即人中白。便溺澄结所成。又藉尘埃没溺所集也。物入阴中。色剥为白。阴中之阴矣。
入手太阴肺足太阴脾。因精与气原从脾肺气化之中游溢转输。是以仍归脾肺也。
气味咸平而凉。 治鼻衄。传尸热劳。肺痿。心膈热。羸瘦渴疾。及肤出汗血。并口齿
生疮。走马牙疳。 能泻肝火三焦火并膀胱火从小便中出。（行其故道） 同鳗鱼食之。为
乌龙丹。大衄久衄及诸窍出血。并用人中白一团如鸡子大。绵五两烧研。每服二钱。温水服。
鼻衄五七日不住。及肤出汗血者。并用人中白新瓦 干。入麝香少许。温酒调服。立效。 痘
疮倒陷。腊月收人中白。火 为末。温水服三钱。陷者自出。走马牙疳。取下溺盆内白
屑。入瓷瓶。盐泥固济。 红研末。入麝香少许。贴之。又用妇人尿桶中白垢。火 一钱。
铜绿三分。麝香一分。和匀贴之。尤神。鼻中息肉。人中白瓦焙。每温汤服一钱。 口舌
生疮。溺桶 七分。枯矾三分。研匀。有涎拭去。数次即愈。
〔论〕 人溺主治之义。已悉于前矣。溺之与白 。原是一物。但溺则径达下而不留。
白性稍留。于肺所生病。可徐而致其功。故用之微有异。经曰。饮入于胃。游溢精气。上
输于脾。脾气散精。上归于肺。通调水道。下输膀胱。是饮之精气。由胃而脾。由脾而肺。
以达其清阳于上。即少阳属肾。肾上连肺之义。阴中之阳致于上。则阳中之阴达于下。故能
化血归经。经所谓肺之浊气。下注于经也。血化归经。是谓营气。是乃谓之通调水道也。后
天之水。皆根气化。气固肺所主。而气化之能通调水道者。以其清阳之能化。而浊阴之化乃
行。则凡浊阴不化。如血证当首及。而更于治肺为切当也。所治上焦诸证。皆就清阳之能化
以化浊阴耳。即痘疮倒陷。非又清阳之不化以致病于浊阴者乎。若止以咸能入血而散为言。
则亦不究其本矣。
〔修治〕 岁久溺器有浓寸余者。取置瓷盘内。露高洁处。越一二载。中外皆白。绝无
臭气。乃可用。研极细。水飞数过。再研万匝。如仍有恶臭。随泡随飞。约数百遍。以无臭
为度。 淬者精粹尽失。转增火毒。不堪用。
这就是人中白。它是大小便沉淀凝结而成的，又是借助尘埃积聚在溺器中形成的。物质进入阴处，颜色剥落变为白色，属于阴中之阴。
它归入手太阴肺经和足太阴脾经。因为精微与气原本是从脾肺的气化过程中游溢转输的，所以仍然回归到脾肺。
气味咸、平、凉。治疗鼻出血、传尸热劳（一种慢性消耗性传染病）、肺痿、心膈热、身体消瘦口渴的疾病，以及皮肤出汗带血，还有口腔牙齿生疮、走马牙疳（一种严重的口腔溃烂病）。它能泻除肝火、三焦火和膀胱火，使它们从小便排出。（这是让它们沿着原来的路径排出）
与人鳗鱼一起食用，制成乌龙丹，用于治疗大出血、长期鼻出血以及各种孔窍出血。另外用人中白一团如鸡蛋大小，绵五两烧成灰研末，每次服用二钱，用温水送服。
如果是鼻出血持续五七日不止，或者皮肤出汗带血的，都取新瓦上干燥的人中白，加入少许麝香，用温酒调服，立即见效。
对于痘疮倒陷（痘疹内陷），在腊月收集人中白，用火煅烧成粉末，用温水送服三钱，内陷的痘疹自然会发出。
治疗走马牙疳，取下溺盆内的白色碎屑，放入瓷瓶中，用盐泥密封固济，煅红后研成粉末，加入少许麝香，贴敷患处。又取妇人尿桶中的白色垢腻，煅烧一钱，铜绿三分，麝香一分，混合均匀后贴敷，尤为神奇。
治疗口舌生疮，取溺桶中的白色垢腻七分，枯矾三分，研匀。有涎液时先拭去，数次即可痊愈。
〔论〕 人尿主治的意义，在前面已经详尽说明了。尿与人中白，原本是一物。但尿则直接通达下部而不滞留，人中白的性质稍能滞留，对于肺所生的疾病，可以慢慢地发挥其功效，所以使用时略有不同。
经典说：“饮入于胃，游溢精气，上输于脾。脾气散精，上归于肺。通调水道，下输膀胱。”这是说饮食的精气，由胃传到脾，由脾传到肺，以将其清阳之气输送到上部。也就是少阳属肾，肾向上连接肺的含义。阴中之阳上升到上部，则阳中之阴下降到下部。所以能够化血归经，经书所说的“肺之浊气，下注于经”。血化归经，这就叫做营气，这也就是所谓的通调水道。
后天之水，都根源于气化。气固然是由肺所主，而气化能够通调水道的功能，是因为清阳能够化生，而浊阴的转化才能运行。那么凡是浊阴不能转化的情况，如血证应当首先涉及，而对于治肺更为切当。所治疗的上焦各种病症，都是利用清阳能够化生来化解浊阴罢了。即使是痘疮倒陷，难道不是清阳不能化生导致病在于浊阴吗？如果仅仅说咸味能入血而散，那就没有探究其根本了。
〔修治〕 年代久远的溺器中有厚达一寸多的垢腻，取出来放在瓷盘内，置于高洁之处暴露，过了一两年，内外都变白，完全没有臭气，然后可以使用。研磨得极细，用水飞法处理多次，再研磨万次。如果仍有恶臭，随泡随飞，大约几百遍，以没有臭味为标准。淬炼者精粹尽失，反而增加火毒，不堪使用。
This is Renzhongbai (Human Urine Deposit). It is formed by the precipitation and condensation of urine and feces, and also accumulates in urinals aided by dust. Substances entering yin locations shed their color to become white, representing yin within yin.
