冯鲁瞻曰∶唇口紧小不能开，饮食不得入者，名曰唇紧。（《锦囊》）
《折衷》云∶脾胃受邪，则唇为之病，得寒则紧也。
窦汉卿曰∶口紧，一名月阙疮、雁来风、虫蚀疮。此证急用马齿苋捣汁洗紧唇；
仍用黄荠汁灌去风痰，冰片散吹之。如毒瓦斯归心，胸前胀满，上气频促，下部洞泄
不止，必死难治。
胡景周曰∶唇紧湿烂，乍好乍发，经年累月，又名唇沈。（音渗，汁也。）乃脾家湿热也。
口唇燥裂 橄榄泡汤服，核中仁研烂敷患处。
又方 胭脂敷。
唇紧湿烂，经年累月，乍好乍发，葵根烧灰，猪脂和涂。
唇紧口小不能开 鳖甲、鳖头烧为末，敷之。
又方 马齿苋煎汁洗之。干者亦可。
唇紧难开灸法 承浆穴（在颐前唇下陷中，足阳明之会，一名天池。灸三壮。）合谷穴（在大指
歧骨间，一名虎口。男左女右，灸三壮。）
冬月唇干血出 桃仁研烂，猪油调涂。
窦汉卿曰∶脾胃受风，则唇 动裙揭矣。
冯鲁瞻曰∶如唇口蠕动者，脾虚不能收摄也。误治为痰，则津液愈枯，筋脉失
养，抽掣诸证作矣。（《锦囊》）
陈实功曰∶阳明胃火上攻，其患下唇发痒作肿，破裂流水，不疼难愈。宜铜粉
丸泡洗，内服地黄丸。自愈。（《正宗》）
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胡景周曰∶凡下唇肿痛，或生疮，名驴嘴风。上唇肿痛生疮，名鱼口风。以井
华水常润之，乃可搽药，以芒硝涂之。
Feng Luzhan stated: When the lips and mouth are tight and small, unable to open, preventing food and drink from entering, it is named Lip Tightness (Chun Jin). (From *Jin Nang*)
*Zhe Zhong* records: When the Spleen and Stomach are invaded by pathogenic factors, diseases of the lips occur; cold causes them to become tight.
Dou Hanqing stated: Mouth Tightness (Kou Jin), also known as Moon-Defect Sore (Yue Que Chuang), Wild Goose Wind (Yan Lai Feng), or Worm-Eroding Sore (Chong Shi Chuang). For this condition, urgently wash the tight lips with juice extracted from crushed Portulaca Oleracea Herba (Machixian, 马齿苋); still use juice from Brassica Juncea var. Rapa (Huangqi, 黄荠) to administer internally to dispel wind and resolve phlegm, and insufflate Bingpian San (Borneol Powder). If toxic vapors return to the Heart, causing chest fullness, frequent shortness of breath, and incessant diarrhea below, death is inevitable and difficult to treat.
Hu Jingzhou stated: Lips that are tight, wet, and ulcerated, appearing and disappearing over years, is also named Lip Shen (Chun Shen) (pronounced "shen", meaning fluid). This is caused by damp-heat in the Spleen.
Dry and cracked lips: Drink olive-infused water; crush the kernels inside the pits and apply to the affected area.
Another method: Apply Zhiyan (Carmine/Rouge).
Lips tight, wet, and ulcerated, persisting for years with intermittent remission: Burn Malva Verticillata Radix (Kuigen, 葵根) to ash, mix with Porcine Fat (Zhuzhi), and apply.
Lips tight, mouth small and unable to open: Burn Testudinis Carapax et Plastrum (Biejia, 鳖甲) and Testudinis Caput (Bietou, 鳖头) into powder, and apply.
Another method: Wash with decoction of Portulaca Oleracea Herba (Machixian, 马齿苋); dried herb may also be used.
Moxibustion for lips tight and hard to open: Chengjiang CV24 (Located in the depression anterior to the chin, below the lip, intersection of Foot-Taiyang-Stomach Meridian, also named Tianchi. Moxa 3 zhuang.) Hegu LI4 (Located between the bones of the thumb and index finger, also named Hukou. For males left, females right, moxa 3 zhuang each.)
Dry lips bleeding in winter: Crush Peach Kernel (Taoren, 桃仁), mix with Lard (Zhuyou, 猪油), and apply.
Dou Hanqing stated: When the Spleen and Stomach are invaded by wind, the lips tremble, like a skirt being lifted.
Feng Luzhan stated: If the lips and mouth twitch, it is due to Spleen deficiency failing to control and retain fluids. Misdiagnosing this as phlegm will cause further depletion of body fluids, loss of nourishment to sinews and vessels, and onset of various twitching and pulling symptoms. (From *Jin Nang*)
Twitching of lips and mouth: Coix Seed (Yiyiren, 薏苡仁), Adzuki Bean (Chixiaodou, 赤小豆), Stephania Tetrandra Root (Fangji, 防己), Licorice Root (Gancao, 甘草), decoct in water and take.
Chen Shigong stated: Yangming Stomach Fire attacking upward causes the lower lip to itch, swell, rupture, and weep fluid; it is not painful but difficult to heal. It is suitable to wash with Tongfen Wan (Copper Powder Pill) soak, and internally administer Dihuang Wan (Rehmannia Pill), which will heal spontaneously. (From *Waike Zhengzong*)
Wind on Lips (Chun Feng)
Hu Jingzhou stated: Whenever the lower lip is swollen and painful, or sores develop, it is named Donkey-Mouth Wind (Lvzui Feng). When the upper lip is swollen, painful, and develops sores, it is named Fish-Mouth Wind (Yukou Feng). Frequently moisten with well-water (Jinghua Shui), then apply medicine, coating with Mirabilite (Mangxiao, 芒硝).