或曰∶半身不遂，既然无风，如何口眼歪斜？余曰∶古人立歪斜之名，总是临症不细心
审查之故。口眼歪斜，并非歪斜，因受病之半脸无气，无气则半脸缩小，一眼无气力，不能圆睁
，小眼角下抽，口半边无气力不能开，嘴角上抽，上下相凑，乍看似歪斜，其实并非左右之
歪斜。尝治此症，凡病左半身不遂者，歪斜多半在右；病右半身不遂者，歪斜多半在左。此
理令人不解，又无书籍可考。何者？人左半身经络上头面从右行，右半身经络上头面从左行
，有左右交互之义。余亦不敢为定论，以待高明细心审查再补。
又曰∶口眼歪斜，尽属半脸无气乎？余曰∶前论指兼半身不遂而言。若壮盛人，无半身
不遂
亦能病口眼歪斜，用通经络散风之剂，一药而愈，又非治半身不遂方之所能为也。
或曰∶口角所流非痰饮乎？余曰∶尝治此症，见所流尽是清水，并非稠痰。明明气虚不
固津
以他症互相参看，流涎者属气虚无疑。
或曰∶患半身不遂，兼大便干燥，古人名曰风燥，言其病有风有火，有是理乎？余曰∶
若是风火，用散风清火润燥攻下药，大便一行，风散火清，自当不燥。尝见治此症者，误用下
药，下后干燥更甚。总不思平素出大恭时，并非大恭顺谷道自流，乃用气力催大恭下行。既得
半身不遂之后，无气力使手足动，无气力使舌言，如何有气力到下部催大恭下行。以此推之，
非风火也，乃无气力催大恭下行。大恭在大肠，日久不行，自干燥也。
有人问：半身不遂既然不是风邪所致，为什么会出现口眼歪斜？我说：古人设立“歪斜”这个名称，总是因为临证时不够细心审查的缘故。所谓的口眼歪斜，其实并不是真正的歪斜，而是因为患病那一侧的脸部没有气机，没有气机导致半张脸肌肉萎缩变小，一只眼睛没有力气，无法圆睁，眼角向下拉扯；嘴巴半边没有力气，无法张开，嘴角向上牵引，上下相互凑合，乍一看似乎歪斜，其实并不是左右方向的歪斜。我曾经治疗这类病症，凡是左侧半身不遂的患者，歪斜多半在右侧；右侧半身不遂的患者，歪斜多半在左侧。这个道理让人难以理解，又没有书籍可以考证。为什么呢？因为人体左侧半身的经络到头面部是从右边行走的，右侧半身的经络到头面部是从左边行走的，这体现了左右交互的道理。我也不敢以此作为定论，等待高明之士细心审查后再做补充。
又有人说：口眼歪斜，全都是由于半张脸没有气吗？我说：前面的论述是指兼有半身不遂的情况而言。如果是身体强壮的人，没有半身不遂的症状，也能患上口眼歪斜，使用疏通经络、疏散风邪的药剂，一服药就能痊愈，这又不是治疗半身不遂的方剂所能做到的了。
又有人说：口角流出的液体不是痰饮吗？我说：我曾经治疗这类病症，看到流出的全是清水，并不是粘稠的痰液。明明是因为气虚不能固摄津液，结合其他症状互相参照来看，流涎症属于气虚无疑。
又有人说：患半身不遂，兼有大便干燥，古人称之为风燥，说是病中有风有火，有这样的道理吗？我说：如果是风火之邪，使用疏散风邪、清泻火热、润燥通便的药物，大便一通，风散火清，自然就不会干燥了。我曾见到治疗这类病症的人，误用泻下药，泻下之后干燥反而更严重。他们总不思考平时排便时，并不是粪便顺着肛门自动流出，而是需要用力气推动粪便下行。既然得了半身不遂之后，没有力气使手足活动，没有力气使舌头说话，怎么会有力气到下部去推动粪便下行呢？由此推断，这不是风火之邪，而是没有力气推动粪便下行。粪便在大肠中，日子久了不排出，自然就会干燥。
It is asked: If hemiplegia (hemiplegia) is not caused by wind, why does facial deviation (facial paralysis/deviation) occur? I say: The ancients named it "deviation" because they were not careful enough in clinical examination. Facial deviation is not actually a true deviation; it occurs because the affected half of the face lacks Qi. Without Qi, the muscles on that side shrink and contract. One eye lacks strength to open fully, causing the outer corner to pull downward; one side of the mouth lacks strength to open, causing the corner to pull upward. These upper and lower contractions together create the appearance of deviation at first glance, but it is not a true left-right deviation. In my clinical experience, for patients with left-sided hemiplegia, the deviation is mostly on the right side; for those with right-sided hemiplegia, the deviation is mostly on the left side. This principle is puzzling and cannot be verified in existing books. Why? Because the meridians of the left half of the body ascend to the head and face traveling on the right side, while the meridians of the right half of the body ascend to the head and face traveling on the left side, reflecting the principle of cross-interaction. I dare not state this as a definitive conclusion, but await scholars to examine it carefully and supplement it later.
It is further asked: Is facial deviation entirely due to lack of Qi in half the face? I say: The previous discussion referred specifically to cases accompanied by hemiplegia. If a robust person suffers from facial deviation without hemiplegia, they can be cured with a single dose of herbs that unblock the meridians and disperse wind. This effect cannot be achieved by the formulas used for treating hemiplegia.
It is asked: Is the fluid flowing from the corner of the mouth phlegm-fluid retention (phlegm-rheum)? I say: In treating this condition, I observed that the fluid was clear water, not thick phlegm. Clearly, it is due to Qi deficiency failing to consolidate and hold fluids. By correlating with other symptoms, salivation (sialorrhea) undoubtedly belongs to Qi deficiency.
It is asked: When suffering from hemiplegia accompanied by dry stool, the ancients called it "wind-dryness," implying the disease involves both wind and fire. Is there any truth to this? I say: If it were wind and fire, using herbs to disperse wind, clear heat/fire, and moisten dryness would resolve the issue; once the stool passes, the wind disperses and fire clears, so dryness should not persist. I have seen practitioners mistakenly use purgative herbs (purgatives) for this condition, resulting in even worse dryness after purgation. They fail to consider that normally, defecation does not happen automatically through the anus; it requires physical effort to push the stool down. After developing hemiplegia, one lacks the strength to move the limbs and lacks the strength to speak; how could there be sufficient strength to push stool down from below? Therefore, this is not wind-fire, but rather a lack of strength to propel the stool. Since the stool remains in the large intestine for a long time without being expelled, it naturally becomes dry.