此症在胯眼下有结核，初如弹子大，渐扩张大至鸡卵状，不甚痛。初起时服中九丸兼
金蚣丸，外贴麻凉膏，即可内消；如不消时，可再以五虎下西川法主之∶
蜈蚣 全蝎 僵蚕 蝉蜕 山甲 当归 赤芍 黄芩 栀子 连翘
枳壳 银花 防风 荆芥 生地 木通 猪苓 二丑 大黄 芒硝 黄连 白芷 甘草
上水煎空心服，日三次，其毒自消。如作脓时，以上肚角疽之排脓剂服之，或在放脓
时以化肉膏贴之，至穿头时洗以熏洗汤，贴以解毒膏；脓尽后，用天然散以平口、生肌，
须忌发物。
此症生于胯间，与便毒相似，惟便毒圆而鱼口长，是其不同处，溃后则形同鱼口，故
有是名。治法亦如便毒，敷服熏贴，生肌、平口。
山甲（三大片炒） 归尾（三钱） 大黄（三钱） 僵蚕（一钱炒） 黑丑（一钱） 土木鳖（三个）
甘草节（三钱）
上以酒水各一盅，煎至八分时，空心服之，渣再煎服，俟便利四次后，食稀粥以补
之。除黄甲串外，九龙丹亦为内消鱼口良方，过去重庆某医曾以此方制成“鱼口内消丸”
成药出售，获利不资，且有不少同道购作诊室常用品，其着有疗效可知。
九龙丹
木香 乳香（制） 没药（制） 儿茶 血竭（另研） 巴豆（去油不去心各等分）
上研末，以生蜜调成一块，瓷器收贮。临用时丸如豌豆大，每服一丸，空腹时热酒送
服。又一本云∶丸如绿豆大，每服九丸，故名“九龙丹”。以编者过去经验，一粒似太
少，九粒又嫌过多，大都视患者体质强弱、以三丸至七丸为最适当；但偶尔也有用到九丸
的，病势减退虽快，而患者有下利不休副作用，是不免过分吃苦耳。
又文叔来外科摘录中之九龙丹方，与此小有不同，专治鱼口便毒，悬痈横 ，初起未
成脓者宜服，方为儿茶、血竭、乳香、没药、木香、甲珠各一两，共为末，以归尾三
两，红花二两，酒煎膏，和丸如梧子大，每服二钱，空心热酒送服，数服自溃。余意便
毒既成，在未化脓时，必须用快刀斩乱麻手段以杀其势，使不化脓，今将猛烈峻泻之巴
豆除去，似失其制方意义，但用归尾、红花煎膏和丸部分，殊属可取。
编者临症上常用家传之“鱼口内消丸”治便毒，效力极为确实稳妥，特将其方介绍如次∶
黄柏 荆芥 防风 花粉 蝉蜕 蒺藜 木通 槐子 山甲 斑蝥（各等分）
蜈蚣 全蝎 黑砂（较前药分量加倍）
上研末，为丸如梧子大，每服二十丸，热黄酒送服。
此病证在胯骨下方出现结核，初起时如弹丸大小，逐渐扩大至鸡蛋大小，疼痛不明显。初起阶段服用中九丸并配合金蚣丸，外部贴敷麻凉膏，即可使肿块从内部消散；如果未能消散，可再次采用“五虎下西川”法为主进行治疗：蜈蚣、全蝎、僵蚕、蝉蜕、穿山甲、当归、赤芍、黄芩、栀子、连翘、枳壳、金银花、防风、荆芥、生地黄、木通、猪苓、二丑（牵牛子）、大黄、芒硝、黄连、白芷、甘草。以上药材加水煎煮，空腹服用，每日三次，毒邪自然消散。如果化脓，则服用上述治疗肚角疽的排脓剂，或在切开排脓时贴敷化肉膏，直到破溃流脓时用熏洗汤清洗，并贴敷解毒膏；脓液排尽后，使用天然散来平复疮口、促进肌肉生长，必须忌食发物。
此病证生于两腿之间，与便毒相似，只是便毒呈圆形而鱼口呈长形，这是它们的不同之处，溃烂后形状如同鱼口，因此得名。治疗方法也与便毒相同，包括外敷、内服、熏蒸和贴敷，旨在生肌和平复疮口。穿山甲（炒制三大片）、当归尾（三钱）、大黄（三钱）、僵蚕（炒制一钱）、黑丑（一钱）、土木鳖（三个）、甘草节（三钱）。以上药材用酒和水各一盅，煎至八分满时，空腹服用，药渣再次煎煮服用，待大便通畅四次后，食用稀粥以补益身体。除了黄甲串之外，九龙丹也是内消鱼口的良方，过去重庆某位医生曾将此方制成“鱼口内消丸”成药出售，获利丰厚，且有不少同行购买作为诊室常备药，其疗效显著可知。
九龙丹：木香、乳香（制）、没药（制）、儿茶、血竭（另研）、巴豆（去油但保留心，各等分）。以上药材研成细末，用生蜜调和成一块，存放在瓷器中密封保存。临用时制成豌豆大小的丸剂，每次服用一丸，空腹时用热酒送服。另一版本记载：制成绿豆大小的丸剂，每次服用九丸，因此名为“九龙丹”。根据编者过去的经验，一粒似乎太少，九粒又嫌过多，大多视患者体质的强弱，以三丸至七丸最为适当；但偶尔也有用到九丸的情况，虽然病势减退很快，但患者会出现腹泻不止的副作用，未免过于痛苦。
另外文叔来《外科摘录》中的九龙丹方与此略有不同，专门治疗鱼口、便毒、悬痈、横痃，初起未化脓者适宜服用，方剂由儿茶、血竭、乳香、没药、木香、甲珠各一两组成，共为细末，用当归尾三两、红花二两，酒煎成膏，调和药末制成梧桐子大小的丸剂，每次服用二钱，空腹时用热酒送服，数服之后自会溃破。我认为便毒既然已经形成，在未化脓时，必须用快刀斩乱麻的手段来遏制其势头，使其不化脓，现在将猛烈峻泻的巴豆除去，似乎失去了制方的本意，但使用当归尾、红花煎膏和丸的部分，确实值得采纳。
