膀胱象水，旺于冬。足太阳其经也，肾之腑也。五谷五味之津液悉归于膀胱，气化分入
血脉，以成骨髓也；而津液之余者，入胞则为小便。
其气盛为有余，则病热，胞涩，小便不通，小腹偏肿痛，是为膀胱气之实也，则宜泻之
。膀胱气不足，则寒气客之，胞滑，小便数而多也，面色黑，是膀胱气之虚也，则宜补之。
其汤熨针石，别有正方，补养宣导，今附于后。
《养生方·导引法》云∶蹲坐，欹身，弩两手向前，仰掌，极势，左右转身腰三七。去
膀胱内冷血风、骨节急强。
又云∶互跪，调和心气，向下至足，意里想气索索然，流布得所，始渐渐平身，舒手傍
肋，如似手掌纳气出气不止，而觉急闷，即起；脊至地，来去二七。微减膝头冷、膀胱宿病
、腰脊强、齐下冷闷。
三焦者，上焦、中焦、下焦是也。上焦之气，出于胃上口，并咽以上，贯鬲，布胸内，
走掖，循太阴之分而行，上至舌，下至足阳明，常与荣卫俱行，主内而不出也。
中焦之气，亦并于胃口，出上焦之后，此受气者，泌糟粕，承津液，化为精微，上注于
肺脉，乃化而为血。主不上不下也。
下焦之气，别回肠，注于膀胱而渗入焉，主出而不内。故水谷常并居于胃，成糟粕而俱
下于大肠也。谓此三气，焦干水谷，分别清浊，故名三焦。三焦为水谷之道路，气之所终始
也。
三焦气盛为有余，则胀，气满于皮肤内，轻轻然而不牢，或小便涩，或大便难，是为三
焦之实也，则宜泻之；三焦之气不足，则寒气客之，病遗尿，或泄利，或胸满，或食不消，
是三焦之气虚也，则宜补之。
诊其寸口脉迟，上焦有寒；尺脉迟，下焦有寒；尺脉浮者，客阳在下焦。
膀胱在象数上对应水，其气旺于冬季。足太阳经是膀胱的经脉，肾是膀胱的外腑（表里关系）。五谷五味所化生的津液都汇聚到膀胱，经过气化作用分流进入血脉，从而生成骨髓；而剩余的津液，进入胞中则形成小便。
如果膀胱之气过盛属于有余，就会发生热病，导致胞中涩滞，小便不通，小腹偏侧肿痛，这是膀胱气实的表现，治疗应当采用泻法。如果膀胱之气不足，寒气就会侵袭，导致胞中滑脱，小便频数且量多，面色发黑，这是膀胱气虚的表现，治疗应当采用补法。
至于汤药、熨贴、针刺、砭石等疗法，另有专门的方剂，补养和导引的方法，现在附在后面。
《养生方·导引法》说：蹲坐，身体倾斜，双手用力向前伸展，手掌向上，尽力做到极致，左右转身扭腰三十一次。可以去除膀胱内的冷血风邪、骨节拘急强直。
又说：互跪（一种跪姿），调和心气，意念向下至足部，想象气息索索然流动分布得当，然后慢慢起身，手舒张靠近肋骨，好像手掌纳气和呼气不停止，如果感到急促胸闷，就立即停止；背部着地，往返十四次。可以减轻膝盖寒冷、膀胱旧疾、腰脊强直、脐下冷闷。
三焦，就是上焦、中焦、下焦。上焦之气，出于胃的上口，沿着咽喉向上，穿过膈肌，散布在胸内，走向腋下，循行于太阴经的分野而行，上行至舌，下行至足阳明经，常与营气、卫气一起运行，主司向内布散而不外泄。
中焦之气，也汇并于胃口，位于上焦之后，这是受纳谷气的部位，它泌别糟粕，承接津液，化为精微物质，向上注入肺脉，进而化生为血液。主司不上不下，保持平衡。
下焦之气，分别回肠，注入膀胱并渗入其中，主司排出废物而不纳入。所以水谷通常共同居住在胃中，变成糟粕后一起下行进入大肠。称这三种气能“焦干”（腐熟蒸腾）水谷，分别清浊，所以称为三焦。三焦是水谷运行的道路，也是气终结和起始的地方。
三焦之气过盛属于有余，就会出现胀满，气充满于皮肤之内，轻轻软软但不坚固，或者小便涩滞，或者大便困难，这是三焦实证的表現，治疗应当采用泻法；三焦之气不足，寒气就会侵袭，出现遗尿，或者泄泻痢疾，或者胸满，或者食物不消化，这是三焦气虚的表现，治疗应当采用补法。
The Bladder corresponds to Water in image, and its Qi prospers in Winter. The Foot-Taiyang Meridian is its channel, and the Kidney is its exterior organ (Fu-organ relationship). The fluids from the five grains and five flavors all converge into the Bladder; through Qi transformation, they are divided and enter the blood vessels to form Marrow; while the remaining fluids enter the Baozhong (Uterus/Bladder cavity) to become urine.
