肾虚腰痛者，精气不足，足少阴气衰也。足少阴者，肾之精也。其脉贯脊属肾，抵腰中
，精
气不足，则经脉虚而痛。其症形羸气少，行立不支，而卧息少可，无甚大痛，而悠悠戚戚，
屡发不已。经云∶腰者肾之腑，转摇不能，肾将惫矣，此之谓也。丹溪云∶肾虚者，其脉大
。
《本事》麋茸丸
麋茸（鹿茸亦可） 菟丝子（制，各一两） 舶茴香（五钱）
上为末，以羊肾二对，陈酒煮烂去膜，研如泥，和丸桐子大，阴干。如羊肾少太干，以
酒糊佐之，每服三五十丸，温酒或盐汤下。
青娥丸
破故纸（四两，炒香） 杜仲（净，八两，姜汁炒） 胡桃肉（十两）
上为末，酒糊丸梧子大，每三五十丸，空心温酒送下，蜜丸亦可。《百一》补髓丹有
鹿茸二两，没药一两。
无比山药丸
赤石脂（ ） 茯苓（去皮木） 山茱萸（去核） 巴戟（去心） 牛膝（酒浸） 熟干地黄（酒
浸）
泽泻（各三两） 菟丝（酒浸） 杜仲（去皮，切，姜汁炒） 山药（各三两） 五味子（六两） 肉
苁蓉（酒浸，四两）
蜜丸梧子大，每服三十丸，空心温酒，或盐汤下。
余治一姓顾妇女，患肾虚腰痛，用猪腰二枚，破开纲盐水炒杜仲末缝好，煮熟去药，任
意服之而愈。
肾虚腰痛，是由于精气亏虚，导致足少阴肾经之气衰弱所致。足少阴经是肾所藏之精气的通道。其经脉贯穿脊柱，归属于肾脏，抵达腰部。当精气不足时，经脉空虚而引发疼痛。其症状表现为形体消瘦、气息短少，站立行走时难以支撑，躺卧休息时稍感缓解；疼痛并不剧烈，而是绵绵不绝、隐隐作痛，且反复发作，经久不愈。《内经》说：“腰是肾的府邸，如果转动摇动困难，说明肾气将要衰败了”，说的就是这种情况。朱丹溪说：“肾虚的人，脉象宏大。”
《本事方》中的麋茸丸：
麋茸（也可以用鹿茸代替）一两，菟丝子（经过炮制）一两，舶茴香五钱。
将上述药物研成细末，用羊肾两对，加入陈年美酒煮烂，去除内膜，研磨成泥状，与药末混合，制成梧桐子大小的药丸，在阴凉处干燥。如果羊肾太少导致药丸太干，可以用酒糊辅助粘合。每次服用三五十丸，用温酒或淡盐汤送服。
青娥丸：
破故纸（即补骨脂）四两，炒至香气溢出；杜仲八两，去净粗皮，用姜汁炒制；胡桃肉十两。
将上述药物研成细末，用酒糊制成梧桐子大小的药丸。每次服用三五十丸，空腹时用温酒送服，也可以制成蜜丸。《百一选方》中的补髓丹在此基础上增加了鹿茸二两、没药一两。
无比山药丸：
赤石脂三两，茯苓（去皮和木心）三两，山茱萸（去核）三两，巴戟天（去心）三两，牛膝（用酒浸泡）三两，熟干地黄（用酒浸泡）三两，泽泻三两，菟丝子（用酒浸泡）三两，杜仲（去皮，切片，用姜汁炒）三两，山药三两，五味子六两，肉苁蓉（用酒浸泡）四两。
用蜂蜜制成梧桐子大小的药丸。每次服用三十丸，空腹时用温酒或淡盐汤送服。
我曾治疗一位姓顾的妇女，患有肾虚腰痛。我用两个猪腰子，剖开后填入炒过的杜仲末，用线缝合好，煮熟后去掉药材，让她随意食用，结果痊愈了。
Lumbago due to Kidney Deficiency arises from the insufficiency of Essence and Qi, leading to the decline of Qi in the Foot-Shaoyin (Kidney) Meridian. The Foot-Shaoyin is the pathway of the Essence stored by the Kidneys. Its meridian passes through the spine, connects with the Kidneys, and reaches the waist region. When Essence and Qi are insufficient, the meridians become empty and painful. The symptoms include emaciation of the body, shortness of breath, inability to stand or walk steadily, and slight relief when lying down and resting. The pain is not severe but rather lingering and aching, recurring frequently without ceasing. The Classics state: "The loins are the mansion of the Kidneys; if one cannot turn or sway, the Kidneys are about to fail." This refers to this condition. Zhu Danxi stated: "In cases of Kidney Deficiency, the pulse is large."
Mijun Wan (Deer Antler Pill) from *Fangshu Fang*:
Milujun (Elk Antler, can be replaced with Lurong/Deer Antler), 1 liang; Tusizi (Cuscutae Semen, processed), 1 liang; Bo Huixiang (Foeniculi Fructus), 5 qian.
Grind the above ingredients into powder. Take two pairs of sheep kidneys, boil them thoroughly in aged wine, remove the membranes, and grind into a paste. Mix with the powder to form pills the size of tung tree seeds, and dry them in the shade. If there are too few sheep kidneys and the mixture is too dry, add wine paste as a binder. Take 30-50 pills per dose, administered with warm wine or salted water decoction.
Qing'e Wan (Green Elm Pill):
Poguzhi (Psoraleae Fructus, also known as Buguzhi), 4 liang, stir-fried until fragrant; Duzhong (Eucommiae Cortex), 8 liang, cleaned and stir-fried with ginger juice; Hutaorou (Juglandis Semen), 10 liang.
Grind the above ingredients into powder and make pills using wine paste, sized like walnut seeds. Take 30-50 pills per dose, taken on an empty stomach with warm wine. Honey pills are also acceptable. *Baiyi Xuansheng* mentions Buisui Dan (Marrow-Replenishing Pill), which adds Lurong (Deer Antler), 2 liang, and Moyao (Myrrhae Resina), 1 liang.
Wubi Shanyao Wan (Peerless Yam Pill):
Chishizhi (Halloysit Rubrum), 3 liang; Fuling (Poria), 3 liang (peeled); Shanzhuyu (Corni Fructus), 3 liang (pitted); Bajitian (Morindae Radix), 3 liang (core removed); Niuxi (Achyranthis Bidentatae Radix), soaked in wine, 3 liang; Shudihuang (Rehmanniae Radix Praeparata), soaked in wine, 3 liang; Zexie (Alismatis Rhizoma), 3 liang; Tusizi (Cuscutae Semen), soaked in wine, 3 liang; Duzhong (Eucommiae Cortex), peeled, sliced, stir-fried with ginger juice, 3 liang; Shanyao (Dioscoreae Rhizoma), 3 liang; Wuweizi (Schisandrae Fructus), 6 liang; Rongzhrong (Cynomorii Herba), soaked in wine, 4 liang.
Make pills with honey, sized like walnut seeds. Take 30 pills per dose, on an empty stomach with warm wine or salted water decoction.
I once treated a woman surnamed Gu who suffered from lumbago due to Kidney Deficiency. I used two pig kidneys, slit them open, stuffed them with stir-fried Duzhong (Eucommiae Cortex) powder, sewed them up, boiled them until cooked, removed the medicinal herbs, and allowed her to consume them freely. She recovered.