It enters the Hand-Taiyin Lung Meridian and Foot-Taiyin Spleen Meridian. This is because essence and qi originally circulate and transmit through the qi transformation of the Spleen and Lung; thus, they return to the Spleen and Lung.
Its flavor is salty, nature is neutral and cool. It treats epistaxis (nosebleed), Chuan Shi Re Lao (a chronic consumptive infectious disease), Fei Wei (Lung Atrophy), heat in the heart and diaphragm, emaciation with thirst, bleeding from sweat on the skin, sores in the mouth and teeth, Zou Ma Ya Gan (gangrenous stomatitis), and can drain Liver Fire, Sanjiao Fire, and Bladder Fire, expelling them via urination (following their original pathways).
Consumed together with Mian Yu (Murren Fish) to make Wulong Dan (Black Dragon Pill), it is used for severe hemorrhage, persistent epistaxis, and bleeding from various orifices. Alternatively, use a piece of Renzhongbai the size of a chicken egg, burn five liang of cotton silk to ash and powder, take two qian per dose, administered with warm water.
For epistaxis persisting for five to seven days without stopping, or for bleeding from sweat on the skin, use dried Renzhongbai from a new tile, add a small amount of Shexiang (Musk), mix with warm wine, and administer for immediate effect.
For Da Chuang Dao Xian (inverted pustules in smallpox/variolae), collect Renzhongbai in the twelfth lunar month, calcine into powder, and take three qian with warm water; inverted lesions will naturally emerge.
To treat Zou Ma Ya Gan, scrape the white scum from inside a urinal, place it in a porcelain bottle, seal tightly with salt mud, calcine until red, powder it, add a small amount of Shexiang (Musk), and apply topically. Another method uses the white scum from a woman's urinal, calcine one qian, mix with three fen of Tonglv (Malachite) and one fen of Shexiang (Musk), blend evenly, and apply topically; this is particularly miraculous.
For nasal polyps, roast Renzhongbai on a tile, take one qian per dose with warm water. For sores in the mouth and tongue, take seven fen of scum from a urinal, mix with three fen of Kufan (Burnt Alum), powder uniformly. Wipe away saliva before application; it heals after several applications.
[Discussion] The therapeutic principles of human urine have been fully explained previously. Urine and Renzhongbai are essentially the same substance. However, urine flows directly downward without retention, whereas Renzhongbai has a slightly retentive nature. For diseases originating in the Lung, its effects can be exerted gradually; hence, its usage differs slightly. The Classics state: "When fluids enter the Stomach, their essence floats and overflows, moving upward to the Spleen. The Spleen disperses essence, sending it upward to return to the Lung. [The Lung] regulates water passages, transmitting downward to the Bladder." This describes how the essence of food and drink travels from Stomach to Spleen, then to Lung, delivering clear yang to the upper body. This aligns with the concept that Shaoyang belongs to the Kidney, which connects upward to the Lung. Yin-yang within yin rises to the upper, while yang-yin within yang descends to the lower. Thus, blood can be transformed and returned to the vessels. As the Classics say, "The turbid qi of the Lung descends into the vessels." Blood transforming and returning to vessels is called Ying Qi (Nutritive Qi); this is what is meant by regulating water passages. Postnatal water all roots in qi transformation. Qi is primarily governed by the Lung, yet the ability of qi transformation to regulate water passages lies in the capacity of clear yang to transform, allowing turbid yin to move. Therefore, conditions where turbid yin fails to transform, such as blood disorders, should first address the Lung, making treatment of the Lung most appropriate. All upper jiao conditions treated here utilize the transformative power of clear yang to resolve turbid yin. Even inverted pustules result from the failure of clear yang to transform, leading to pathology in turbid yin. To merely claim that salty flavors enter blood and disperse is to fail to investigate the root cause.
[Processing] Scum from old urinals, thickening to over one cun, should be taken and placed in a porcelain dish, exposed in a clean, high location. After one or two years, both inside and out turn white, completely devoid of odor, making it usable. Grind extremely fine, process using the water-floating method multiple times, then grind ten thousand times. If an offensive odor remains, soak and float repeatedly, approximately hundreds of times, until odorless. Calcined forms lose all essence and increase fire toxicity, rendering them unsuitable for use.