人有对口之后，忽生小疮，先痒后痛，随至溃烂，人以为至凶之痈也。然而痈生正对口者犹轻，生于偏对
口者乃重。盖颈项之上，乃肾督脉之部位也，其地属阴，所生痈疽，多属阴痈，而非阳疽也。以阳症必高寸许，
其色红肿发光，疼痛呼号。而阴症则不然，色必黑暗，痛亦不甚，身体沉重，困倦欲卧，呻吟无力，其疮口必
不突起，或现无数小疮口，人皆不知从何处觅头。然阴阳二毒，皆可内消，何必令其皮破肿溃而后治之哉。至
于内消之法，初起之时，不须分别阴阳，可俱用三星汤。惟既破溃肠，阴阳不分，而漫投药饵，则祸生顷刻矣。
若阳症溃烂，仍以三星汤治之；若阴症溃烂者，则须用神效汤（按∶本方《辨证奇闻》、《辨证录》俱改名为
七圣汤）。
三星汤∶
金银花（二两） 蒲公英（一两） 甘草（三钱）
水煎服，未破者，服之可消。已破者，三剂脓尽而肉生矣。
秘诀∶
三星汤可治阳痈，二两银花一两英，
甘草三钱服三剂，自然脓尽好肉生。
神效汤∶
当归（一两） 黄 （一两） 人参（一两） 金银花（二两） 白芍（一两） 肉桂（一钱） 荆芥（三钱）
水煎服，一剂而血止，二剂而肉生，三剂而口小，四剂而皮合，再服二剂而痊愈矣。此方治各处痈毒，
凡低陷不作脓而不能收口者，急服此药，无不神效，不止治对口之阴毒，善能收功也。诚以阳症可以凉泻，阴
症必须温补故耳。
秘诀∶
神效汤中归 参，一两白芍二两金，
桂一荆三水煎好，阴痈六剂可回春。
方用三花汤亦效∶
川芎（一两） 紫花地丁（一两） 当归（二两） 菊花（五钱） 天花粉（三钱）
水煎服，二剂愈。
秘诀∶
痈不作脓三花汤，芎紫一两二两当，
甘菊五钱三花粉，止服二剂妙无双。
对口有偏、正之不同∶发于正者是督脉所生，偏者乃太阳膀胱所司。督脉行于下，而贯脊行于上，毒瓦斯得
之，反能冲突高起，邪毒不致下流，乃为外发，故易治。由膀胱发者难治，以膀胱之脉起于巅顶，贯脊两旁，
顺下而行，与痈毒交会下流，故疮多平塌难起，不发红肿溃烂，易流注于两肩而作肿，十五日无脓者，必然
变阳归阴，故多难治也。
人患对口疮后，突然长出小疮，先感到瘙痒随后疼痛，进而溃烂，人们认为这是极其凶险的痈疽。然而，生于正对口的痈疽尚且较轻，生于偏对口的则病情更重。因为颈项之上，是肾经和督脉（奇经八脉之一，行于背部正中）所主的部位，该处属阴，所以生成的痈疽多属于阴痈，而非阳疽。阳症必定高出皮肤一寸左右，颜色红肿光亮，疼痛剧烈让人呼号。而阴症则不然，颜色必然黑暗，疼痛也不甚剧烈，身体沉重，困倦想躺卧，呻吟声无力，疮口一定不突起，或者出现无数个小疮口，人们都不知道从哪里寻找脓头。然而阴阳二毒，都可以采用内消法治疗，何必非要等到皮破肿溃之后才去治疗呢？至于内消的方法，在初起之时，不需要分别阴阳，都可以使用三星汤。只有当已经破溃流脓后，如果不分阴阳，盲目投药，那么灾祸就会顷刻发生。如果是阳症溃烂，仍然用三星汤治疗；如果是阴症溃烂，则必须使用神效汤（按：本方在《辨证奇闻》、《辨证录》中均改名为七圣汤）。
三星汤：
金银花（二两） 蒲公英（一两） 甘草（三钱）
水煎服，未破溃的，服用后可消散。已破溃的，服用三剂后脓液排尽新肉生长。
秘诀：
三星汤可治阳痈，二两银花一两英（公英），
甘草三钱服三剂，自然脓尽好肉生。
神效汤：
当归（一两） 黄芪（一两） 人参（一两） 金银花（二两） 白芍（一两） 肉桂（一钱） 荆芥（三钱）
水煎服，一剂血止，二剂肉生，三剂疮口变小，四剂皮肤愈合，再服两剂即可痊愈。此方治疗各处痈毒，凡是疮形低陷不能化脓且无法收口的，急服此药，无不神效，不仅是对口之阴毒有效，善于取得疗效。诚然，因为阳症可以用凉泻法，阴症必须用温补法的原因。
秘诀：
神效汤中有归参，一两白芍二两金（金银花），
桂一荆三水煎好，阴痈六剂可回春。
方用三花汤也有效：
川芎（一两） 紫花地丁（一两） 当归（二两） 菊花（五钱） 天花粉（三钱）
水煎服，二剂痊愈。
秘诀：
痈不作脓三花汤，芎紫一两二两当（当归），
甘菊五钱三花粉，止服二剂妙无双。
对口疮有偏、正的不同：发于正中的是督脉所生，偏侧的是太阳膀胱经所主。督脉行于下方，贯穿脊柱向上运行，毒瓦斯遇到它，反而能冲突高起，邪毒不至于向下流注，而是向外发散，所以容易治疗。由膀胱经发出的难治，因为膀胱经的脉气起于头顶，贯穿脊柱两旁，顺行而下，与痈毒交会并向下流注，所以疮面多平塌难以隆起，不发红肿溃烂，容易流注到双肩造成肿胀，如果十五天没有脓液形成，必然转变为阳证归于阴证（此处指病情复杂化或转归不良），所以大多难治。
After a person develops a carbuncle at the back of the neck (Duikou sore), small sores suddenly appear, initially causing itching followed by pain, and eventually leading to ulceration. People consider this an extremely dangerous abscess. However, an abscess occurring exactly on the midline is relatively mild, whereas one occurring off-center is more severe. This is because the area above the neck is governed by the Kidney Meridian and the Du Mai (Governing Vessel, one of the eight extraordinary vessels running along the midline of the back). This region belongs to Yin, so the abscesses formed there are mostly Yin abscesses rather than Yang ulcers. A Yang syndrome must protrude about one cun above the skin, with redness, swelling, brightness, and severe pain causing groaning. In contrast, a Yin syndrome is different: the color is necessarily dark, the pain is not severe, the body feels heavy, there is fatigue and a desire to lie down, moans are weak, the sore does not protrude, or it presents as numerous tiny openings where people do not know where to find the head of the pus. Nevertheless, both Yin and Yang poisons can be resolved internally; why wait until the skin breaks and swelling suppurates before treating? Regarding the method of internal resolution, at the initial stage, there is no need to distinguish between Yin and Yang; Sanxing Tang (Three Star Decoction) can be used for both. Only after rupture and suppuration, if one fails to distinguish Yin from Yang and administers medicine indiscriminately, disaster will occur instantly. If it is a Yang syndrome with ulceration, Sanxing Tang should still be used; if it is a Yin syndrome with ulceration, Shenxiao Tang (Miraculous Efficacy Decoction) [Note: This formula is renamed Qisheng Tang in *Bianzheng Qiwen* and *Bianzheng Lu*] must be used.
