张子和治泽州李结之，忽犯牙痛，皱眉不语。一客见之，曰∶何不乐也？曰∶牙
痛。客曰∶予曾闻戴人云！阳明经邪热有余也，宜大下之，乃付舟车丸七十粒。服毕，为
支留饮药为盐酒所发，吐之，吐毕而痛止。患者大服，曰∶戴人神仙也！不三日复痛，再
服前药百丸，下数行遂愈，不复作。
丹溪治一妇人，年三十余，病齿痛不可忍，口吸凉风则暂止，闭口则复痛，此阳明
湿热为患也。用黄连、胡桐泪苦寒、薄荷、荆芥辛凉，四味治湿热为主。升麻苦平，行阳
明经为使。牙齿骨之余，以羊 骨补之为佐。麝香少许为引用，共为细末。擦之，痛减半。
又以调胃承气硝加黄连治其本，下二三行而止，遂不复作。
《内经》曰∶一阴一阳结，谓之喉痹。（一阴是厥阴风木，一阳是少阳相火，风火结郁
咽喉，不散则成痹矣。）又曰∶咽喉者，水谷之道也。喉咙者，气之所以上下者也。会
厌者，音声之户也。足之少阴，上系于舌，络于横骨，终于会厌，两泻其血脉，浊气乃辟。
《原病式》曰∶喉痹，不仁也，俗作闭，犹闭塞也。火主肿胀，故热客上焦而咽嗌
肿胀也。
李东垣曰∶火与元气不两立，一胜则一负。盖元气一虚，则相火随起，而喉等异病作
矣。咽喉之与会厌，《内经》谓之吸门，咽以纳气，喉以纳食，会厌管乎其上，以司开阖。
掩其食下，不掩之则喉错，必舌抵上 ，则会厌能闭。其咽通主饮食，司呼吸升降，为人
身之橐 ，紧关之门户也。若夫卒然浆水不入，言语不通，死在须臾，诚可惊骇，俗谓
双乳蛾、单乳蛾，古方通谓之喉痹，皆相火冲逆耳。
张子和治疗泽州人李结，他突然患牙痛，眉头紧锁，沉默不语。一位客人看见他，问道：“为什么不快乐呢？”李结回答说：“牙痛。”客人说：“我曾听戴人（张子和）说过：这是阳明经邪热有余所致，应当用峻下法治疗，于是给他服用了七十粒舟车丸。服药完毕后，又服用支留饮药，因被盐酒诱发而呕吐，吐完后疼痛停止。患者非常高兴，说：“戴人是神仙啊！”不到三天，疼痛复发，再次服用前药一百粒，排便数次后痊愈，不再发作。
朱丹溪治疗一位三十多岁的妇人，患齿痛难以忍受，口吸凉风则暂时缓解，闭口则疼痛复发，这是阳明湿热为患。使用黄连、胡桐泪（苦寒）、薄荷、荆芥（辛凉），以这四味药为主治疗湿热。升麻（苦平），作为引经药引导药力进入阳明经。牙齿是骨的余气，用羊骨补益作为佐药。少许麝香作为引经药，共研为细末。外擦患处，疼痛减半。又用调胃承气汤加硝石和黄连治疗其根本原因，排便二三行后停止用药，遂不再发作。
《内经》说：一阴一阳结聚，称为喉痹。（一阴指厥阴风木，一阳指少阳相火，风火结郁于咽喉，不散则形成痹证。）又说：咽喉是水谷通行的道路。喉咙是气体上下出入的通道。会厌是声音发出的门户。足少阴肾经上行系于舌根，联络横骨，终止于会厌，针刺两侧血脉，浊气才能排除。
《原病式》说：喉痹，感觉麻木不仁，俗写作“闭”，意为闭塞。火性主肿胀，所以热邪客居上焦导致咽喉肿胀。
李东垣说：火与元气不能两立，一方胜则另一方负。元气一旦虚弱，相火就会随之而起，从而引发喉部等奇异病症。咽喉与会厌，《内经》称为吸门，咽用来纳气，喉用来纳食，会厌位于上方主管开阖。吞咽时掩住食物下行，若不掩住则喉错乱，必须舌尖抵住上颚，会厌才能闭合。咽通饮食，主管呼吸升降，是人体的橐龠（风箱），紧密关隘的门户。如果突然水浆不入，言语不通，死亡就在顷刻之间，确实令人惊骇，俗称双乳蛾、单乳蛾，古方通称为喉痹，都是相火冲逆所致。
Zi Hehe treated Li Jie from Zezhou, who suddenly suffered from toothache, with a furrowed brow and silence. A guest saw him and asked, "Why are you not happy?" Li replied, "Toothache." The guest said, "I once heard Dai Ren (Zi Hehe) say: this is due to excess pathogenic heat in the Yangming channel; it should be treated with severe purgation." Thus, he prescribed seventy pills of Zhouche Wan (Boat and Cart Pill). After finishing the medication, he took medicine for residual fluid retention, which was triggered by salt wine, causing vomiting. After vomiting ceased, the pain stopped. The patient was greatly pleased, saying, "Dai Ren is an immortal!" Three days later, the pain recurred. He took another hundred pills of the previous medicine, defecated several times, and was cured without recurrence.
