手阳明、足阳明之脉，并入于齿。拔齿而损脉者，则经血不止，脏虚而眩闷。
齿者，是睡眠而相磨切也。此由血气虚，风邪客于牙车筋脉之间，故因睡、眠气
息喘而邪动，引其筋脉，故上下齿相磨切有声，谓之 齿。
齿者，骨之所终，髓之所养。手阳明、足阳明之脉，皆入于齿。风邪冷气，客于经脉，
髓虚血弱，不能荣养于骨，枯燥无润，故令齿黄黑也。
手少阴，心之经也，心气通于舌。足太阴，脾之经也，脾气通于口。腑脏热盛，热乘心
脾，气冲于口与舌，故令口舌生疮也。
诊其脉，浮则为阳，阳数者，口生疮。其汤熨针石，别有正方。补养宣导，今附于后。
《养生方·导引法》云∶凡人常觉脊背崛强，不问时节，缩咽膊内，仰面努膊
井向上，头左右两向 之，左右三七，一住，待血气行动定，然始更用。初缓后急，不
得先急后缓。若无病患，常欲得旦起、午时、日没三辰，如用，辰别二七。除寒热病，脊腰
颈项痛，风痹。口内生疮，牙齿风，头眩，终尽除也。
脾与胃合，胃为足阳明，其经脉起于鼻，环于唇，其支脉入络于脾。脾胃有热，气发于
唇，则唇生疮。而重被风邪寒湿之气搏于疮，则微肿湿烂，或冷或热，乍瘥乍发，积月累年
，谓之紧唇，亦名沈唇。
The meridians of Hand-Yangming and Foot-Yangming both enter the teeth. If the meridian is damaged during tooth extraction, the blood in the meridian will not stop flowing, leading to deficiency of the Zang organs and symptoms of dizziness and faintness.
Bruxism (Xie Chi) refers to the phenomenon of teeth grinding against each other during sleep. This occurs due to deficiency of Blood and Qi, where Wind pathogen lodges between the muscles and tendons of the jaw. Consequently, during sleep and respiration, the pathogen moves, pulling on the tendons and meridians, causing the upper and lower teeth to grind against each other with sound; this is called Bruxism.
Teeth are the extremities of the bones and are nourished by Marrow. The meridians of Hand-Yangming and Foot-Yangming both enter the teeth. If Cold-Wind pathogen lodges in the meridians, resulting in deficiency of Marrow and weakness of Blood, the bones cannot be properly nourished. The teeth become dry and lack moisture, thus turning yellow or black.
The Meridian of Hand-Shaoyin is the Heart meridian, and Heart Qi connects to the tongue. The Meridian of Foot-Taiyin is the Spleen meridian, and Spleen Qi connects to the mouth. If there is excessive heat in the Fu and Zang organs, Heat invades the Heart and Spleen, and Qi rushes to the mouth and tongue, causing sores to arise in the mouth and tongue.
Upon pulse diagnosis, a floating pulse indicates Yang syndrome; if the pulse is rapid, it indicates sores in the mouth. For this condition, treatments such as hot compresses (Tang Wu) and acupuncture (Zhen Shi) have separate specific formulas. Methods for tonification, nourishment, and Daoyin (guiding and pulling exercises) are attached below.
The *Yangsheng Fang · Daoyin Fa* states: Whenever one feels stiffness and rigidity in the back, regardless of the season, one should retract the throat, pull the shoulder blades inward, look up while straining the shoulder blades upward, and twist the head left and right. Perform seven repetitions on each side, pause once, wait until the movement of Qi and Blood stabilizes, and then continue. Start slowly and increase intensity later; do not start fast and slow down. If there is no illness, it is best to practice at three times: morning upon rising, noon, and sunset. At each time, perform fourteen repetitions. This method can eliminate cold-heat disorders, pain in the spine, waist, neck, and nape, Wind-Bi syndrome, sores in the mouth, wind affecting the teeth, and dizziness, ultimately curing them completely.
The Spleen and Stomach are exteriorly-interiorly related. The Stomach belongs to the Foot-Yangming meridian. Its main vessel originates from beside the nose, circles the lips, and its branch enters and connects with the Spleen. If there is Heat in the Spleen and Stomach, Qi emanates from the lips, causing sores to arise on the lips. If these sores are further attacked by Wind pathogen and Cold-Dampness, they may swell slightly, become moist and ulcerated, alternate between cold and hot sensations, and fluctuate between remission and recurrence over months or years. This is called Jin Chun (Tight Lip), also known as Shen Chun.
The Spleen and Stomach are exteriorly-interiorly related. The Foot-Yangming meridian is the Stomach meridian. Its vessel originates from beside the nose, circles the lips, and its branch enters and connects with the Spleen. If there is Heat in the Spleen and Stomach, Qi emanates from the lips, causing sores to arise on the lips.