劳伤而生客热，血渗于胞故也。血得温而妄行，故因热流散，渗于胞而尿血也。
此劳伤肾气故也。肾藏精，精者血之所成也。虚劳则生七伤六极，气血俱损，肾家偏虚
，不能藏精，故精血俱出也。
肾弱髓虚，为风冷所搏故也。肾居下焦，主腰脚，其气荣润骨髓。今肾虚受风寒，故令
膝冷也。久不已，则脚酸疼屈弱。其汤熨针石，别有正方，补养宣导，今附于后。
《养生方·导引法》云∶两手反向拓席，一足跪，坐上，一足屈如，仰面，看气道众处
散适，极势振四七。左右亦然。始两足向前双踏，极势二七。去胸腹病，膝冷脐闷。
又云∶与跪，调和心气向下至足，意想气索索然，流布得所，始渐渐平身，舒手傍肋，
如似手掌纳气出气不止，面觉急闷，即起背至地，来去二七，微减去膝头冷，膀胱宿病，腰
脊强，脐下冷闷。
又云∶舒两足坐，散气向涌泉，可三通，气彻到，始收右足屈卷，将两手急捉脚涌泉，
挽。足踏手，挽，一时取势。手足用力，送气向下，三七，不失气之行度。数寻，去肾
内冷气、膝冷脚疼。
又云∶跪一足，坐上，两手髀内卷足，努 向下，身外扒，一时取势，向心来去二七。
左右亦然。去痔、五劳、足臂疼闷、膝冷阴疼。
又云∶卧展两胫，足十指相柱，伸两手身旁，鼻纳气七息。除两胫冷，腿骨中痛。
又云∶偃卧，展两胫两手，足外踵，指相向，以鼻纳气，自极七息，除两膝寒、胫骨疼
、转筋。
又云∶两足指向下柱席，两涌泉相拓，坐两足跟头，两膝头外扒，手身前向下尽势，七
通。去劳损阴疼膝冷、脾瘦肾干。
又云∶两手抱两膝，极势，来去摇之七七，仰头向后。去膝冷。
又云∶偃卧，展两胫，两足指左向，直两手身旁，鼻纳气七息。除死肌及胫寒。
又云∶立，两手搦腰遍，使身正，放纵，气下使得所，前后振摇七七，足并头两向，振
摇二七，头上下摇之七，缩咽举两膊，仰柔脊，冷气散，令脏腑气向涌泉通彻。
又云∶互跪，两手向后，手掌合地，出气向下。始，渐渐向下，觉腰脊大闷，还上，来
去二七。身正，左右散气，转腰三七，去脐下冷闷、膝头冷、解溪内病。
劳损导致体内产生客热，血液渗入膀胱所致。血液遇温则妄行，因此因热而流散，渗入膀胱从而出现尿血。
这是劳损损伤了肾气所致。肾主藏精，精是由血化生而成的。虚劳会导致七伤六极，气血都受到损害，肾脏偏于虚弱，不能固藏精气，所以精和血都会外泄。
这是因为肾气虚弱、骨髓空虚，被风冷邪气侵袭所致。肾位于下焦，主管腰部和下肢，其精气能滋养润泽骨髓。如今肾虚感受风寒，所以导致膝盖发冷。如果久治不愈，就会出现脚部酸痛、屈伸无力。关于汤药热敷、针刺砭石等治疗，另有专门的方剂，补养和导引疗法，现在附在后面。
《养生方·导引法》说：双手反向撑在席子上，一只脚跪坐，另一只脚弯曲如前所述，仰面，观察气道通畅之处感到舒适，尽力保持姿势并振动身体四到七次。左右两侧同样操作。开始双脚向前同时踩踏，尽力保持姿势两到七次。可去除胸腹疾病、膝盖寒冷、肚脐闷胀。
又说：跪姿时，调和心气使其向下到达足部，意想气息索索然流动分布得当，然后渐渐起身，舒展手臂靠近肋骨，如同手掌纳气和呼气不止，面部感觉急闷时，就起身背部贴地，来回做七到十四次，可轻微减轻膝盖寒冷、膀胱旧病、腰脊僵硬、脐下冷闷。
又说：伸直双腿坐下，将气导向涌泉穴，可做三次，气息通达后，再收起右脚弯曲卷起，用两手紧紧抓住脚底的涌泉穴，用力拉扯。脚踩手，拉扯，同时取势。手足用力，送气向下，做二十一次，不使气的运行偏离轨道。多次练习，可去除肾内冷气、膝盖寒冷、脚痛。
又说：单膝跪地，坐在脚上，双手在大腿内侧卷曲脚趾，用力向下，身体向外扒开，同时取势，向心方向来回做七到十四次。左右两侧同样操作。可去除痔疮、五劳、足臂疼痛闷胀、膝盖寒冷及阴部疼痛。
又说：仰卧伸展双腿，十个脚趾互相支撑，双手伸直放在身旁，用鼻子吸气七次。可去除双腿寒冷、腿骨中疼痛。
又说：仰卧，伸展双腿和双手，脚外侧脚跟相对，脚趾相对，用鼻子吸气，直到极限七次，可去除双膝寒冷、胫骨疼痛、抽筋。
又说：两脚尖向下抵住席子，两个涌泉穴相对撑开，坐在两脚后跟上，双膝向外扒开，双手身前向下尽力，做七次。可去除劳损引起的阴部疼痛、膝盖寒冷、脾脏消瘦、肾脏干枯。
又说：双手抱住双膝，尽力保持姿势，来回摇动四十九次，头部向后仰。可去除膝盖寒冷。
又说：仰卧，伸展双腿，两脚趾向左，双手伸直放在身旁，用鼻子吸气七次。可去除死肌及小腿寒冷。
又说：站立，双手握住腰部周围，使身体端正，放纵身心，气下行得到适当分布，前后振动摇动四十九次，双脚并拢头朝前振动摇动十四次，头部上下摇动七次，收缩咽喉抬起双臂，柔顺脊柱，使冷气消散，令脏腑之气通向涌泉穴并通达。
又说：交叉跪姿，双手向后，手掌合地，呼气向下。开始时，渐渐向下，感觉腰脊非常闷胀，再起身，来回做七到十四次。身体端正，左右散发气息，转动腰部二十一次，可去除脐下冷闷、膝盖寒冷、解溪穴内部疾病。
Labor injury generates exogenous heat, causing blood to seep into the bladder. Blood flows recklessly when warmed; thus, due to heat, it scatters and seeps into the bladder, resulting in hematuria (blood in urine).