编者在临床常用家传的“鱼口内消丸”治疗便毒，效力极为确切稳妥，特将其方介绍如下：黄柏、荆芥、防风、天花粉、蝉蜕、蒺藜、木通、槐子、穿山甲、斑蝥（各等分）、蜈蚣、全蝎、黑砂（较前药分量加倍）。以上药材研成细末，制成梧桐子大小的丸剂，每次服用二十丸，用热黄酒送服。
This condition presents with a nodule below the groin. Initially, it is as large as a bullet, gradually expanding to the size of an egg, with little pain. At the onset, taking Zhongjiu Wan (Nine-Pill Decoction) along with Jinfeng Wan (Golden Centipede Pill), and applying Maliang Gao (Hemp and Coolant Ointment) externally can lead to internal resolution; if it does not resolve, the "Five Tigers Descend from Western Sichuan" method should be primarily employed: Geckus (Wugong), Scorpion (Quanxie), Bombyx Batryticatus (Jiangcan), Cicada Slough (Chantui), Pangolin Scales (Shanjia), Angelicae Sinensis Radix (Danggui), Red Peony Root (Chishao), Scutellariae Radix (Huangqin), Gardeniae Fructus (Zhizi), Forsythiae Fructus (Lianqiao), Aurantii Fructus (Zhiqiao), Lonicerae Japonicae Flos (Yinhua), Saposhnikoviae Radix (Fangfeng), Schizonepetae Herba (Jingjie), Rehmanniae Radix (Shengdi), Akebiae Caulis (Mutong), Polyporus (Zhuling), Pharbitidis Semen (Erchou), Rheomi Radix et Rhizoma (Dahuang), Mirabilite (Mangxiao), Coptidis Rhizoma (Huanglian), Angelicae Dahuricae Radix (Baizhi), Glycyrrhizae Radix et Rhizoma (Gancao). Decoct these ingredients in water and take on an empty stomach, three times daily, and the toxicity will naturally dissipate. If suppuration occurs, take the pus-draining agent for Dujuo Ju (Abdominal Corner Carbuncle) mentioned above, or apply Huarou Gao (Flesh-Transforming Ointment) during incision and drainage; when the head breaks, wash with Xunxi Tang (Fumigation and Washing Decoction) and apply Jiedu Gao (Detoxifying Ointment); after the pus is exhausted, use Tianran San (Natural Powder) to level the wound and generate flesh, while avoiding triggering foods.
