【方歌】旋耳疮生耳后缝，疮延上下连耳疼，状如刀裂因湿热，
穿粉散搽即成功。
【注】此证生于耳后缝间，延及耳折，上下如刀裂之状，色红
时津黄水，由胆、脾湿热所致。然此疮月盈则疮盛，月
亏则疮衰，随月盈亏，是以又名月蚀疮也。宜穿粉散搽
之，即可成功。
方剂：穿粉散
组成：轻粉（研，隔纸微炒） 穿山甲（炙）
铅粉 黄丹（水飞过，各三钱）
共研极细末，香油调敷。
【方歌】穿粉散敷旋耳疮，清热渗湿油调良，轻粉研细隔纸炒，
穿山甲共铅粉黄。
【方歌】大人口破分虚实，艳红为实淡红虚，实则满口烂斑肿，
虚白不肿点微稀。
【注】此证名曰口疮，有虚火实火之分。虚火者，色淡红，满
口白斑微点，甚者陷露龟纹，脉虚不渴，此因思虑太过
，多醒少睡，以致心肾不交，虚火上炎，宜服四物汤加
黄柏、知母、丹皮，少佐肉桂以为引导，从治之法也，
外以柳花散搽之。实火者色艳红，满口烂斑，甚者腮舌
俱肿，脉实口干，此因过食膏梁厚味，醇酒炙膊，以致
心、脾实火妄动，宜服凉膈散，外搽赴筵散，吐唌则效
。如口疮舌干，黄硬作渴者，宜服加减八味丸，以滋化
源，俱禁水漱。
方剂：柳花散
组成：黄柏（末，一两） 青黛（三钱）
肉桂（一钱） 龙脑香（即冰片，各二钱）
各研细，再合一处研匀，每用少许，搽于患处。
【方歌】柳花散治白口疮，黄柏青黛龙脑香，肉桂共研搽患处，
虚火上炎自平康。
又方：赴筵散
组成：黄芩 黄连
栀子（生） 干姜
黄柏（末） 细辛
共研细末，每用少许，搽于患处。
【方歌】赴筵散医实火攻，口疮斑烂色多红，芩连栀子干姜柏，
细辛同研有神功。
又方：凉膈散（见面部面发毒）
加减八味汤（见溃疡门）
[Formula Song] Xuer Chuang (Otitis Externa / Auricular Eczema) arises in the crease behind the ear, spreading up and down causing ear pain; its appearance resembles a knife-cut fissure caused by Damp-Heat. Applying Chuanfen San (Cave Earth Powder) will bring success.
[Note] This condition arises between the creases behind the ear, extending to the folds of the auricle, presenting a shape like a knife-cut fissure. The color is red, often exuding yellow fluid, caused by Damp-Heat in the Gallbladder and Spleen meridians. However, this sore fluctuates with the moon's phases: it worsens when the moon is full and improves when the moon wanes, hence it is also called Yueshi Chuang (Moon-bitten Sore). It is suitable to apply Chuanfen San externally for effective treatment.
Formula: Chuanfen San (Cave Earth Powder)
Composition: Qingfen (Calomel, ground, lightly stir-fried through paper), Chanshanjia (Pangolin Scales, roasted), Qianfen (Lead Carbonate), Huangdan (Litharge, processed by water levigation), each 3 qian.
Grind all into an extremely fine powder, mix with Sesame Oil, and apply to the affected area.
[Formula Song] Chuanfen San applied for Xuer Chuang clears Heat and leaches out Dampness, mixed with oil is excellent; Qingfen is ground fine and stir-fried through paper, combined with Chanshanjia, Qianfen, and Huangdan.
[Formula Song] Kou Chuang (Oral Ulcers) in adults are differentiated into Deficiency and Excess patterns: bright red indicates Excess, pale red indicates Deficiency. In Excess patterns, there are widespread ulcerated spots and swelling; in Deficiency patterns, the lesions are white, non-swollen, with sparse, slight spots.
[Note] This condition is named Kou Chuang (Oral Ulcers), divided into Deficient Fire and Excess Fire. Deficient Fire presents as pale red color, with white spots scattered across the mouth; severe cases show depressed,龟-like cracks, a deficient pulse, and no thirst. This results from excessive mental exertion, frequent waking with little sleep, leading to a failure of communication between the Heart and Kidney, with Deficient Fire flaming upward. It is suitable to take Siwu Tang (Four Substances Decoction) added with Huangbai (Phellodendron Bark), Zhimu (Anemarrhena Rhizome), and Danpi (Moutan Cortex), with a small amount of Rougui (Cinnamon Bark) as a guiding agent, which is a method of treating according to the nature of the disease. Externally, Liuhua San (Willow Flower Powder) can be applied. Excess Fire presents as bright red color, with widespread ulcerated spots; severe cases involve swelling of the cheeks and tongue, a solid pulse, and dry mouth. This results from overconsumption of rich, greasy foods, strong wine, and roasted meats, causing Excess Fire in the Heart and Spleen to move recklessly. It is suitable to take Liangge San (Cool the Diaphragm Powder) and apply Fuyan San (Banquet Attending Powder) externally; relief comes after spitting saliva. If oral ulcers are accompanied by a dry tongue, yellow hard coating, and thirst, Jiajian Bawei Wan (Modified Eight-Ingredient Pill) should be taken to nourish the source of transformation; rinsing the mouth with water is prohibited in all cases.
Formula: Liuhua San (Willow Flower Powder)
Composition: Huangbai (Phellodendron Bark, powdered, 1 liang), Qingdai (Indigo Naturalis, 3 qian), Rougui (Cinnamon Bark, 1 qian), Longnaoxiang (Borneol, 2 qian).
Grind each finely, then mix together thoroughly. Use a small amount each time and apply to the affected area.
[Formula Song] Liuhua San treats white Kou Chuang, composed of Huangbai, Qingdai, and Longnaoxiang; Rougui is ground together and applied to the site, calming the flaming-up of Deficient Fire naturally.
Another Formula: Fuyan San (Banquet Attending Powder)
Composition: Huangqin (Scutellaria Root), Huanglian (Coptis Rhizome), Zhizi (Gardenia Fruit, raw), Ganjiang (Dried Ginger), Huangbai (Phellodendron Bark, powdered), Xixin (Asarum).
Grind all into a fine powder. Use a small amount each time and apply to the affected area.
[Formula Song] Fuyan San attacks Excess Fire in oral ulcers, where spots are often bright red; Huangqin, Huanglian, Zhizi, Ganjiang, Huangbai, and Xixin ground together work miraculously.
Another Formula: Liangge San (Cool the Diaphragm Powder) (see section on Facial Furuncles)
Jiaban Bawei Tang (Modified Eight-Ingredient Decoction) (see section on Ulcers)