（尻上横骨也）统属足少阴肾经（《灵枢》曰∶足少阴之别，并经上走于心包下，外贯腰脊。
其病逆则烦心，实则闭癃，虚则腰痛。又曰∶肾盛怒而不止，则伤志，志伤则善忘其前言，腰脊不可以俯仰屈
伸，毛际色夭，死于季夏也。《素问》曰∶北风生于冬，病在肾，俞在腰股。又曰∶肾病内舍腰脊骨髓，外在
溪谷 膝。注∶ ，腓肠也，又曰∶肾脉搏坚而长，其色黄而赤者，当病折腰。又曰∶肾热病者，先腰痛胫酸，
苦渴数饮，身热，腰脊不举，骨枯而髓减，发为骨痿。又曰∶肾咳之状，咳则腰脊相引而痛。又曰∶腰者肾之
腑，转摇不能，肾将惫矣，得强者生，失强者死。又曰∶因而强力，肾气乃伤，高骨乃坏。注∶高骨，腰高之
骨也。朱丹溪曰∶诸经皆贯于肾，而络于腰脊。肾气一虚，则凡冲风受湿，伤冷蓄热，血涩气滞，水积堕伤，
与夫失志作劳，种种腰疼，叠见而层出矣。《三因方》
云∶肾着为病，其体重，饮食如故，小便自利，腰以下冷痛，如带五千钱，治宜流湿，兼用温散，肾着汤主
之）。又属足太阳膀胱经（《灵枢》曰∶足太阳之脉，挟脊抵腰中。《素问》曰∶足太阳之疟，令人腰痛头重，
寒从背起。李东垣曰∶太阳气虚，则邪客之。邪者，风、热、寒、湿皆然。寒湿多而风热少，又有房劳伤肾而
腰痛者，此由阳虚不能运动也，宜补阳。若膏粱之人，久服汤药，醉以入房，损其真阴，肾气热，腰脊痛而不
能举，久则髓减骨枯，此由阴虚生内热也，宜补阴。又曰∶防风辛温，气味俱薄，浮而升阳也。若脊痛项强，
不可回顾，腰似折，项似拔者，乃手足太阳症，正宜用之）。又属足厥阴肝经（《灵枢》曰∶足厥阴之脉，是
动则病腰痛，不可以俯仰，丈夫 疝，妇人少腹肿。《素问》曰∶厥阴之脉，令人腰痛，腰中如张弓弩弦。朱
丹溪曰∶腰软者皆肾肝伏热，治宜黄柏、防己）。兼属足阳明胃经、少阳胆经（《灵枢》曰∶腰痛、痛上寒，
取足太阳、阳明；痛上热，取足厥阴；不可以俯仰，取足少阳。《素问》曰∶少阳令人腰痛，如以针刺其皮中，
循循然不可以俯仰，不可以顾；阳明令人腰痛，不可以顾，顾如有见者，善悲。又曰∶肉里之脉，令人腰痛不
可以咳，咳则筋缩急，刺肉里之脉，为二 ，在太阳之外，少阳绝骨之后。又曰∶同阴之脉，令人腰痛，痛如
小锤居其中，怫然肿。注∶同阴，足少阳之别络也）。又属足太阴脾经（《素问》曰∶散脉令人腰痛而热，热
甚甚烦，腰下如有横木居其中，甚则遗溲。注∶散脉，足太阴之别脉也）。
（此处指尻骨上方的横骨）统属于足少阴肾经。《灵枢》记载：足少阴肾经的别络，并行向上走到心包下方，向外贯穿腰脊。如果经气逆乱则心中烦闷，实证则小便闭塞不通，虚证则腰痛。又说：肾气盛而大怒不止，会损伤志，志受损则容易忘记以前说过的话，腰脊不能俯仰屈伸，阴毛部位色泽枯槁，到了季夏时节可能死亡。《素问》记载：北风生于冬季，病位在肾，俞穴在腰股部。又说：肾病内部连属腰脊骨髓，外部反映在溪谷和膝部。注释：溪谷指腓肠肌部位。又说：肾脉搏动坚实而长，面色黄中带赤，应当发生折腰（腰部折断样疼痛）的病。又说：肾热病患者，先出现腰痛和小腿酸软，口渴多饮，身体发热，腰脊不能抬起，骨骼干枯而髓液减少，发展为骨痿。又说：肾咳的症状是，咳嗽时腰脊相互牵引而疼痛。又说：腰是肾的府库，腰部转动摇动不能自如，说明肾气将要衰竭了，得到阳气旺盛就能生存，失去阳气旺盛就会死亡。又说：因为强力劳作，肾气就会受伤，高骨（腰椎棘突等高位骨骼）就会损坏。注释：高骨，指腰部高耸的骨头。朱丹溪说：各条经脉都贯通于肾，并联络于腰脊。肾气一旦虚弱，那么凡是冲风受湿、伤冷蓄热、血涩气滞、水积堕伤，以及失志作劳等各种腰痛，就会接连不断地出现。《三因方》说：肾着病发作时，身体沉重，饮食正常，小便通利，腰以下冷痛，像带着五千枚铜钱一样沉重，治疗宜流通湿气，兼用温散法，以肾着汤为主治方剂。
又属于足太阳膀胱经。《灵枢》记载：足太阳膀胱经的脉，挟行脊柱抵达腰中。《素问》记载：足太阳经的疟疾，使人腰痛头重，寒气从背部升起。李东垣说：太阳经气虚弱，邪气就会客居其中。邪气包括风、热、寒、湿都是如此。如果是寒湿多而风热少，又有因房劳损伤肾脏而腰痛者，这是由于阳虚不能运化所致，适宜补阳。如果是膏粱厚味之人，长期服用汤药，醉酒后行房事，损伤真阴，导致肾气热，腰脊疼痛而不能抬起，时间久了则髓减骨枯，这是由于阴虚产生内热所致，适宜补阴。又说：防风辛温，气味俱薄，性浮而升发阳气。如果是脊痛项强，不能回顾，腰像要折断，项像要拔除的样子，这是手足太阳经的症状，正适宜使用防风。
又属于足厥阴肝经。《灵枢》记载：足厥阴肝经的脉，发生变动就会引起腰痛，不能俯仰，男子患疝气，女子少腹部肿胀。《素问》记载：厥阴经的脉，使人腰痛，腰部中间像张开的弓弩弦一样紧绷。朱丹溪说：腰部软弱无力都是肾肝伏热所致，治疗适宜用黄柏、防己。
兼属于足阳明胃经、少阳胆经。《灵枢》记载：腰痛，疼痛部位发冷的，取足太阳、足阳明经；疼痛部位发热的，取足厥阴经；不能俯仰的，取足少阳经。《素问》记载：少阳经使人腰痛，像针刺皮肤一样，缓缓不能俯仰，不能回头看；阳明经使人腰痛，不能回头看，回头看时好像看见异物，容易悲伤。又说：肉里之脉使人腰痛，不能咳嗽，咳嗽则筋脉收缩紧急，刺肉里之脉，分为两处针刺，位于足太阳经之外，足少阳经绝骨穴之后。又说：同阴之脉使人腰痛，痛感像有小锤子居住在中间，郁结肿胀。注释：同阴，是足少阳经的别络。
又属于足太阴脾经。《素问》记载：散脉使人腰痛且发热，热甚则烦躁，腰部下面好像有横木卡在中间，严重时甚至大小便失禁。注释：散脉，是足太阴脾经的别脉。
