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If a metallic weapon injury (Jinchuang, trauma caused by metal weapons) fails to heal for a long time, with continuous discharge of pus and failure of muscle regeneration, it is because there are broken bones, severed tendons, stagnant blood, and necrotic flesh inside the wound, or foreign bodies such as iron blades or bamboo splinters remain in the body for a long time without being expelled, preventing the wound from healing. The wound tends to exude clear fluid. In this case, one should incise and remove these foreign bodies; the wound will then heal.

For metallic weapon injuries that fail to heal for a long time, it is appropriate to apply the Bai Lian San (White Peony Root Powder) prescription.
Bai Lian (Radix Paeoniae Rubrae, two liang), Huang Qin (Coptidis Rhizoma, two liang), Mang Cao (Artemisia argyi leaf, two liang), Di Song (three liang), Duan Shi (Calamina, five liang), Gou Tou Gu (Canis Cranium, five liang, calcined to ash).
The above herbs are finely ground into powder through a fine sieve and applied to the wound for immediate effect.

For metallic weapon injuries that fail to heal for a long time, it is appropriate to use the Duan Shi San (Calcined Calamine Powder) prescription, which expels wind-dampness, reconnects bones and tendons, stops pus and bleeding, and promotes tissue regeneration.
Duan Shi (Calamina, one sheng), juice of Di Song seedlings, Xi Xin end (Asari Radix et Rhizoma powder, two liang), juice of Xuan Fu Gen roots, juice of Ge leaves, juice of Qing Hao, juice of Maidong seedlings, juice of Mei seedlings [each of the above one liang], Zhu Zhi (Porcine Fat, one jin, refined).
Mix all the herb juices with Duan Shi and add the fat, blend into cake shapes, dry them in the sun, and grind into a fine powder. Apply to the wound. It is even better if prepared on the fifth day of the fifth lunar month.

For metallic weapon injuries that fail to heal for a long time, damaging bones and tendons, with unceasing pain, use the Qi Lin Xue San (Qilin Blood Powder) prescription.
Qi Lin Xue (three liang), Huang Dan (Lithargyrum, five liang, stir-fried until purple), Bai Lian (Radix Paeoniae Rubrae, five liang), Bai Ji (Rhizoma Bletillae, five liang), Ge Bu (Ramie Cloth, three chi, calcined to ash).
The above herbs are finely ground into powder through a fine sieve and applied dry directly to the injured area for immediate effect.

For metallic weapon injuries and internal damage that fail to heal for a long time, it is appropriate to apply the Mo Yao San (Myrrh Powder) prescription.
Mo Yao (Myrrha, half liang), Gan Jiang (Zingiberis Rhizoma, half liang, processed until cracked and cut), Mi Tuo Seng (Litharge, half liang), Hong Lan Hua Zi (Carthami Flos, half liang), Qi Lin Xue (half liang), Ci Huang (Realgar, half liang, stir-fried until yellow).

For metallic weapon injuries that fail to heal for a long time, when other medicines have been ineffective, it is appropriate to use the Mi Tuo Seng Fu San (Litharge Application Powder) prescription.
Mi Tuo Seng (Litharge, twelve liang), Huang Dan (Lithargyrum, one jin, stir-fried until purple), Sheng Ji Cao (one jin), Bai Lian (Radix Paeoniae Rubrae, half jin), Tu Jue Bai (ten liang), Duan Shi (Calamina, one jin, stir-fried).
The above herbs are ground and sifted into powder, applied to the wound, covered with silk cloth, and kept sealed to prevent moisture.

Another prescription.
Take Di Yu (Sanguisorbae Radix) or Song Zhi (Pinus Resin) three to four jin, pound into a paste, make into cakes, and apply to the wound; it will heal.

Another prescription.
Take the bark of the White Poplar tree, finely cut, dry by heating, pound, and pass through a fine sieve to make a powder. Each dose: mix two qian with warm wine and take orally, three to four times daily.