Zhu Danxi treated a woman in her thirties suffering from unbearable toothache. The pain temporarily subsided when she sucked cool air through her mouth but returned when her mouth was closed. This was caused by damp-heat in the Yangming channel. He used Huanglian (Coptidis Rhizoma), Hutonglei (Tamarici Flos - bitter and cold), Bohe (Menthae Haplocalycis Herba), and Jingjie (Schizonepetae Spica) - pungent and cool - as the main treatment for damp-heat. Shengma ( Cimicifugae Rhizoma ), bitter and neutral, served as the guiding herb for the Yangming channel. Since teeth are the surplus of bones, sheep bone was used as an adjuvant to tonify. A small amount of Shexiang (Moschus) was used as a guide. All were ground into fine powder and applied externally to the affected area, reducing the pain by half. Subsequently, Tiaowei Chengqi Tang (Regulate the Stomach and Order the Decoction) plus Nuxiao (Natrii Sulfas) and Huanglian was used to treat the root cause. After two or three bowel movements, the medication was stopped, and the condition did not recur.
The *Neijing* states: When one Yin and one Yang knot together, it is called Hou Bi (throat obstruction). (One Yin refers to Jueyin Wind-Wood, and one Yang refers to Shaoyang Ministerial Fire; wind and fire knot and stagnate in the throat, forming obstruction if not dispersed.) It also states: The throat and pharynx are the pathways for water and food. The larynx is the passage for Qi to ascend and descend. The epiglottis is the gate of voice. The Foot-Shaoyin Kidney channel ascends to tie with the tongue, connects to the transverse bone, and terminates at the epiglottis. Needling the blood vessels on both sides allows turbid Qi to be expelled.
The *Yuan Bing Shi* states: Hou Bi involves numbness and insensibility; colloquially written as "Bi" (closure), meaning blockage. Fire governs swelling; thus, when heat pathogens lodge in the Upper Jiao, the throat and pharynx swell.
Li Dongyuan stated: Fire and Yuan Qi (Original Qi) cannot coexist; when one prevails, the other declines. Once Yuan Qi is deficient, Ministerial Fire arises accordingly, leading to various diseases of the throat. The throat, pharynx, and epiglottis are referred to as Xi Men (Inhalation Gate) in the *Neijing*. The pharynx receives Qi, the larynx receives food, and the epiglottis, located superiorly, controls opening and closing. During swallowing, it covers the food descending; if not covered, the larynx becomes disordered. One must press the tongue against the upper palate for the epiglottis to close properly. The pharynx conducts food and drink and governs respiratory ascent and descent; it is like a bellows (Tuo Yue) in the human body, a tightly closed gateway. If suddenly one cannot swallow fluids or speak, death may occur in an instant. This is truly alarming. Colloquially known as Double Ru E (tonsillar tonsillitis) or Single Ru E, ancient formulas generally refer to it as Hou Bi, all caused by the counterflow of Ministerial Fire.