枫之余气所结。生土底。不必枫根下始有也。
甘淡苦平。气味俱薄。升而微降。阳中阴也。入足太阳少阴经。主开腠理。利水道。治
渴除湿。去心中懊 。通淋消肿。并香港脚作肿。疗白浊带下。妊娠子淋。胎肿小便不利。
疟蛊疰。伤寒温疫大热。发汗解毒。禀戊土之阳气。得风木之阴气。苦泄滞。甘助阳。淡利
窍。利水道诸剂。无若此驶。（颂）湿在脾胃者。必用猪苓泽泻以分理之。能使水之泛于经
络者敛归故道。猪苓淡渗。气升能降。故开腠理利小便。与茯苓同功。但入补药。不如茯苓。
（濒湖）止泄精。脾经湿热流入肾经。用以渗泄。中病即止。（门）入五苓散。为除湿要药。
伤寒太阳证。消渴脉浮。小便不利。有五苓散。少阴证渴而下利。兼呕咳。不眠。小便不利
者。用猪苓汤。世遂指猪苓。止入足太阳少阴二经。（小便不利。何以致渴。盖真水化气。
水化不行。则气化郁矣。津液又为气所化。气不化。津液何自而生。经曰。脾主为胃行其津
液者也。湿胜则脾困。湿热胜。则寒水之化亦困。安得不渴。）不知五苓有白术茯苓等味。
其治在中下焦。而猪苓有滑石阿胶等味。并上中下而治之。况猪苓汤即阳明证之脉浮发热渴
欲饮水小便不利者。亦用之矣。安得谓其止入太阳少阴哉。佐白芍白术茯苓人参橘皮泽泻。
治水肿之属阳分者。佐白芍生地桑寄生桑白皮茯苓泽泻琥珀石斛薏仁肉桂。治水肿之属阴分
者。小儿大便不通。猪苓一两。以水少许煮。鸡矢白一钱调服。通身肿满。小便不利。猪苓
五两。为末。热水调方寸匕。日三服。又治妊娠子肿。从脚至腹。小便不利。微渴引饮。妊
娠子淋。方亦同上。日三夜二服。以通为度。
〔论〕人身水液。为元气所化。人身元气。又为真水所生。故病于气。即不能化水。而
滞于水。更有以病气。水与气。一而二二而一者也。水气之治。有补气以化水者。责其本也。
有行水以起气者。急其标也。却又有分其阴阳以为治者。因气病于水。则阳蓄于阴中。猪苓
能升阳出于阴中。（故雷公法。用升麻对蒸一日。甚有理。）使阳不为阴所圉而阴降于下。此
其与渗利差异者也。夫阴阳不得相离。离则病。此味分隔阴阳。能使阳离于阴。其行湿处。
即其大燥津液处。故洁古曰。无湿证弗服也。本经。首主 疟。后学无能明其义者。惟肯堂
治疟用猪苓。以分隔阴阳。使阳不下陷于阴。与洁古升而微降之说相合。然则此味岂止司渗
泄。而无分理阴阳以为水气之主者哉。（猪苓升而微降。从阳畅阴。泽泻沉而降。从阴达阳。
二味合乃为分理阴阳。）人身之气。由肾而脾。而肺。经故曰。三焦者水谷之道路。气之所
终始也。明此则惟深究于病之所因。乃可投之。不则阴阳之不容分者而强分之。贻患甚矣。
此药除湿。比诸淡渗药。大燥亡津液。无湿证勿服。（洁古））久服。损肾气。昏人目。
（宗 ）
〔修治〕内白而实者佳。铜刀刮去粗皮用。同升麻对蒸一日。（雷公）取其行湿。生用
良。
枫树余气凝结而成，生长于土壤底层。并非一定要在枫树根下才能找到。
味甘、淡，性苦平。气味都很淡薄，作用趋势为上升而略微下降，属于阳中之阴。归足太阳膀胱经和足少阴肾经。主治开启腠理（皮肤毛孔及肌肉间隙），通利水道，治疗口渴、祛除湿气，消除心中烦闷不适，通淋消肿，并治香港脚（脚气病）引起的肿胀，治疗白浊、带下，妊娠期间的小便淋沥不畅（子淋）、胎肿及小便不利，疟疾、蛊毒、疰病，伤寒、温疫引起的大热，发汗解毒。禀受戊土（胃/脾属阳土）的阳气，获得风木（肝/胆属阴木）的阴气。苦味能泄滞，甘味能助阳，淡味能利窍。在利水道的方剂中，没有比这更迅猛的。（宋代苏颂注：湿气在脾胃部位的，必须用猪苓、泽泻来分消理导。能使泛滥于经络的水液收敛回归正道。猪苓淡渗，气升而能降，所以能开腠理、利小便。功效与茯苓相同，但用于补益药中，则不如茯苓有效。（明代李时珍注：止泄精。因脾经湿热流入肾经，用猪苓来渗泄湿热，中病即止。（门人注：入五苓散，是除湿的要药。伤寒太阳证，出现消渴、脉浮、小便不利的，用五苓散；少阴证，口渴且下利，兼有呕吐、咳嗽、失眠、小便不利的，用猪苓汤。世人于是认为猪苓只入足太阳、足少阴二经。（小便不利为何会导致口渴？因为真水化气，水液代谢不行，则气化郁滞。津液又由气所化生，气不化，津液从何而生？《内经》说：脾主为胃行其津液。湿胜则脾困，湿热胜，则寒水之化亦被困阻，怎能不渴？）不知道五苓散含有白术、茯苓等药，其治疗重点在中下焦；而猪苓汤含有滑石、阿胶等药，并治上中下三焦。况且猪苓汤也用于治疗阳明证见脉浮、发热、口渴欲饮水、小便不利的情况，怎么能说它只入太阳、少阴二经呢？配伍白芍、白术、茯苓、人参、橘皮、泽泻，治疗属于阳分的水肿；配伍白芍、生地、桑寄生、桑白皮、茯苓、泽泻、琥珀、石斛、薏仁、肉桂，治疗属于阴分的水肿。小儿大便不通，用猪苓一两，加少许水煮，取汁调服鸡矢白一钱。全身肿满，小便不利，用猪苓五两，研为末，热水调服方寸匕，每日三次。又治妊娠子肿，从脚至腹，小便不利，微渴引饮，妊娠子淋，方剂同上，每日三次夜间二次服用，以通畅为度。
〔论述〕人身的水液，是由元气所化生的；人身的元气，又是由真水所生成的。所以病在气，就不能化水，从而停滞于水；更有因病在气而导致水病，水和气是一体两面、互为因果的关系。治疗水气病，有通过补气来化水的，这是追究根本；有通过行水来起气的，这是急救标症。却又有一种方法是区分阴阳来进行治疗的。因为气病于水，则阳气蓄积于阴中。猪苓能升发阳气出于阴中。（所以雷公制药法，用升麻对蒸一日，很有道理。）使阳气不被阴气所围困，而阴气下降于下。这正是它与一般渗利药物的不同之处。阴阳不能分离，分离就会生病。此药能分隔阴阳，使阳离于阴。它在行湿的地方，也就是大燥津液的地方。所以张元素（洁古）说：没有湿证不要服用。《神农本草经》首先主治疟疾，后学之人无人能阐明其义。只有肯堂在治疗疟疾时用猪苓，通过分隔阴阳，使阳气不下陷于阴，这与张元素“升而微降”的说法相吻合。那么这种药岂止主管渗泄，而没有作为分理阴阳、主治水气的药物呢？（猪苓升而微降，从阳畅达阴；泽泻沉而降，从阴通达阳。两味药合用，才是分理阴阳。）人身之气，由肾传脾，再传肺，所以说：三焦是水谷的道路，气终结和开始的地方。明白这一点，才能深入探究病因，然后投药。否则，将本不容分割的阴阳强行分割，造成的祸患就非常严重了。此药除湿，比起其他淡渗药，更容易大燥亡失津液，无湿证勿服。（张元素注）久服，损伤肾气，使人目昏。（陈藏器注）
Formed by the residual qi of maple trees, it grows at the bottom of the soil. It is not necessarily found only under maple roots.
