（约20-40毫升）与锻石混合，调成如面浆般的稠度，用针刺破疮口至感到疼痛，随即点涂药液，点涂三遍后，疔疮的根就会自行脱落，此法非常神效良验。贞观年间用此方治疗三十多人，都痊愈了。因此记录下来。
鱼脐疔疮，形状像刚用火针灸过的疮，四周发红中间发黑，可以用针刺破它，如果患者感觉不到疼痛，就会致死。治疗方法如下：
用腊月里鱼头的灰和头发灰各等份，用鸡粪调和后敷在患处。这种疮如果见效与否直接决定生死。（《外台秘要》不用头发灰，改用鸡蛋清调和敷贴）。
另一个方子：用寒食饧（一种麦芽糖）敷贴效果良好。如果疮体变硬，烧成灰涂抹贴敷即可痊愈。
治疗鱼脐疮，头部白色、肿痛难以忍受的方子：
先用针刺破疮的四周，捣碎白苣菜取汁，滴入疮孔内。
治疗赤根疔的方子：
将白粉熬至变黑，用蜂蜜调和后敷贴，效果良好。
另一个方子：用新近鼠洞的土，加水调和后涂抹，发热了就更换。
另一个方子：将马牙齿捣成粉末，用腊月里的猪脂调和后敷贴，疔根就会拔出。烧成灰使用也可以。
治疗犯疔疮的方子：
芜菁根、生铁衣（即铁锈，两者等分）
以上两味药混合捣碎，用大针刺开疮口，再削芜菁根如针粗细，将前面的生铁衣涂上刺入孔中，再将捣碎的药末涂在上面并封住，仍用方寸匕大小的量，用红帛涂药后贴敷。有脓流出就更换，片刻之后，疔根拔出立即痊愈。忌食油腻、生冷、醋滑物、五辛、陈腐臭味食物及粘性食物。
另一个方子：刺破疮头及四周，让汁液流尽，捣碎生栗子黄敷在上面，用面粉围住疮口，不要让栗子黄漏出，从早晨到中午，疔根就会拔出。
另一个方子：用面粉围住疮口如前法，用针乱刺疮口，用铜器煮醋至沸腾，倒入面粉围成的圈中，容量约一盏，冷了则更换，三次之后，疔根就会出来。
另一个方子：取蛇蜕皮如鸡蛋大小，用水四升，煮三四沸，去渣，一次性服下，立即痊愈。
另一个方子：烧蛇蜕皮成灰，用鸡蛋清调和后涂抹，可愈。
Han Guang was an expert in treating Ding swellings (carbuncles/furuncles). In the early Zhen Guan era, Xu Shijun (Magistrate) of Quzhou sought out and obtained this prescription.
Burn one dan (approx. 60 kg) of mugwort (Artemisia argyi) to ash, leach the juice using a bamboo tube, mix one or two he (approx. 20-40 ml) with calcined stone (dust), blending it into a consistency like wheat paste. Puncture the sore with a needle until pain is felt, then apply the mixture. After three applications, the root of the lesion will naturally detach. This method is extremely effective and excellent. During the Zhen Guan era, it was used to treat over thirty people, all of whom recovered. Therefore, it is recorded here.
Fish-umbilicus Ding sores resemble burns from fresh fire needles: the surrounding area is red while the center is black. They can be punctured with a needle; if the patient feels no pain, death may ensue. The treatment prescription is as follows:
Mix equal parts of ash from fish heads collected in the twelfth lunar month and ash from human hair. Blend with chicken manure and apply to the affected area. Whether this sore shows efficacy or not determines life or death. (The *Waitai Miyao* does not use hair ash, but instead uses egg white for application).
Another prescription: Apply cold-food maltose (han shi tang); this is beneficial. If the lesion becomes hard, burn it to ash and apply the powder; recovery will follow.
Prescription for treating fish-umbilicus sores where the head is white, swollen, painful, and unbearable:
First, puncture the four sides of the sore with a needle. Crush white lettuce (Lactuca sativa) to extract juice, and drip it into the wound hole.
Another prescription: Apply water badger feces; this is highly effective.
Prescription for treating red-root Ding sores:
Roast white starch (bai fen) until black, blend with honey, and apply; this is beneficial.
Another prescription: Use soil from new rat burrows, mix with water, and apply. Change when it cools or heats up.
Another prescription: Crush horse teeth into powder, mix with lard rendered in the twelfth lunar month, and apply; the root will be extracted. Using ash after burning is also acceptable.
Prescription for treating Ding sores caused by external factors:
Radish root (Brassica rapa var. rapifera) and rusted iron (sheng tie yi, i.e., iron oxide) in equal parts.
Crush the above two ingredients together. Make a hole in the sore with a large needle. Shape the radish root to the size of a needle, coat it with the previously mentioned rusted iron, insert it into the hole, and cover with the crushed mixture. Seal the top. Apply a quantity equivalent to a square-inch spoonful, coated on red silk fabric, and patch it. Replace when pus discharges. Within a short time, the root will be extracted, and immediate recovery will occur. Avoid greasy, raw/cold, slippery/vinegary, five pungent spices, stale/odorous foods, and sticky foods.
Another prescription: Puncture the head of the sore and its surroundings to drain all fluids. Crush raw chestnut kernels and apply them. Surround the sore with flour paste to prevent leakage. From morning to noon, the root will be extracted.
Another prescription: Surround the sore with flour paste as before. Prick the sore randomly with a needle. Boil vinegar in a copper vessel until bubbling, pour it into the flour enclosure (capacity of one cup), and replace when cool. After three times, the root will emerge.
Another prescription: Take snake skin shed (she tui pi) the size of a chicken egg. Boil in four sheng (approx. 8 liters) of water for three to four boils. Strain the dregs and consume the liquid in one dose; immediate recovery will follow.
Another prescription: Burn snake skin shed to ash, mix with egg white, and apply; recovery will follow.
Another prescription: Crush cocklebur seedling (Cang Er miao) shoots, extract one to two sheng of juice, and drink it. Apply the dregs to the affected area; immediate recovery will follow.