大全云∶肾主腰脚，产后腰痛者，为女人肾位系于胞，产则劳伤肾气，损动胞络，虚未
平复而风冷客之，冷气乘腰，故令腰痛也。若寒冷邪气连滞背脊，则痛久未已，后忽有娠，
必至损动，盖胞络属肾，肾主腰故也。
薛氏曰∶前证真气虚，邪乘之者，用当归黄 汤，或十全大补汤为主，佐以寄生汤，如
不应，用十全大补加附子。
一产妇腰痛腹胀，善噫，诸药皆呕。余以为脾虚血弱，用白术一味炒黄，每剂一两，米
泔煎，饮时匙许，四剂后渐安，百余剂而愈。（诸药皆呕，但用白术，而分两煎法服法皆妙）
当归黄 汤 治产后失血过多，腰痛，身热自汗。
当归（二两） 黄 白芍（炒，各二两）
上 咀，每服六钱，加生姜五片，水一盏半煎至一盏，温服不拘时。
玄胡四物汤 治血癖腹痛及血刺腰痛。
当归 川芎 白芍 熟地（各七钱半） 玄胡索（酒煮，二两）
上为细末，每服三钱，酒调下。
如神汤 治产后瘀血腰疼。
玄胡索 当归 桂心（各等分）
上水煎服。
又如神汤（即生料五积散加桃仁）逐败血，去风湿。
五积散方见前腹痛条。
广济方 治产后虚冷，血气流入腰腿，痛不可转。
败酱（血凝者宜之，惜败酱之难觅也） 当归（各八分） 川芎 芍药 桂心（各六分）
上 咀，水二升煮取八合，分温二服，忌葱。
寄生防风汤 治产后风邪头眩，腰痛不可转侧，四肢沉重，行步艰难。（此方治久痛
之因外感者）
独活 川芎 芍药（炒黄） 桂心 续断 生姜 桑寄生（各六分） 当归 防风（各八分）
上锉，水煎服。
桃仁汤 治产后恶露方行，忽然渐少，断续不来，腰中重痛，或流注两股，痛如锥刺，此
由血滞于经络，不即通之，必作痈疽，宜桃仁汤，恐作痈者，预服五香连翘汤。
桃仁（去皮尖） 苏木 生地（各半两） 虻虫（炒，去翅足） 水蛭（炒，各三十个）
上每服三钱，水煎，空心热服，恶露下即住服。
五香连翘汤 治产后瘀血，腰痛作痈。
木香 丁香 沉香 乳香 麝香 升麻 独活 桑寄生 连翘 木通（各二两）
上为粗末，每服五钱，水煎，入竹沥少许服。（既为瘀血，何以只用五香行气，盖为病血
于气也。麝香分两恐误）
The *Daquan* states: The Kidney governs the waist and feet. Postpartum lower back pain occurs because a woman's Kidney is anatomically connected to the uterus (Bao Gong). Childbirth labors and injures Kidney Qi, damaging the uterine collaterals. If wind-cold pathogens invade before the deficiency has recovered and stabilized, cold qi attacks the waist, causing lower back pain. If cold pathogenic factors linger in the spine, the pain persists for a long time. If pregnancy occurs subsequently, it will inevitably cause damage, because the uterine collaterals belong to the Kidney, and the Kidney governs the waist.
Xue notes: For the aforementioned symptoms caused by deficiency of True Qi with pathogenic invasion, use Danggui Huangqi Tang (Angelica and Astragalus Decoction) or Shiquan Dabu Tang (Ten Complete Tonifying Decoction) as the principal formula, assisted by Sangjisheng Tang (Mulberry Mistletoe Decoction). If there is no response, add Fuzi (Prepared Aconite Root) to Shiquan Dapu Tang.
A postpartum patient presented with lower back pain, abdominal distension, frequent belching, and vomiting after taking various medicines. I diagnosed this as Spleen deficiency and Blood weakness. I used only Baizhu (Atractylodes Macrocephala Rhizome), stir-fried until yellow, one liang per dose, decocted in rice washing water. She drank one spoonful at a time. After four doses, she gradually stabilized; after more than one hundred doses, she was cured. (It is ingenious that when all medicines induce vomiting, only Baizhu is used, with specific dosage, decoction method, and administration instructions.)
Danggui Huangqi Tang: Treats excessive blood loss after childbirth, lower back pain, body heat, and spontaneous sweating.