Sanxing Tang (Three Star Decoction):
Honeysuckle Flower (Jinyinhua, 2 liang)
Dandelion (Pugongying, 1 liang)
Licorice Root (Gancao, 3 qian)
Decoct in water and take orally. For those not yet ruptured, taking this can resolve the condition. For those already ruptured, after three doses, the pus will be exhausted and new flesh will grow.
Secret Formula:
Sanxing Tang treats Yang abscesses, two liang of Honeysuckle and one liang of Dandelion,
Take three qian of Licorice for three doses; naturally, pus exhausts and healthy flesh grows.
Shenxiao Tang (Miraculous Efficacy Decoction):
Angelica Sinensis Root (Danggui, 1 liang)
Astragalus Root (Huangqi, 1 liang)
Ginseng Root (Renshen, 1 liang)
Honeysuckle Flower (Jinyinhua, 2 liang)
White Peony Root (Baishao, 1 liang)
Cinnamon Twig (Rougui, 1 qian)
Schizonepeta Spike (Jingjie, 3 qian)
Decoct in water and take orally. After one dose, bleeding stops; after two doses, flesh grows; after three doses, the wound shrinks; after four doses, the skin closes. Taking two more doses leads to recovery. This formula treats carbuncles and toxins anywhere in the body. For any low-lying lesion that fails to suppurate and cannot close, urgent administration of this medicine yields miraculous results. It is not only effective for Yin poison of the Duikou sore but excels in achieving success. Indeed, this is because Yang syndromes can be treated with cooling purgatives, while Yin syndromes require warming tonification.
Secret Formula:
In Shenxiao Tang, there are Angelica and Ginseng, one liang of White Peony and two liang of Honeysuckle,
One qian of Cinnamon and three qian of Schizonepeta decocted well; six doses for Yin abscess bring back spring.
Using Sanhua Tang (Three Flowers Decoction) is also effective:
Sichuan Lovage Rhizome (Chuanxiong, 1 liang)
Viola Yedoensis (Zihuadiding, 1 liang)
Angelica Sinensis Root (Danggui, 2 liang)
Chrysanthemum Flower (Juhua, 5 qian)
Trichosanthes Root (Tianhuafen, 3 qian)
Decoct in water and take orally. Recovery occurs in two doses.
Secret Formula:
For carbuncles failing to suppurate, use Sanhua Tang: one liang each of Lovage and Viola, two liang of Angelica,
Five qian of Chrysanthemum and three qian of Trichosanthes; just two doses are wonderfully unique.
Duikou sores differ in being central or lateral: Those arising centrally are generated by the Du Mai (Governing Vessel); those lateral are governed by the Taiyang Bladder Meridian. The Du Mai runs downward and penetrates the spine upward. When toxic qi encounters it, it conflicts and rises high, preventing evil toxins from flowing downward, thus manifesting externally, making it easier to treat. Those originating from the Bladder Meridian are difficult to treat because the Bladder Meridian originates at the vertex, penetrates both sides of the spine, and flows downward. It intersects with the carbuncle toxin and flows downward, so the sores tend to be flat and difficult to rise, lacking redness, swelling, and ulceration. They easily flow into both shoulders causing swelling. If there is no pus formation after fifteen days, it inevitably transforms from Yang to Yin (indicating a complex or deteriorating prognosis), hence they are mostly difficult to treat.