《正宗》曰∶龙泉疽生人中之中，虎须毒生地角之上。此二毒乃肾督二脉分合行
布，骤被外邪所搏而成。初起疙瘩，次生肿痛，渐发寒热，甚者恶心、干呕、吐，项俱肿。
又曰∶此证多生于元气壮实者，故多不必服药，自愈。
又曰∶初起宜线针挑破患顶，以蟾酥饼贴膏盖，使毒有门而泄。四边 肿，如
意金黄散敷之。
又曰∶此穴忌灸。
《鬼遗方》云∶鼻下一处，人中两处为发髭，此患多因摘髭，外风侵入而结。攻
作不常，寒热并作。此亦害人。
王肯堂曰∶髭毒痈生于地角，属足阳明风热所致。若撼之有根，肌肉不仁，或
麻或痒，寒热大作，烦闷呕逆者，髭疔也。（《准绳》）
\r虎须毒 龙泉疽\p04-a41a83.bmp\r
申斗垣曰∶髭毒乃风邪积热，脾经受证；须毒髯毒，皆属手阳明大肠经受证。（《启玄》）
《心法》曰∶龙泉疽，生水沟穴，（即人中）虎须毒，一名虎髭毒，亦名颏痈，肿痛
赤，速溃易治；又名承浆疽，坚硬肿痛，迟溃难治，皆由过食炙 ，以至胃肾二经积
热，上攻任脉而成。
申斗垣曰∶羊须疔，乃怒气交感，流注经络，心经受证。初起根深，形如粟米
小豆；三四日面目浮肿；五六日寒热交作；七八日体倦头痛。如添呕逆神昏气喘，十
无一活。生于下颏须中是也。初起同疔疮门施治（《启玄》）
《外科正宗》说：龙泉疽生于人中穴正中，虎须毒生于地角（下颌两侧）。这两种毒证是由于肾经和督脉气血分布交汇之处，突然遭受外邪侵袭搏结而形成的。初起时出现疙瘩，随后产生肿痛，逐渐引发寒热症状，严重的会出现恶心、干呕、呕吐，颈部也会肿胀。
又说：这种病症多发生在元气壮实的人身上，所以大多不需要服药，可以自愈。
又说：初起时宜用线针挑破患处的顶端，贴上蟾酥饼并用膏药覆盖，使毒邪有出口得以泄出。四周肿胀处，可敷如意金黄散。
又说：此穴位禁忌艾灸。
《鬼遗方》说：鼻下有一处，人中两处称为“发髭”，这种病患多因拔除胡须，导致外风侵入而凝结所致。发作不规律，寒热交替出现。这也危害人体健康。
王肯堂说：髭毒痈生于地角，属于足阳明胃经风热所致。如果触动时有根脚，肌肉感觉麻木或不知痛痒，或者感到麻木或瘙痒，寒热剧烈发作，心烦闷乱、呕吐逆气的是髭疔。（出自《医学准绳六要》）
申斗垣说：髭毒是风邪积热，在脾经出现的证候；须毒和髯毒，都属于手阳明大肠经出现的证候。（出自《启玄子外科心法》）
《医宗金鉴·外科心法要诀》说：龙泉疽生于水沟穴（即人中穴），虎须毒又名虎髭毒，也名颏痈，特点是肿痛色红，迅速溃破且容易治疗；又名承浆疽，特点是坚硬肿痛，溃破缓慢且难治，这都是由于过食煎炸炙烤食物，导致胃经和肾经积热，向上攻冲任脉而形成的。
申斗垣说：羊须疔，是由于怒气交感，流注于经络，在心经出现的证候。初起时根深蒂固，形状像粟米或小豆；三四天后面目浮肿；五六天寒热交替发作；七八天身体疲倦头痛。如果出现呕吐逆气、神志昏迷、气喘等症状，十个人中没有一个能活下来。这种疔疮生于下巴胡须中间。初起时的治疗方法同疔疮门所述（出自《启玄子外科心法》）
The *Zhengzong* (Orthodox Standard) states: Longquan abscess arises in the center of the Renzhong acupoint, while Huxu toxin arises at the Dijiao (lateral mandible). These two toxins result from the sudden invasion and binding of external pathogens to the area where the Kidney Meridian and Du Meridian distribute and intersect. Initially, a nodule appears, followed by swelling and pain, gradually developing into chills and fever. In severe cases, nausea, dry heaving, vomiting, and neck swelling occur.
It further states: This condition often occurs in individuals with robust Yuan Qi (Original Qi), so medication is often unnecessary as it may resolve spontaneously.
It also states: At the initial stage, it is advisable to pierce the apex of the lesion with a thread needle, apply a Chan Su (Toad Venom) cake covered by a plaster, to provide an outlet for the toxin to drain. For swelling around the periphery, Yijian Jinhuang San (Ruyi Golden Yellow Powder) should be applied topically.
It further states: Moxibustion is contraindicated at this acupoint.
The *Guiyi Fang* (Ghost's Lost Formula) states: The area below the nose (one spot) and the Renzhong (two spots) are referred to as "facial hair eruption." This ailment is often caused by plucking facial hair, allowing external wind pathogens to invade and coagulate. The attacks are irregular, with alternating chills and fever. This too is harmful to the human body.
Wang Kentang states: Zidu carbuncle arising at the Dijiao is caused by Wind-Heat affecting the Foot-Yangming Stomach Meridian. If palpation reveals a root, accompanied by insensibility or numbness/itching of the flesh, severe chills and fever, mental restlessness, and vomiting/reversal of qi, it is classified as Ziding (Facial Hair Ding). (*Yixue Zhunsheng*)
Shen Douyuan states: Zidu is caused by accumulated heat from wind pathogens manifesting in the Spleen Meridian; Xudu (beard toxin) and Randu (cheek beard toxin) both manifest in the Hand-Yangming Large Intestine Meridian. (*Qixuan*)
The *Xinfa* (Essential Methods) states: Longquan abscess arises at the Shuigou acupoint (i.e., Renzhong); Huxu toxin, also known as Hu Zi toxin or Keyong (chin carbuncle), presents with red, swollen, painful symptoms, ruptures quickly, and is easy to treat. It is also called Chengjiang abscess, which presents with hardness, swelling, and pain, ruptures slowly, and is difficult to treat. Both arise from excessive consumption of roasted/grilled foods, leading to accumulated heat in the Stomach and Kidney meridians that attacks upward along the Ren Meridian.
Shen Douyuan states: Yangxu Ding (Goat Beard Ding) results from conflicting anger flowing into the meridians, manifesting in the Heart Meridian. Initially, the root is deep, shaped like a millet seed or small bean; after three to four days, the face and eyes swell; after five to six days, alternating chills and fever occur; after seven to eight days, fatigue and headache appear. If vomiting, coma, and asthma develop, none of ten patients will survive. This arises in the beard of the lower chin. Treatment at the initial stage follows the protocols for Ding Sores (Ding Chuang) described in the Ding Sores chapter (*Qixuan*).