经曰∶中央黄色，入通于脾，开窍于口。又曰∶脾气通于口，脾和，口能知五味矣。
陈飞霞曰∶口者，脾之外候。鹅口者，口内白腻满舌，如鹅之口，此肺热而心脾为甚，故发于口也。内服沆
瀣丹，外以保命散吹之。
口疮者，满口赤烂。此因胎禀本浓，养育过温，心脾积热，熏蒸于上，以成口疮。内服沆瀣丹，外以地鸡擂
水搽疮上，（地鸡即桶虫，人家砖下有之。）
口糜者，满口生疮溃烂。乃膀胱移热于小肠，膈肠不便，上为口糜。以导赤散去小肠之热，五苓散去膀胱之
热，当以二方合服。
口疮服凉药不效，乃肝脾之气不足，虚火泛上而无制。宜理中汤以收其浮游之火，外以上桂末吹之。若吐泻
后，口中生疮，亦是虚火，理中汤。昧者以为口疮悉为实热，概用寒凉，必不救。上 有胀起如悬痈者，此名重
。由脾胃挟热，气血不能收敛而成，用针刺去恶血，内服沆瀣丹，以碧云散吹之。
小儿两颐流液，浸渍胸前
者，此名滞颐。盖涎者脾之液，
口为脾窍。脾胃虚寒，不能收敛津液，故涎从口出，而滞于颐，宜温脾丹。
小儿口频撮者，气不和也。盖唇应于脾，气出于肺，脾虚不能生肺，以故口频撮。异功散，补脾散，补
脾生肺愈矣。小儿口撮面青多哭，此阴寒之至，肝脾虚冷，脐下痛也，理中汤温之。
小儿急欲吮乳，而口不能吮者，心脾有热，舌不转运、泻黄汤清之。
《集成》沆瀣丹（见前伤湿方内）
《集成》保命散 治小儿鹅口口疮。
箭头沙 枯白矾 明牙硝（各一钱）
共为细末吹之。
五苓散 （见前咳嗽方内）
导赤散 （见前夜啼方内）
理中汤 （见前泄泻方内）
碧云散 治小儿悬痈重 用。
蒲黄末 洋青黛 白硼砂 明牙硝 生甘草（各等分） 共为细末吹之。
温脾丹 治小儿脾冷流涎，浸溃颐间用。
木香 半夏（各三钱） 炮姜 白术（各二钱） 陈皮 青皮（各一钱）
上共为细末，炼蜜为丸，龙眼核大，每服一丸末饮下。
导功散 （见前胀满方内）
泻黄散 治小儿心脾有热，舌不转运，不能吮乳。
茯苓 黄芩 黄柏 黄连 栀仁 茵陈蒿 泽泻（各一钱） 灯心（十茎） 水煎服下。涂蔚生曰∶陈飞
霞五苓散去膀胱之热，语未免有误。盖五苓散最热，为温化寒水凝结之药，而其热所以
能去者，因水滞中焦，而膀胱失其火化，不能化气上行，则津液四达。故口渴而身热胸烦也。今苓泽利水下降，
桂枝化水上行则卫气得升，津液得达，故真寒可除，而假热可去也。若以是为治膀胱火热之药，是何异以硝黄为
治阳明寒结者乎？然则膀胱之热，果何以去，曰∶五苓散去桂枝加以知柏芩连木通等味，斯可耳。
The *Yellow Emperor's Inner Canon* states: The center corresponds to the color yellow, its qi connects with the Spleen, and it opens into the mouth. It also states: The Spleen's qi communicates with the mouth; when the Spleen is harmonious, the mouth can perceive the five flavors.
Chen Feixia said: The mouth is the external manifestation of the Spleen. "Goose-mouth" (Equeous Mouth) refers to white, greasy coating filling the oral cavity and covering the tongue, resembling a goose's beak. This is caused by Lung heat exacerbated by Heart and Spleen heat, hence manifesting in the mouth. Internally administer Hangxie Dan, and externally apply Baoming San as a powder insufflation.
Mouth sores refer to redness and ulceration throughout the mouth. This occurs due to strong prenatal endowment and excessive warmth during upbringing, leading to accumulated heat in the Heart and Spleen. This heat steams upward, resulting in mouth sores. Internally administer Hangxie Dan, and externally apply water made from grinding Di Ji (ground beetles, commonly found under bricks at home) onto the sores.
Oral thrush (Kou Mi) refers to ulcers and erosion throughout the mouth. This results from Heat transferring from the Bladder to the Small Intestine, causing obstruction in the diaphragm and intestines, with Heat rising to form oral thrush. Use Daochi San to clear Heat from the Small Intestine, and Wuling San to clear Heat from the Bladder; these two formulas should be taken together.
