《灵枢》又云∶身有所伤血出多，反中风寒，若有所坠堕，四肢懈惰不收，名曰体惰。
取小腹脐下三结交。阳明、太阴也，脐下三寸关元也。（寒热篇 三结交者，即关元穴是也）
刘宗浓曰∶打扑金创损伤，是不因气动而病生于外，外受有形之物所伤，乃血肉筋
骨受病，非如六淫七情为病，有在气、在血之分也。所以损伤一证，专从血论，但须分
其有瘀血停积，而亡血过多之证。盖打扑坠堕皮不破而内损者，必有瘀血，若金创伤皮
出血，或致亡血过多，二者不可同法而治。有瘀血者，宜攻利之，若亡血者，兼补而行之。
又察其所伤，有上下轻重浅深之异，经络气血多少之殊。唯宜先逐瘀血，通经络，和血
止痛，然后调气养血，补益胃气无不效也。顷见围城中，军士被伤，不问头面、手足、胸
背轻重，医者例以大黄等药利之；后大黄缺少，甚者遂以巴豆代之，以为不于初时泻去
毒瓦斯，后则多致危殆，至于略伤手指，亦悉以药利之。殊不知大黄之药惟与有瘀血者相
宜，其有亡血过多，元气胃气虚弱之人，不可服也；其巴豆大热有毒，止能破坚逐积，用
于此疾，尤非切当。所以有服下药过后，其脉愈见坚大，医者不察，又以为瘀血未尽而
后下之，因而夭折人命，可不慎欤。
The *Ling Shu* (Spiritual Pivot) also states: When the body suffers trauma with excessive blood loss, it may subsequently be affected by wind-cold; or if one falls from a height, resulting in flaccidity and weakness of the four limbs that cannot be controlled, this condition is termed "Ti Duo" (Body Languor).
Treatment should target the San Jie Jiao (Triple Union Intersection) located below the umbilicus on the lower abdomen. The San Jie Jiao refers to the intersection of the Foot-Yangming Stomach Channel and the Foot-Taiyin Spleen Channel, which is the Guanyuan (CV-4, Gate of Origin) acupoint, three cun below the umbilicus. (From the chapter "Han Re Pian"; the commentator notes that San Jie Jiao is indeed the Guanyuan acupoint.)
Liu Zongnong stated: Injuries caused by beating, striking, or metal wounds are not diseases arising internally due to qi disturbance, but rather injuries inflicted by external有形 (material/physical) objects, damaging flesh, blood, sinews, and bones. This differs from diseases caused by the Six Excesses (Wind, Cold, Summerheat, Dampness, Dryness, Fire) and Seven Emotions, which have distinctions between being in the Qi level or the Blood level. Therefore, injury syndromes are specifically discussed from the perspective of Blood. However, one must distinguish between cases with stagnant blood accumulation and those with excessive blood loss. Generally, injuries from beating or falling where the skin remains intact but internal damage occurs will inevitably involve stagnant blood. Conversely, metal wounds that break the skin and cause bleeding may lead to excessive blood loss. These two conditions cannot be treated with the same method. For cases with stagnant blood, purgative methods to remove stasis are appropriate; for cases with excessive blood loss, tonification should be combined with blood-invigorating methods.
Furthermore, one must observe the site of injury, noting differences in location (upper/lower), severity (light/heavy), and depth (superficial/deep), as well as variations in the abundance of Qi and Blood within different meridians. Treatment should first focus on expelling stagnant blood, unblocking the meridians, harmonizing the Blood to relieve pain, and only then regulating Qi, nourishing Blood, and tonifying Stomach Qi. Such an approach is invariably effective.
Recently, in a besieged city, I observed that when soldiers were injured, regardless of whether the wound was on the head, face, hands, feet, chest, or back, and regardless of severity, physicians uniformly administered purgatives such as Radix et Rhizoma Rhei (Dahuang, 大黄). Later, due to a shortage of Dahuang, even more severe cases substituted it with Fructus Crotonis Tiglii (Badou, 巴豆), under the belief that failing to purge toxic pathogens initially would lead to critical danger later. Consequently, even minor finger injuries were treated with purgatives. They failed to realize that Radix et Rhizoma Rhei is suitable only for those with stagnant blood; it is contraindicated for those with excessive blood loss and deficient Yuan Qi (Original Qi) and Stomach Qi. Fructus Crotonis Tiglii is extremely hot and toxic, capable only of breaking firm accumulations and driving out stagnation; its use for these injuries is particularly inappropriate. Therefore, after patients took purgatives, their pulses often became firmer and larger. Physicians, failing to examine this correctly, assumed the stagnant blood was not yet fully expelled and administered further purgatives, thereby causing premature death. Can one not be cautious?