(The transverse bone above the sacrum) is collectively governed by the Foot-Shaoyin Kidney Meridian (Jingmai). The *Lingshu* states: The divergent branch of the Foot-Shaoyin Kidney Meridian runs parallel upward to below the Pericardium, and externally penetrates the lumbar spine. If the meridian Qi rebels, there is vexation in the heart; if Excess, there is strangury with retention of urine; if Deficiency, there is lumbago. It also states: If Kidney Qi is excessive and anger continues without stopping, it injures the Zhi (Will), and injury to the Zhi leads to forgetfulness of previous words, inability to flex and extend the lumbar spine, and a withered appearance of the hair at the pubic region, potentially leading to death in the late summer season. The *Suwen* states: North Wind arises in winter, causing disease in the Kidneys, with Shu points located in the lumbar and thigh regions. It also states: Kidney disease internally resides in the lumbar spine and marrow, and externally manifests in the Xi Gu (valleys between muscles and bones) and knees. Note: Xi Gu refers to the gastrocnemius muscle. It further states: When the Kidney pulse is firm and long, and the complexion is yellow with redness, one should expect "Zhe Yao" (lumbar pain resembling a broken waist). It also states: In Kidney Heat diseases, patients first experience lumbago and calf soreness, bitter thirst with frequent drinking, fever, inability to lift the lumbar spine, dry bones, and reduced marrow, developing into Bone Wei (bone atrophy/weakness). It also states: The manifestation of Kidney Cough is that coughing causes mutual traction and pain in the lumbar spine. It also states: The waist is the mansion of the Kidney; if turning and shaking are impossible, the Kidney Qi is about to fail. Survival depends on strength (Yang Qi), while loss of strength leads to death. It also states: Forceful exertion injures Kidney Qi, causing the Gao Gu (high bones, i.e., prominent vertebrae) to deteriorate. Note: Gao Gu refers to the high bones of the waist. Zhu Danxi said: All meridians penetrate the Kidney and connect to the lumbar spine. Once Kidney Qi is deficient, various types of lumbago—such as those caused by wind-cold-dampness, cold accumulation, heat retention, blood stasis, Qi stagnation, water accumulation, trauma, or emotional strain and overwork—will emerge continuously. The *Sanyin Fang* states: In Ren Zhuo (Kidney Dampness) disease, the body feels heavy, diet remains normal, urination is free, but there is cold pain below the waist, feeling as heavy as carrying five thousand coins. Treatment should focus on draining dampness and using warming dispersal methods, primarily with Shen Zhuo Tang.