If mouth sores do not respond to cooling medicines, it is due to deficiency of Qi in the Liver and Spleen, allowing deficient Fire to float upward without restraint. Use Lizhong Tang to gather the floating Fire, and externally insufflate Shanggui (Cinnamon Twig) powder. If sores appear in the mouth after vomiting or diarrhea, this is also due to deficient Fire; use Lizhong Tang. Ignorant practitioners assume all mouth sores are excess Heat and indiscriminately use cold-natured herbs, which will certainly fail to save the patient. If there is swelling above resembling a hanging abscess, this is called "Double Tongue" (Chong She). This is formed by Spleen and Stomach carrying Heat, preventing Qi and Blood from converging. Puncture with a needle to release evil blood, internally administer Hangxie Dan, and externally apply Biyun San as insufflation.
When infants drool from both cheeks, soaking the chest, this is called "Stagnant Saliva" (Zhi Yi). Saliva is the fluid of the Spleen, and the mouth is the orifice of the Spleen. Due to deficiency-cold of the Spleen and Stomach, fluids cannot be contained, so saliva flows from the mouth and stagnates in the cheeks. Use Wenpi Dan.
Frequent puckering of the lips in infants indicates disharmony of Qi. The lips correspond to the Spleen, and Qi originates from the Lung. Spleen deficiency fails to generate Lung Qi, causing frequent lip puckering. Use Yigong San or Bupi San; tonifying the Spleen to generate Lung Qi will cure it. If an infant pucks their mouth, has a blue-green face, cries frequently, this indicates extreme Yin Cold, deficiency-cold of the Liver and Spleen, and pain below the umbilicus. Warm with Lizhong Tang.
If an infant urgently desires to suckle milk but cannot, it is due to Heat in the Heart and Spleen, causing the tongue to be immobile. Clear with Xiehuang Tang.
*Jicheng* Hangxie Dan (see formula for Injury by Dampness previously mentioned)
*Jicheng* Baoming San treats infant goose-mouth and mouth sores.
Shentousha (Arrowhead Sand), Kubaifan (Dried White Alum), Mingyanxiao (Refined Niter) (each 1 qian)
Grind into fine powder and insufflate.
Wuling San (see formula for Cough previously mentioned)
Daochi San (see formula for Night Crying previously mentioned)
Lizhong Tang (see formula for Diarrhea previously mentioned)
Biyun San treats infant hanging abscess and double tongue.
Puhuang Mo (Powdered Spore of Lygodium), Yangqingdai (French Indigo), Baipengsha (White Borax), Mingyanxiao (Refined Niter), Shenggancao (Raw Licorice Root) (equal parts)
Grind into fine powder and insufflate.
Wenpi Dan treats infant spleen-cold with drooling soaking the cheeks.
Muxiang (Aucklandia Root), Banxia (Pinellia Tuber) (each 3 qian), Paojiang (Prepared Ginger), Baizhu (Atractylodes Rhizome) (each 2 qian), Chenpi (Tangerine Peel), Qingpi (Green Tangerine Peel) (each 1 qian)
Grind all into fine powder, mix with refined honey to make pills the size of a longan seed. Take one pill per dose, washed down with rice water.
Yigong San (see formula for Distension previously mentioned, text erroneously reads "Daogong San")
Xiehuang San treats infant Heart-Spleen Heat, immobility of the tongue, and inability to suckle.
Fuling (Poria), Huangqin (Scutellaria Root), Huangbai (Phellodendron Bark), Huanglian (Coptis Rhizome), Zhiren (Gardenia Seed), Yinchenhao (Artemisia Capillaris), Zexie (Alisma Rhizome) (each 1 qian), Dengxincao (Juncus Effusus) (10 stems)
Decoct in water and take orally.
Tu Weisheng commented: Chen Feixia's statement that Wuling San removes Bladder Heat is somewhat erroneous. Wuling San is inherently warm/hot in nature, serving as a medicine to warm-transform congealed cold-water. Its ability to remove cold is because water stagnates in the Middle Jiao, causing the Bladder to lose its Fire-Qi transformation function, failing to transform Qi and ascend. Consequently, body fluids disperse widely, leading to thirst, fever, chest irritability, etc. Now, Fuling and Zexie promote urination downward, while Guizhi transforms water upward, allowing Wei Qi to ascend and body fluids to reach. Thus, true cold is removed, and false heat dissipates. To treat Bladder Fire-Heat with this formula would be akin to using Xiaoshi (Mirabilite) and Dahuang (Rhubarb) to treat Yangming Cold-Constipation. So, how should Bladder Heat truly be removed? The answer is: Remove Guizhi from Wuling San and add Zhimu (Anemarrhena Rhizome), Huangbai (Phellodendron Bark), Huangqin (Scutellaria Root), Huanglian (Coptis Rhizome), Mutong (Akebia Stem), etc., and only then is it suitable.