This condition arises between the thighs, resembling Biandu (Groin Abscess), but Biandu is round while Yukou (Fish Mouth) is elongated, which is their difference; after ulceration, the shape resembles a fish mouth, hence the name. The treatment method is also similar to Biandu, involving external application, internal administration, fumigation, and pasting, aiming to generate flesh and level the wound. Pangolin Scales (three large slices, stir-fried), Angelicae Sinensis Radix Tail (San Qian), Rheomi Radix et Rhizoma (San Qian), Bombyx Batryticatus (Yi Qian, stir-fried), Black Pharbitidis Semen (Yi Qian), Elaeocarpus Chinensis Seed (Tu Shimie, three pieces), Glycyrrhizae Radix et Rhizoma Node (San Qian). Decoct these in one cup of wine and one cup of water until reduced to eight-tenths, take on an empty stomach, decoct the dregs again and take, wait until there are four bowel movements, then consume thin porridge to replenish. Besides Huangjia Chuan, Jiulong Dan (Nine Dragons Pill) is also an excellent formula for internal resolution of Yukou. In the past, a certain doctor in Chongqing manufactured this formula into "Yukou Neixiao Wan" (Yukou Internal Resolution Pill) for sale, making considerable profit, and many colleagues purchased it as a common clinic item, indicating its efficacy.
Jiulong Dan: Costus Root (Muxiang), Frankincense (Ruxiang, processed), Myrrh (Moyao, processed), Catechu (Ercha), Dragon's Blood (Xuexie, ground separately), Croton Seed (Badou, oil removed but heart retained, equal parts). Grind all into powder, mix with raw honey to form a mass, store in porcelain. When needed, roll into pills the size of peas, take one pill per dose, swallow with hot wine on an empty stomach. Another version states: roll into pills the size of mung beans, take nine pills per dose, hence the name "Nine Dragons Pill". Based on the editor's past experience, one pill seems too few, nine pills seem too many; generally, three to seven pills are most appropriate depending on the patient's constitution strength; occasionally nine pills are used, although the disease recedes quickly, the patient suffers from side effects like incessant diarrhea, which is unnecessarily painful.
Another Jiulong Dan formula from Wen Shulai's *Surgery Excerpts* differs slightly, specifically treating Yukou, Biandu, Xuan Yong (Hanging Perineum Abscess), and Heng Xuan (Horizontal Groin Swelling), suitable for those in the early stage without suppuration. The formula consists of Catechu, Dragon's Blood, Frankincense, Myrrh, Costus Root, and Pangolin Scales, each one liang, ground together. Mix with a paste made from decocting three liang of Angelicae Sinensis Radix Tail and two liang of Carthami Flos in wine, roll into pills the size of mustard seeds, take two qian per dose, swallow with hot wine on an empty stomach, and it will spontaneously ulcerate after several doses. I believe that once Biandu has formed, before suppuration, drastic measures must be taken to suppress its momentum and prevent suppuration. Removing the harsh purgative Badou seems to lose the original intent of the formula, but the part using Angelicae Sinensis Radix Tail and Carthami Flos decocted in wine to make pills is indeed commendable.
In clinical practice, the editor often uses the family heirloom "Yukou Neixiao Wan" to treat Biandu, with extremely reliable and safe efficacy. The formula is introduced as follows: Phellodendri Cortex (Huangbai), Schizonepetae Herba (Jingjie), Saposhnikoviae Radix (Fangfeng), Trichosanthis Radix (Huafen), Cicada Slough (Chantui), Tribuli Fructus (Jili), Akebiae Caulis (Mutong), Sophorae Flavescentis Semen (Huaizi), Pangolin Scales (Shanjia), Mustard Beetle (Banmao, equal parts), Geckus (Wugong), Scorpion (Quanxie), Black Sand (Heisha, double the dosage of previous herbs). Grind all into powder, roll into pills the size of mustard seeds, take twenty pills per dose, swallow with hot yellow wine.