It is sweet, bland, and bitter in flavor, and neutral in nature. Its aroma and taste are both thin. Its action ascends slightly and descends marginally, belonging to Yin within Yang. It enters the Foot-Taiyang (Bladder) and Foot-Shaoyin (Kidney) meridians. It governs opening the *Couli* (pores and interstitial spaces), promoting water passages, treating thirst, eliminating dampness, removing mental restlessness (*Ao Nu*), unblocking strangury, reducing swelling, and treating Hong Kong foot (podagra/foot-jing) with swelling, leukorrhea, vaginal discharge, strangury during pregnancy (*Zi Lin*), fetal edema, and difficult urination, malaria, gu-toxin, zhu-disease, high fever caused by Shanghan (Cold Damage) or Wenyi (Warm Epidemic), inducing sweating, and detoxifying. It inherits the Yang Qi of Wu Earth (Stomach/Spleen as Yang Earth) and obtains the Yin Qi of Wind-Wood (Liver/Gallbladder as Yin Wood). Bitterness drains stagnation, sweetness assists Yang, and blandness benefits orifices. Among agents that promote water passages, none acts more swiftly than this. (Song Su Song: When dampness resides in the Spleen and Stomach, Zhu Ling and Ze Xie must be used to separate and regulate it. This causes water overflowing into collaterals to converge back to its proper path. Zhu Ling is bland and permeating; its Qi ascends yet can descend, thus opening Couli and promoting urination. Its function is similar to Fu Ling, but when used in tonifying formulas, it is inferior to Fu Ling. (Ming Li Shizhen: Stops seminal emission. When Damp-Heat from the Spleen channel flows into the Kidney channel, Zhu Ling is used to permeate and drain it; stop taking it once the disease is addressed. (Disciple's note: Enters Wu Ling San, serving as a key herb for eliminating dampness. In Shanghan Taiyang syndrome, presenting with excessive thirst, floating pulse, and difficult urination, Wu Ling San is used. In Shaoyin syndrome, presenting with thirst and diarrhea, accompanied by vomiting, cough, insomnia, and difficult urination, Zhu Ling Tang is used. The world thus points out that Zhu Ling only enters the Foot-Taiyang and Foot-Shaoyin two meridians. (Why does difficult urination lead to thirst? Because True Water transforms into Qi. If water transformation fails, Qi transformation becomes stagnant. Jin Ye (Body Fluids) are also transformed by Qi. If Qi does not transform, how can Jin Ye be generated? The Classic states: The Spleen governs transporting Jin Ye for the Stomach. Excess dampness confuses the Spleen; excess Damp-Heat confuses the transformation of Cold Water. How can there be no thirst?) One does not know that Wu Ling San contains Bai Zhu, Fu Ling, etc., targeting the Middle and Lower Jiao, whereas Zhu Ling Tang contains Shi Gao, E Jiao, etc., treating all three Jiaos. Moreover, Zhu Ling Tang is also used for Yangming syndrome presenting with floating pulse, fever, thirst with desire to drink, and difficult urination. How can one say it only enters Taiyang and Shaoyin? Combined with Bai Shao, Bai Zhu, Fu Ling, Ren Shen, Ju Pi, Ze Xie, it treats edema belonging to the Yang portion. Combined with Bai Shao, Sheng Di, Sang Ji Sheng, Sang Bai Pi, Fu Ling, Ze Xie, Hu Po, Shi Hu, Yi Yi Ren, Rou Gui, it treats edema belonging to the Yin portion. For infants with constipation, use 1 liang of Zhu Ling, boil with a small amount of water, and