If the Qi of the Bladder is excessive, it constitutes a surplus condition, leading to Heat disease,涩滞 (stagnation) of the Baozhong, obstruction of urination, and swelling and pain in the lower abdomen, which indicates Excess of Bladder Qi; thus, purgation should be employed. If the Qi of the Bladder is deficient, Cold pathogen invades, causing滑脱 (slippage/incontinence) of the Baozhong, frequent and profuse urination, and a dark complexion, which indicates Deficiency of Bladder Qi; thus, tonification should be employed.
Regarding decoctions, moxibustion/warming applications, acupuncture, and stone needles, there are separate specific formulas. Methods for nourishment and Dao Yin (guiding and pulling exercises) are attached hereafter.
The *Yangsheng Fang · Daoyin Fa* states: Squat, lean the body, extend both hands forward with force, palms facing up, reaching the extreme limit, turning the waist left and right thirty-one times. This removes Cold Blood Wind from within the Bladder and stiffness/spasms of bone joints.
It also states: Kneel with alternating legs (Hu Gui), harmonize Heart Qi, directing intention downward to the feet, visualizing Qi flowing steadily and distributing appropriately; then slowly rise, extending hands beside the ribs, as if the palms continuously inhale and exhale Qi. If urgency or chest oppression is felt, stop immediately; lie with back on the ground, repeating fourteen times. This alleviates coldness in the knees, chronic diseases of the Bladder, stiffness of the waist and spine, and cold oppression below the umbilicus.
The Sanjiao (Triple Burner) consists of the Upper Jiao, Middle Jiao, and Lower Jiao. The Qi of the Upper Jiao originates from the upper opening of the Stomach, travels above the pharynx, penetrates the Diaphragm, spreads within the Chest, moves toward the axillae, follows the distribution of the Taiyin channel, ascends to the tongue, and descends to the Foot-Yangming channel. It usually travels together with Ying Qi (Nutritive Qi) and Wei Qi (Defensive Qi), governing internal distribution without external leakage.
The Qi of the Middle Jiao also converges at the stomach opening, emerging after the Upper Jiao. This is the site receiving Qi; it separates dregs, receives fluids, transforms them into fine essences, which ascend to inject into the Lung vessels, thereby transforming into Blood. It governs neither ascending nor descending excessively, maintaining balance.
The Qi of the Lower Jiao separates from the Hui Chang (Lower Intestine), injects into the Bladder, and渗灌 (seeps and irrigates) therein. It governs excretion without retention. Thus, water and grain commonly reside in the Stomach, transform into dregs, and descend together into the Large Intestine. These three Qi "burn" (ripen and vaporize) water and grain, distinguishing clear from turbid, hence named Sanjiao. The Sanjiao is the pathway for water and grain, and the beginning and end of Qi.
If the Qi of the Sanjiao is excessive, it constitutes a surplus condition, resulting in distension, Qi filling inside the skin, feeling light and soft but not firm, or涩滞 (obstruction) of urination, or difficulty in defecation. This is Excess of Sanjiao; thus, purgation should be employed. If the Qi of the Sanjiao is deficient, Cold pathogen invades, causing enuresis, diarrhea/dysentery, chest fullness, or indigestion. This is Deficiency of Sanjiao Qi; thus, tonification should be employed.
Palpating the Cun Kou pulse: if slow, Cold exists in the Upper Jiao; if Chi pulse is slow, Cold exists in the Lower Jiao; if Chi pulse is floating, Exogenous Yang pathogen resides in the Lower Jiao.