Danggui (Angelica Sinensis Radix, two liang), Huangqi (Astragali Membranacei Radix), Baishao (Paeoniae Radix Alba, stir-fried, each two liang).
Chop the herbs. Take six qian per dose, add five slices of Shengjiang (Zingiberis Rhizoma Recens), decoct one and a half cups of water to one cup. Take warm at any time.
Xuanhu Siwu Tang: Treats abdominal pain due to blood stasis and stabbing lower back pain due to blood stagnation.
Danggui (Angelica Sinensis Radix), Chuanxiong (Ligusticum Chuanxiong Rhizoma), Baishao (Paeoniae Radix Alba), Shudi (Rehmanniae Radix Preparata, each seven and a half qian), Xuanhusuo (Corydalis Rhizoma, wine-boiled, two liang).
Grind into fine powder. Take three qian per dose, mix with wine and swallow.
Rushen Tang: Treats lower back pain due to blood stasis after childbirth.
Xuanhusuo (Corydalis Rhizoma), Danggui (Angelica Sinensis Radix), Guixin (Cinnamomi Cortex, equal parts).
Decoct in water and take orally.
You Rushen Tang (Shengliao Wuji San modified with Taoren): Expels retained blood, dispels wind-dampness.
See the formula for Wuji San (Five Accumulations Powder) under the previous section on abdominal pain.
Guangji Fang: Treats postpartum deficiency-cold, where blood and qi flow into the waist and legs, causing severe pain preventing movement.
Baijiang (Patriniae Herba, suitable for blood coagulation, though difficult to source), Danggui (Angelica Sinensis Radix, each eight fen), Chuanxiong (Ligusticum Chuanxiong Rhizoma), Shaoyao (Paeoniae Radix), Guixin (Cinnamomi Cortex, each six fen).
Chop the herbs. Decoct in two sheng of water to obtain eight ge. Divide into two warm doses. Avoid scallions.
Sangjisheng Fangfeng Tang: Treats postpartum dizziness due to wind-pathogen, lower back pain preventing turning or side-bending, heaviness in the four limbs, and difficulty walking. (This formula treats chronic pain caused by external contraction.)
Duhuo (Angelicae Pubescentis Radix), Chuanxiong (Ligusticum Chuanxiong Rhizoma), Shaoyao (Paeoniae Radix, stir-fried until yellow), Guixin (Cinnamomi Cortex), Xuduan (Dipsaci Radix), Shengjiang (Zingiberis Rhizoma Recens), Sangjisheng (Taxilli Cacumen, each six fen), Danggui (Angelica Sinensis Radix), Fangfeng (Saposhnikoviae Radix, each eight fen).
Cut the herbs. Decoct in water and take orally.
Taoren Tang: Treats cases where lochia (E Lu) initially flows but suddenly decreases, stops intermittently, accompanied by heavy stabbing pain in the waist or radiating to the thighs. This is due to blood stagnation in the collaterals. If not treated immediately, abscesses may form. Use Taoren Tang. To prevent abscess formation, pre-administer Wuxiang Lianqiao Tang.
Taoren (Pruni Persicae Semen, peeled and removed of tips), Sumu (Sappan Lignum), Shengdi (Rehmanniae Radix, each half liang), Mengchong (Blaberidae Insect, stir-fried, wings and feet removed), Shizhi (Hirudo, stir-fried, thirty each).
Take three qian per dose, decoct in water, take hot on an empty stomach. Stop taking once lochia is discharged.
Wuxiang Lianqiao Tang: Treats postpartum blood stasis causing lower back pain and abscess formation.
Muxiang (Aucklandiae Radix), Dingxiang (Caryophylli Flos), Chenxiang (Aquilariae Lignum Resinatum), Ruxiang (Olibanum), Shexiang (Moschus), Shengma (Cimicifugae Rhizoma), Duhuo (Angelicae Pubescentis Radix), Sangjisheng (Taxilli Cacumen), Lianqiao (Forsythiae Fructus), Mutong (Akebiae Caulis, each two liang).
Grind into coarse powder. Take five qian per dose, decoct in water, add a small amount of Zhuli (Bambusa Textilis Culmis Succus) and take. (Since this is blood stasis, why use only five aromatic herbs to move Qi? It is likely because the pathology involves Qi affecting Blood. The dosage of Shexiang may be erroneous.)