放脓拔刀用响铜打成，临时以右手大指与食指，掐住刀口，向上卧刺，方不伤好肉，
要脓口顺下流势之处，浅深量意。口欲大则刀斜出，口欲小则刀直出。脓深放浅，则内
脓不出，反泄好血。脓浅放深，则内脓虽出，好肉已伤。轻捺病处，便痛皮热，重者脓浅
而稠。重按方痛，皮稍热者，脓深而稀。遍捺患上，有一点软陷不起者，或皆硬不痛者，
脓未熟，或瘀血，若放早，必伤气血，而脓难成。捺之软而即起者，或皆软不痛者，脓
己熟，或湿水，若不放，则腐烂深，而疮难敛。肿高而软者，发于肌肉，放宜浅。肿低
而硬者，发于筋脉，放宜深。肿平皮色不变者，毒着于骨，当火针烙之。体虚者，先补
而后放。有起一二日，皮色照常，已有脓者。或十数日，皮色紫黑，尚无脓者。有数月之
久，仍须刀放者。亦有不待放而死者。故用刀针宜审。
两乳上下处，并膻中心窝，以及肚脐之上，一发外疡，溃脓后不易收功。乃气脉升
降要途，而精血难停于助长也。
人之颈项，中有二管，或自刎与刀伤，若断前管，为食管，可治。先止其血，掺生肌
药，贴以膏药，外用布条缠好，常令仰面静卧勿语，头后垫高，要使伤口合住，不可离
开，过三日上药一次，每日用米粉做细圆子吞食，不可饮汤水，及齿相呷，月余全功。若
断后管，为气管，立时殒命。
放脓拔刀需用响铜打造，临时操作时以右手大拇指与食指掐住刀口，向上倾斜刺入，这样才不会损伤健康组织。
切口位置要顺应脓液向下流动的趋势，深浅程度需根据病情酌情判断。
若希望切口较大，则刀片斜向穿出；若希望切口较小，则刀片垂直穿出。
脓液深而切口浅，则内部脓液无法排出，反而会导致健康血液流失。
脓液浅而切口深，则虽然内部脓液能排出，但健康肌肉组织已受损伤。
轻按患处即感到疼痛且皮肤发热，重者表现为脓液浅且质地稠厚。
用力按压才感到疼痛，皮肤稍显发热的，表明脓液深且质地稀薄。
全面按压患部，若有一点柔软下陷不起的，或者全部坚硬且不痛的，说明脓液尚未成熟，或是有瘀血阻滞。
此时若过早切开，必然损伤气血，导致脓液难以形成。
按压后柔软且立即回弹的，或者全部柔软且不痛的，说明脓液已经成熟，或者是湿水积聚。
此时若不切开，则腐烂加深，疮口难以愈合。
肿胀高突且质地柔软的，病发于肌肉，切开宜浅。
肿胀低平且质地坚硬的，病发于筋脉，切开宜深。
肿胀平坦且皮色不变的，毒邪附着于骨骼，应当用火针烙烫治疗。
体质虚弱者，应先进行补益治疗，然后再行切开排脓。
有的发病一两天，皮色如常，但已有脓液形成。
有的发病十几天，皮色紫黑，却还没有脓液。
有的病程长达数月，仍须用刀切开排脓。
也有不待切开就死亡的。
因此使用刀针时必须审慎。
两乳上下区域，以及膻中穴中心窝处，还有肚脐上方，一旦发生外疡，溃破排脓后不易收功愈合。
这些部位是气脉升降的关键通道，且精血难以在此处停留以助长修复。
人的颈部中间有两根管道，如果是自刎或刀伤导致断裂，若切断的是前管（食管），是可以治疗的。
首先要止血，掺敷生肌药物，贴上膏药，外用布条缠好固定，经常让患者仰面静卧不说话，头后垫高，要使伤口紧密贴合，不可分离。
过了三天换药一次，每天用米粉做成细小的圆子吞食，不可饮用汤水，也不可用牙齿咀嚼食物，一个月左右即可痊愈。
若切断的是后管（气管），则会立即死亡。
To drain pus and remove the knife, a "xiangtong" (resonant copper) blade should be used. During the procedure, use the thumb and index finger of the right hand to pinch the blade edge, piercing upwards obliquely so as not to injure healthy flesh. The incision site should follow the natural downward flow of pus, with depth determined by judgment. If a larger opening is desired, the blade should exit obliquely; if a smaller opening is desired, the blade should exit vertically. Draining deep pus with a shallow incision will fail to expel internal pus and instead cause leakage of healthy blood. Draining shallow pus with a deep incision may expel internal pus but will damage healthy tissue. Light pressure on the affected area causing pain and skin heat indicates shallow, thick pus in severe cases. Pain only upon heavy pressure with slightly warm skin indicates deep, thin pus. Palpating the entire lesion, if there is one soft, depressed spot that does not rise, or if the entire area is hard and painless, the pus is not yet mature, or there is blood stasis. Incising too early will inevitably damage Qi and Blood, making pus formation difficult. If the area is soft and rises immediately upon pressure, or is entirely soft and painless, the pus is mature, or it is fluid accumulation. Failure to incise then will lead to deep rotting and difficulty in wound healing. Swelling that is high and soft originates in the muscle; incision should be shallow. Swelling that is low and hard originates in the sinews and vessels; incision should be deep. Swelling that is flat with unchanged skin color indicates toxin adhering to the bone; fire needle cauterization should be used. For those with weak constitution, tonification should precede incision. Some cases show pus after one or two days despite normal skin color. Others show purple-black skin after ten-plus days without pus. Some cases last months and still require incision. There are also cases where death occurs before incision can be performed. Therefore, the use of knives and needles must be cautious.
The areas above and below both breasts, the center depression at the Danzhong (CV17) acupoint, and above the navel are critical pathways for the ascending and descending of Qi and vessels. External sores here are difficult to heal after ulceration and pus drainage because essence and blood cannot easily stay to promote repair.
In the human neck, there are two tubes. If severed by suicide or knife injury, severing the anterior tube (esophagus) is treatable. First, stop the bleeding, apply flesh-regenerating medicine, cover with a plaster, and bind tightly with cloth strips. Keep the patient lying supine, quiet, with the head elevated, ensuring the wound edges remain approximated. Change dressing every three days. Feed fine rice flour balls orally daily; do not drink liquids or chew solid food. Recovery takes about a month. Severing the posterior tube (trachea) results in immediate death.