It also belongs to the Foot-Taiyang Bladder Meridian. The *Lingshu* states: The Foot-Taiyang Bladder Meridian runs alongside the spine and reaches the middle of the waist. The *Suwen* states: Taiyang Malaria causes lumbago, heaviness of the head, and cold sensation arising from the back. Li Dongyuan stated: When Taiyang Qi is deficient, pathogenic factors invade. Pathogens include wind, heat, cold, and dampness. If cold-dampness predominates over wind-heat, and lumbago results from sexual exhaustion injuring the Kidney, this is due to Yang deficiency failing to move Qi, requiring tonification of Yang. For individuals consuming rich foods who take herbal decoctions for long periods and engage in intercourse while drunk, damaging True Yin, leading to Kidney Heat, lumbago, and spinal pain with inability to lift the body, prolonged cases result in reduced marrow and dry bones. This is due to Yin deficiency generating internal heat, requiring tonification of Yin. He also stated: Fang Feng (Saposhnikovia Root) is acrid and warm, with thin flavor and qi, floating and ascending Yang. For symptoms such as spinal pain and neck stiffness, inability to look back, waist feeling like breaking, and neck feeling like pulling, which are symptoms of the Hand and Foot Taiyang meridians, Fang Feng is precisely indicated.
It also belongs to the Foot-Jueyin Liver Meridian. The *Lingshu* states: When the Foot-Jueyin Liver Meridian is disturbed, it causes lumbago, inability to flex and extend, hernia in men, and swelling of the lower abdomen in women. The *Suwen* states: The Jueyin Meridian causes lumbago, with the waist feeling tight like the string of a drawn bow. Zhu Danxi said: Softness of the waist is due to latent heat in the Kidney and Liver, treated with Huang Bo (Phellodendron Bark) and Fang Ji (Stephania Root).
It is also associated with the Foot-Yangming Stomach Meridian and Shaoyang Gallbladder Meridian. The *Lingshu* states: For lumbago with coldness at the painful site, select Foot-Taiyang and Foot-Yangming; for heat at the painful site, select Foot-Jueyin; for inability to flex and extend, select Foot-Shaoyang. The *Suwen* states: Shaoyang causes lumbago feeling like needle pricks in the skin, slowly unable to flex and extend, and unable to look back; Yangming causes lumbago, inability to look back, hallucinations when looking back, and propensity for sadness. It also states: Rouli Mai (Muscle-Li Channel) causes lumbago where coughing makes tendons contract tightly; puncture Rouli Mai at two points, located outside Foot-Taiyang and behind Juegu of Foot-Shaoyang. It also states: Tongyin Mai causes lumbago with pain feeling like a small hammer lodged inside, accompanied by郁结 swelling. Note: Tongyin is the divergent branch of Foot-Shaoyang.
It also belongs to the Foot-Taiyin Spleen Meridian. The *Suwen* states: San Mai (Scattered Channel) causes lumbago with heat; severe heat leads to irritability, and a sensation of a horizontal log under the waist; in severe cases, incontinence occurs. Note: San Mai is the divergent channel of Foot-Taiyin.