This is caused by labor injury damaging Kidney Qi. The Kidneys store Essence (Jing), which is formed from Blood. Deficiency consumption leads to Seven Injuries and Six Extremes, damaging both Qi and Blood. The Kidneys become relatively deficient and fail to store Essence, causing both Essence and Blood to leak out.
This occurs because Kidney deficiency and Marrow emptiness are attacked by Wind-Cold pathogens. The Kidneys reside in the Lower Jiao (Lower Burner) and govern the waist and legs; their Qi nourishes and moistens the Marrow. Now, due to Kidney deficiency contracting Wind-Cold, the knees become cold. If prolonged without cure, it leads to soreness, pain, weakness, and limited flexion of the feet. Regarding decoctions, hot compresses, acupuncture, and stone therapy, there are separate specific formulas. Nourishing and Daoyin (guiding and pulling) methods are attached below.
The *Yangsheng Fang · Daoyin Fa* states: Extend both hands backward to press against the mat, kneel on one foot while sitting on the other, bend the remaining foot as described, look upward at the face, observe where the Qi channel feels comfortable and free, maintain the extreme posture, and vibrate the body four to seven times. Do the same on the left side. Initially, step forward with both feet simultaneously, maintaining the extreme posture for two to seven repetitions. This removes chest and abdominal diseases, knee coldness, and umbilical stuffiness.
It also states: In a kneeling position, harmonize Heart Qi to descend to the feet, visualize the Qi flowing smoothly and distributing appropriately, then slowly rise, extend arms alongside the ribs, as if the palms are inhaling and exhaling continuously. If the face feels urgent or stifled, rise and place the back flat on the ground, repeating this movement seven to fourteen times. This slightly alleviates knee coldness, chronic Bladder conditions, stiffness of the waist and spine, and cold stuffiness below the umbilicus.
It also states: Sit with both legs extended, direct Qi toward Yongquan (KI-1), performing this three times. Once the Qi penetrates through, retract the right foot, bending and curling it, grasp the Yongquan point on the sole of the foot tightly with both hands, and pull. Press the foot against the hand, pull, and assume the posture simultaneously. Exert force in hands and feet, sending Qi downward, repeating twenty-one times, ensuring the flow of Qi does not deviate. Practicing this repeatedly removes Cold Qi within the Kidneys, knee coldness, and foot pain.
It also states: Kneel on one foot, sit on it, curl toes inward with hands inside the thighs, exert force downward, push the body outward, assume the posture simultaneously, and move toward the heart for seven to fourteen repetitions. Do the same on the left side. This removes hemorrhoids, Five Labors, pain and stuffiness in feet and arms, knee coldness, and Yin pain.
It also states: Lie supine, extend both calves, interlock the ten toes, extend both hands beside the body, and inhale through the nose for seven breaths. This removes coldness in both calves and pain in the leg bones.
It also states: Lie supine, extend both calves and hands, bring the outer heels and toes together, inhale through the nose until exhaustion for seven breaths. This removes coldness in both knees, shin pain, and muscle cramps.
It also states: Point both toes downward against the mat, press the two Yongquan points apart, sit on the heels, push both knees outward, reach hands forward downward to the limit, repeating seven times. This removes Yin pain and knee coldness due to labor injury, emaciation of the Spleen, and dryness of the Kidneys.
It also states: Embrace both knees with hands, maintain the extreme posture, shake back and forth forty-nine times, and tilt the head backward. This removes knee coldness.
It also states: Lie supine, extend both calves, turn both toes to the left, extend both hands straight beside the body, and inhale through the nose for seven breaths. This removes dead flesh and coldness in the shins.
It also states: Stand, grasp the waist with both hands, keep the body upright, relax the body and mind, allow Qi to descend and distribute properly, shake front and back forty-nine times, stand with feet together and head facing forward shaking fourteen times, shake the head up and down seven times, swallow saliva and lift both shoulders, soften the spine, dissipate Cold Qi, and allow Zang-Fu Qi to penetrate through Yongquan.
It also states: Cross-kneel, extend both hands backward, press palms to the ground, exhale downward. Initially, slowly lower yourself; if you feel severe stuffiness in the waist and spine, return to the upright position, repeating this seven to fourteen times. Keep the body upright, scatter Qi left and right, rotate the waist twenty-one times. This removes cold stuffiness below the umbilicus, knee coldness, and disorders within the Jiexi (ST-41) area.