administer mixed with 1 qian of Ji Shi Bai. For generalized full-body edema and difficult urination, use 5 liang of Zhu Ling, powder it, mix with hot water to take a "Fang Cun Bi" dose, three times daily. It also treats pregnancy-induced fetal edema (*Zi Zhong*) spreading from feet to abdomen, with difficult urination and slight thirst with desire to drink, and pregnancy strangury (*Zi Lin*). The formula is the same as above, taken three times daily and twice at night, until patency is achieved.
[Discussion] Body fluids are transformed by Yuan Qi (Original Qi); conversely, Yuan Qi is generated by Zhen Shui (True Water). Therefore, if Qi is diseased, it cannot transform water, leading to water stagnation; furthermore, Qi disease can cause Water disease, where Water and Qi are two aspects of one entity. In treating Water-Qi disorders, some treat by tonifying Qi to transform water, addressing the root; others treat by moving water to revive Qi, addressing the branch urgently. Yet another method distinguishes Yin and Yang for treatment. Since Qi disease affects Water, Yang accumulates within Yin. Zhu Ling can ascend Yang out of Yin. (Thus, Lei Gong's processing method, steaming with Sheng Ma for one day, is very reasonable.) It ensures Yang is not confined by Yin, allowing Yin to descend below. This is precisely its difference from general permeating-draining agents. Yin and Yang cannot separate; separation leads to disease. This herb separates Yin and Yang, allowing Yang to depart from Yin. Where it moves dampness, it dries up Jin Ye (Body Fluids). Thus, Zhang Yuansu (Jie Gu) stated: Do not take it without dampness syndromes. The *Shennong Ben Cao Jing* first lists it for treating malaria, yet later scholars failed to clarify its meaning. Only Kentang used Zhu Ling for malaria, separating Yin and Yang to prevent Yang from sinking into Yin, which aligns with Jie Gu's theory of "ascending and slightly descending." Then, isn't this herb not merely governing permeation and drainage, but also serving as the master for regulating Yin-Yang and governing Water-Qi? (Zhu Ling ascends and slightly descends, smoothing Yin from Yang; Ze Xie sinks and descends, reaching Yang from Yin. Together, they regulate Yin and Yang.) Human Qi travels from Kidney to Spleen, then to Lung. Hence it is said: The San Jiao (Triple Burner) is the pathway of food and fluid, where Qi begins and ends. Understanding this allows one to deeply investigate the cause of disease before administering medicine. Otherwise, forcibly dividing what cannot be divided—Yin and Yang—will cause severe harm. This herb eliminates dampness; compared to other bland-permeating herbs, it greatly dries and depletes Jin Ye. Do not take it without dampness syndromes. (Jie Gu Note) Long-term use damages Kidney Qi and blurs vision. (Zong Note)
[Processing] Those that are white inside and solid are superior. Scrape off the coarse skin with a copper knife before use. Steam against Sheng Ma for one day. (Lei Gong) To utilize its damp-moving property, raw use is good.