小儿无补肾法，盖禀父精而生，此天一生水，化生之源，肾之根也。此根日赖脾胃乳食水谷长养，男
至十六而肾始充满；既满之后，婚媾妄用亏损，则可用药补之。若受胎之时，禀之不足，则无可补；禀之
原足，又何待于补耶？
愚按小儿行迟、齿迟、解颅、囟填、五软、鹤膝、肾疳、齿豁、睛白、多愁，凡此皆因禀受肾气不足，
当以六味地黄丸加鹿茸补之。若因精气未满，而御女以通，多致头目眩晕、作渴、吐痰，或发热足热、腰
腿酸软，或自汗盗汗、二便涩痛，变生诸疾，难以名状。余常用六味、八味二丸及补中益气之剂加减用
之、无不奏效。
一小儿，九岁，解颅，足软，两膝渐大，不能行履，属肾禀不足。用六味丸加鹿茸，三月而能步履。
一小儿，十四岁，肢体倦怠，发热，晡热，口干作渴，吐痰如涌，小便淋沥，或面目赤色，身不欲衣，
此亦禀赋不足也。用补中益气汤及前丸而愈。
一小儿，十五岁而御女，大小便道牵痛，服五苓散之类，虚症蜂起，与死为邻。余用补中益气汤、加
减八味丸而愈。
一小儿，十三岁，内热，晡热，形体倦怠，食少，作渴，或用清热等药治之，虚症悉具。余以为所禀怯
弱，用六味丸加鹿茸补之，不越月而痊。盖古今元气虚实不同故也。
小儿没有专门补肾的方法，因为小儿是禀受父亲的精血而受孕出生的，这符合“天一生水”的理论，是化生万物的源头，也是肾的根本。这个根本每天依赖脾胃运化的乳食和水谷来滋养生长，男孩到十六岁时肾气才开始充盈；在肾气已经充盈之后，如果因婚配后房事过度导致亏损，才可以使用药物进行补益。如果在受孕之时，禀受的先天之气就不足，那么就没有办法通过后天药物来弥补；如果先天禀赋原本充足，又何必等待去补呢？
我按语：小儿行走迟缓、牙齿生长迟缓、解颅（囟门迟闭）、囟填（囟门高突）、五软（头项、口、手、足、肌肉软弱无力）、鹤膝风、肾疳、牙齿稀疏脱落、眼白多、多愁善感，凡此种种，都是因为禀受肾气不足所致，应当使用六味地黄丸加入鹿茸来进行补益。如果是由于精气尚未充盈，就过早地行房事，往往会导致头晕目眩、口渴、吐痰，或者发热、脚热、腰腿酸软无力，或者自汗盗汗、大小便涩痛，进而变生各种疾病，症状复杂难以名状。我常用六味地黄丸、八味地黄丸以及补中益气汤等方剂加减使用，无不取得疗效。
有一个九岁的小儿，患有解颅，双脚软弱，两个膝盖逐渐肿大，不能行走，属于先天禀受肾气不足。使用六味地黄丸加入鹿茸，三个月后就能行走。
有一个十四岁的小儿，肢体倦怠乏力，发热，午后潮热，口干口渴，呕吐痰涎如涌，小便淋漓不尽，有时面目发红，身体不喜欢穿衣，这也是先天禀赋不足的表现。使用补中益气汤配合前面的丸药而痊愈。
有一个十五岁的小儿过早行房事，导致大小便通道牵拉疼痛，服用五苓散之类的药物后，虚损的症状蜂拥而起，濒临死亡。我使用补中益气汤和加减八味地黄丸治疗而痊愈。
有一个十三岁的小儿，体内发热，午后潮热，形体倦怠，食欲减少，口渴，有人用清热类的药物治疗他，结果虚损的症状全部显现出来。我认为这是他所禀受的元气怯弱，使用六味地黄丸加入鹿茸进行补益，不超过一个月就痊愈了。这是因为古今之人元气的虚实状况不同所造成的。
There is no specific method for tonifying the Kidney in children, because they are conceived by inheriting the father's essence. This corresponds to the principle of "Heaven generates One and Water," which is the source of transformation and generation, and the root of the Kidney. This root relies daily on the nourishment from milk, food, and water and grain processed by the Spleen and Stomach to grow. A boy's Kidney Qi begins to become full only at the age of sixteen; after it is full, if deficiency occurs due to excessive sexual activity following marriage, then medicinal tonification can be used. If the congenital endowment was insufficient at the time of conception, there is nothing that can be supplemented; if the original endowment was sufficient, why would supplementation be necessary?
My commentary: Conditions such as delayed walking, delayed tooth eruption, Jie Lu (delayed closure of fontanelles), Xian Tian (bulging fontanelles), Wu Ruan (weakness of the head/neck, mouth, hands, feet, and muscles), He Xi Feng (crane-knee deformity), Shen Gan (Kidney rickets), loose teeth, excessive sclera visibility, and melancholy are all caused by insufficient congenital Kidney Qi. These should be treated with Liu Wei Di Huang Wan (Six-Ingredient Pill with Rehmannia) added with Lu Rong (Cervus Nippon Cornu). If sexual intercourse occurs prematurely before Essence and Qi are fully matured, it often leads to dizziness, thirst, expectoration, fever, heat in the feet, soreness and weakness of the waist and legs, spontaneous sweating, night sweats, or painful and difficult urination and defecation, giving rise to various diseases with complex symptoms difficult to describe. I commonly use modifications of Liu Wei Di Huang Wan (Six-Ingredient Pill with Rehmannia), Ba Wei Di Huang Wan (Eight-Ingredient Pill with Rehmannia), and Bu Zhong Yi Qi Tang (Tonify the Middle and Augment the Qi Decoction), achieving consistent efficacy.
A nine-year-old child presented with Jie Lu (delayed closure of fontanelles), weak legs, gradually enlarging knees, and inability to walk, attributable to insufficient congenital Kidney endowment. Treatment with Liu Wei Di Huang Wan (Six-Ingredient Pill with Rehmannia) added with Lu Rong (Cervus Nippon Cornu) allowed him to walk after three months.
A fourteen-year-old child presented with limb fatigue, fever, afternoon tidal fever, dry mouth and thirst, profuse expectoration, dribbling urine, sometimes red face and eyes, and aversion to clothing. This was also due to insufficient congenital endowment. Recovery was achieved using Bu Zhong Yi Qi Tang (Tonify the Middle and Augment the Qi Decoction) combined with the aforementioned pill.
A fifteen-year-old child engaged in sexual intercourse prematurely, resulting in pulling pain in the urinary and intestinal tracts. After taking formulas similar to Wu Ling San (Five-Ingredient Powder with Poria), deficiency symptoms arose rapidly, bringing him near death. I treated him with Bu Zhong Yi Qi Tang (Tonify the Middle and Augment the Qi Decoction) and modified Ba Wei Di Huang Wan (Eight-Ingredient Pill with Rehmannia), resulting in recovery.
A thirteen-year-old child presented with internal heat, afternoon tidal fever, physical fatigue, poor appetite, and thirst. When treated with heat-clearing medications, deficiency symptoms manifested completely. I attributed this to his weak congenital constitution and treated him with Liu Wei Di Huang Wan (Six-Ingredient Pill with Rehmannia) added with Lu Rong (Cervus Nippon Cornu). He recovered within a month. This is because the constitution of Yuan Qi (Original Qi) differs between ancient and modern times.