手少阴，为心之经，其气通于舌；足太阴，脾之经，其气通于口。太阴之脉起于足大指
，入连舌本。心脾虚，为风热所乘，邪随脉至舌，热气留心，血气壅涩，故舌肿。舌肿脉胀急，则舌肿强。
人之五脏六腑，禀四时五行之气，阴阳相扶，刚柔相生。若阴阳和平，血气调适，则言
语无滞，吐纳应机。若阴阳之气不和，腑脏之气不足，而生謇吃。此则禀性有阙，非针药所
疗治也。
若腑脏虚损，经络受邪，亦令语言謇吃。所以然者，心气通于舌，脾气通于口，脾脉连
舌本，邪乘其脏，而搏于气，发言气动，邪随气而干之，邪气与正气相交，搏于口舌之间，
脉则痞涩，气则壅滞，亦令言謇吃，此则可治。
《养生方》云∶愤满伤神，神通于舌，损心则謇吃。
舌，心之候也。脾之脉起于足大指，入连于舌本。心脾有热，热气随脉波于舌本，血脉
胀起，变生如舌之状，在于舌本之下，谓之重舌。
悬痈，为音声之关也。喉咙，气之所上下。五脏六腑有伏热，上冲于喉咽，热气乘于悬
痈，或长或肿。
手少阴心经，是心的经脉，其气机通达于舌；足太阴脾经，是脾的经脉，其气机通达于口。足太阴脾经的脉气起于足大趾，向内连接至舌根。若心、脾两脏虚弱，被风热之邪侵袭，邪气随经脉上行至舌，热气留滞于心，导致血气壅塞涩滞，因此出现舌体肿胀。舌体肿胀且脉络胀急，就会导致舌体肿胀僵硬。
人的五脏六腑，禀受四时五行之气，阴阳相互扶持，刚柔相互滋生。如果阴阳平和，血气调适，那么言语就不会阻滞，呼吸吐纳顺应时机。如果阴阳之气不调和，脏腑之气不足，就会产生语言謇涩（说话不流利）。这种情况属于先天禀赋有缺陷，不是针灸和药物所能治疗的。
如果是脏腑虚损，经络受到邪气侵袭，也会导致语言謇涩。之所以这样，是因为心气通达于舌，脾气通达于口，脾经脉络连接舌根，邪气乘虚侵入脏腑，搏结于气分，发声时气动，邪气随着气机干扰人体，邪气与正气相交争，搏结于口舌之间，导致脉道痞塞涩滞，气机壅滞，从而引起语言謇涩，这种情况是可以治疗的。
《养生方》说：愤懑郁结损伤神气，神气通达于舌，损伤心脏就会导致语言謇涩。
舌，是心脏的外候。脾经的脉气起于足大趾，向内连接于舌根。如果心、脾有热，热气随脉气波及舌根，血脉胀起，变化生成类似舌头的形状，位于舌根之下，这叫做重舌（双舌）。
悬痈（软腭后部的肉质突起），是声音发出的关隘。喉咙，是气机上下通行的通道。如果五脏六腑中有伏热，向上冲逆至喉咽，热气侵袭悬痈，会导致悬痈或变长或肿胀。
喉咙，是气机上下通行的地方，也是五脏六腑呼吸的道路。如果脏腑受到风邪侵袭，热气上冲咽喉，就会导致咽喉肿胀下垂，所以称为垂倒（喉痹或咽喉肿痛下垂）。
肾主管呵欠，当阴阳之气牵引时就会打呵欠。诸阳经的筋脉中，有循行经过下颌关节（颔车）的，打呵欠时会牵动这些筋脉，如果筋脉中挟带有风邪，邪气因呵欠的动作而发作，因其发病急骤，所以会导致打呵欠时下颌关节脱位。
The Hand-Shaoyin (Heart) Meridian is the meridian of the Heart, and its Qi connects to the tongue; the Foot-Taiyin (Spleen) Meridian is the meridian of the Spleen, and its Qi connects to the mouth. The meridian of Taiyin originates from the big toe of the foot and extends inward to connect with the root of the tongue. If the Heart and Spleen are deficient, they may be invaded by Wind-Heat pathogenic factors. The pathogen follows the meridian to reach the tongue, where Heat lingers in the Heart, causing Blood and Qi to become stagnant and obstructed, resulting in a swollen tongue. When the tongue swells and the vessels become tense and urgent, it leads to a swollen and stiff tongue.
The five Zang organs and six Fu organs of humans inherit the Qi of the four seasons and the Five Elements, with Yin and Yang supporting each other and Gang (firmness) and Rou (softness) generating each other. If Yin and Yang are harmonious and Blood and Qi are balanced, speech will not be impeded, and respiration will follow the rhythm. However, if the Qi of Yin and Yang is disharmonious, or the Qi of the Zang and Fu organs is insufficient, speech impediment (dysarthria) may arise. This type is due to congenital deficiency and cannot be treated with acupuncture or herbs.
If the Zang and Fu organs are damaged and deficient, and the meridians are invaded by pathogens, speech impediment may also occur. The reason is that Heart Qi connects to the tongue, Spleen Qi connects to the mouth, and the Spleen meridian connects to the root of the tongue. Pathogens invade the organs when they are weak and contend with Qi. When speaking, Qi moves, and pathogens follow Qi to interfere. Pathogenic Qi and Healthy Qi interact and contend between the mouth and tongue, causing the meridians to become blocked and sluggish, and Qi to become stagnant, leading to speech impediment. This condition is treatable.
The *Yangsheng Fang* states: "Resentment and fullness damage the Spirit (Shen). Shen connects to the tongue; damaging the Heart leads to speech impediment."
The tongue is an external indicator of the Heart. The Spleen meridian originates from the big toe and connects to the root of the tongue. If there is Heat in the Heart and Spleen, Heat Qi spreads along the meridian to the root of the tongue, causing blood vessels to swell. A structure resembling a tongue forms beneath the root of the tongue, which is called Chongshe (Double Tongue).
Xuanyong (Soft Palate) is the gate for voice production. The throat is the pathway for the ascent and descent of Qi. If latent Heat exists within the five Zang and six Fu organs and rushes upward to the pharynx, Heat Qi invades Xuanyong, causing it to elongate or swell.
The throat is the pathway for the ascent and descent of Qi and the route for respiration of the five Zang and six Fu organs. If Wind pathogens invade the organs and Heat Qi rushes upward to the throat, swelling and drooping occur, hence it is called Chuidao (Drooping Throat).
The Kidney governs yawning. Yawning occurs when Yin and Yang Qi pull and draw. Among the meridians and sinews of all Yang channels, some circulate around the mandibular joint (Hanchhe). Yawning moves these sinews and meridians. If Wind pathogens are trapped within the sinews, the pathogens are triggered by the act of yawning. Due to the sudden onset and urgency, this causes dislocation of the mandibular joint during yawning.