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After the healing of a metal weapon injury (Jinchuang), although the muscles are full and robust, the limbs cannot flex or extend. This is due to the severing of the Jingjin (Meridian Sinews), causing Ying and Wei (Nutritive and Defensive Qi) to fail in their normal circulation. Although the wound has healed, the sinews remain tense, preventing flexion and extension.

At the initial stage of a metal weapon injury, if the sinews are partially severed, the circulation of Ying and Wei Qi becomes obstructed. Even if the wound subsequently heals, it may later lead to numbness and loss of sensation (Bi Buren). If the injury severs the joints, torso, elbows, wrists, knees, thighs, or ankles, although suturing can reconnect the tissues, it must be done urgently while the area is warm. The fragmented bones should be removed before re-suturing while the Qi and Blood are still warm. Otherwise, upon healing, the limb may become straight and unable to flex or extend. If the fragmented bones are not removed, it causes painful irritability and continuous discharge of pus and blood. If this discharge does not cease, the body cannot find peace. For all those injured by metal weapons, their Shen Spirit...

If an arrowhead or metal blade penetrates the bone, causing it to shatter, the arrowhead must be extracted, and all fragmented bones should be thoroughly removed before applying medication. Otherwise, the wound will never heal. Even if it does heal, it will often remain painful. If further contact or trauma occurs, it may cause fright-induced hemorrhage, with blood boiling and bursting, potentially leading to death.

The condition known as Jinchuang Jing (Spasm caused by metal weapon injury) arises from the depletion of blood vessels and failure of dietary recovery within less than a month. The Ying and Wei Qi are damaged and penetrated, allowing Wind Qi to enter. When the Five Zang Organs are affected by Cold, spasm occurs. The manifestations include: tightness of the mouth, rigidity of the back, shaking of the head, sounds resembling a horse's neigh, opisthotonos (arching of the back), frequent attacks within a short time, breath appearing to cease, and profuse sweating like rain. Without timely rescue... If a metal weapon injury suddenly presents with no exudate, it indicates invasion by Wind; if yellow fluid spontaneously oozes from the edges, it indicates invasion by Water toxicity. Both conditions may develop into spasm and require urgent treatment. Furthermore, the pain is not located at the wound site...

After the healing and closure of a metal weapon injury, sudden frightening swelling may occur. Upon touch, it feels like rotting boiling water and throbs against the hand. Large swellings resemble a basin, while small ones resemble a cup. This is termed "Dao Xue" (Robbing Blood). This occurs because the muscle tissue has not yet stabilized and the interior is not fully filled. Due to overexertion or rising early, "Dao Xue" surges out and accumulates under the skin. It refuses to dissipate on its own, does not form pus, but instead forms a hard nodule. There is also a condition called "Jia Xue" (Added Blood), which refers to the fullness caused by "Dao Xue". This coagulated blood is deep-seated and should not be punctured recklessly. If punctured, the preceding "Dao Xue" will gush out uncontrollably, followed by the "Jia Xue". Once expelled, it fills the wound cavity and stagnates, causing shortness of breath and potentially leading to death within moments.