肾主虚无实。地黄丸主之。
唯疮疹肾实则黑陷。此非钱氏之语。乃记者之误焉而不详者也。以启后人之疑。有泻肾
。如百祥丸之类。有补肾泻肾之论。令儿夭折。尽信书则不如无书也。盖人之一身。肺主皮
毛。心主血脉。脾主肌肉。肝主筋。肾主骨髓。五脏之有肾。犹四时之有冬也。疮疹之毒。
乃自骨髓出现于筋肉血脉皮肤之外。如品物之翕聚于冬者。发散而为春之生。夏之长。秋之
收也。变黑归肾则不能发散于外。而反陷于内。此肾中真气之虚。邪气之实。所以立百祥丸
牛李膏以泻肾中之邪气。非泻肾之真气也。况肾中之水。润泽光壮。由津液之充满也。疮疹
黑陷者。正肾主虚。水不胜火。津
良法。详见痘疹心要。
诸虚不足。胎禀怯弱者。皆肾之本脏病也。
五脏病后成肾虚者。各用地黄丸加减随证。惟疮疹归肾有补有泻。变黑倒陷者。宜百祥
丸牛李膏泻之。泄泻灰白痒塌者。宜陈氏异功散补之。（详见痘疹心要。）
兼见肝证。惊风及手足痈者。宜地黄丸加牛膝当归续断各二两肉桂一两为末蜜丸服。
兼见心证。惊风及失音不语者。宜地黄丸加石菖蒲柏子仁远志各二两为末蜜丸服。
兼见脾证。吐泻及变痢疾者。宜地黄丸加黄连黄柏各酒炒二两干姜炒车前子肉豆蔻面煨
各一两为末蜜丸服。
兼见肺证。咳嗽痰中有血。宜地黄丸。加天门冬麦门冬焙知母黄柏蜜水炒阿胶炒各二两
蜜丸服。
陈氏异功散
木香 人参 当归 陈皮 肉豆蔻（煨） 丁香 浓朴（各钱半） 肉桂 茯苓 白术（各
二钱） 半夏 附子（炮各一钱） 上锉。姜二片。枣二枚。煎服。
The Kidney governs deficiency and does not govern excess. It should be treated with Dihuang Wan (Rehmannia Pill).
However, in the case of sores and rashes (chorezhen), if the Kidney is in a state of excess, black depression occurs. This statement is not from Qian Yi, but rather an inaccurate record by scribes, which has caused confusion among later generations. Some advocate for draining the Kidney, using formulas such as Baixiang Wan (Hundred Auspicious Pills); discussions on tonifying and draining the Kidney have led to premature death in children. Blindly believing books is worse than having no books at all. Generally, in the human body, the Lung governs skin and hair, the Heart governs blood vessels, the Spleen governs muscles, the Liver governs sinews, and the Kidney governs bone marrow. The Kidney among the Five Zang organs is analogous to Winter among the Four Seasons. The toxic pathogen of sores and rashes emerges from the bone marrow and disperses outward to the muscles, blood vessels, and skin. This is like all things gathering and storing during Winter, then dispersing to generate in Spring, grow in Summer, and harvest in Autumn. If the rash turns black and returns to the Kidney, it cannot disperse outward but instead sinks inward. This indicates that the True Qi within the Kidney is deficient, while the pathogenic factor is excessive. Therefore, Baixiang Wan and Niuli Gao (Cow Plum Paste) are established to drain the pathogenic factors in the Kidney, not the True Qi of the Kidney. Moreover, the Water of the Kidney moistens and strengthens the body, which depends on the abundance of Body Fluids. Black depression in sores and rashes is precisely due to Kidney deficiency, where Kidney Water fails to control Heart Fire, leading to exhaustion of fluids. The proper treatment methods are detailed in Douzhen Xinyao (Heart Essentials of Smallpox and Measles).
Various conditions of deficiency and insufficiency, or weak congenital endowment, belong to diseases of the Kidney's own organ.
After diseases of the Five Zang organs result in Kidney deficiency, Dihuang Wan should be modified according to specific symptoms. However, regarding sores and rashes returning to the Kidney, there are both tonifying and draining methods: for cases turning black and collapsing inward, Baixiang Wan or Niuli Gao should be used to drain; for cases with diarrhea, grayish-white stool, itching, and collapse, Chen Shi Yigong San (Chen’s Extraordinary Skill Powder) should be used to tonify. (See Douzhen Xinyao.)
If accompanied by Liver symptoms, such as convulsions and abscesses on the hands and feet, Dihuang Wan should be combined with Niuxi (Achyranthes Root), Danggui (Angelica Sinensis), Xuduan (Dipsacus Root), each 2 liang, and Rougui (Cinnamon Bark), 1 liang, ground into powder and formed into honey pills for administration.
If accompanied by Heart symptoms, such as convulsions and loss of voice/speechlessness, Dihuang Wan should be combined with Shichangpu (Acorus Tatarinowii), Baiziren (Biota Seed), and Yuanzhi (Polygala Root), each 2 liang, ground into powder and formed into honey pills for administration.
If accompanied by Spleen symptoms, such as vomiting, diarrhea, and transformation into dysentery, Dihuang Wan should be combined with Huanglian (Coptis Rhizome) and Huangbai (Phellodendron Bark), each 2 liang wine-fried, Ganjiang (Dried Ginger) fried, Cheqianzi (Plantago Seed), and Roudoukou (Nutmeg), each 1 liang roasted in flour, ground into powder and formed into honey pills for administration.
If accompanied by Lung symptoms, such as coughing with blood in the sputum, Dihuang Wan should be combined with Tianmendong (Asparagus Tuber), Maimendong (Ophiopogon Tuber) baked, Zhimu (Anemarrhena Rhizome), Huangbai (Phellodendron Bark) stir-fried with honey water, and Ejiao (Donkey-hide Gelatin) stir-fried, each 2 liang, formed into honey pills for administration.
Chen Shi Yigong San (Chen’s Extraordinary Skill Powder)
Muxiang (Costus Root), Ren Shen (Ginseng Root), Danggui (Angelica Sinensis), Chenpi (Citrus Reticulata Peel), Roudoukou (Nutmeg, roasted), Dingxiang (Clove), Nongpo (Magnolia Bark), each 1.5 qian; Rougui (Cinnamon Bark), Fuling (Poria), Baizhu (Atractylodes Macrocephala Rhizome), each 2 qian; Banxia (Pinellia Tuber), Fuzi (Aconite Lateralis Radix Praeparata, processed), each 1 qian. All ingredients are cut. Add two slices of fresh ginger and two dates, decoct, and take orally.