腿弯上下，有细筋，深青色，或紫色，或深红色者，（肌肤白嫩者，方有紫红色。）即是痧筋，刺之方有紫黑毒血。
其腿上大筋不可刺，刺亦无毒血，反令人心烦。腿两边硬筋上筋，不可刺，刺之恐令人筋吊。若臂弯筋色，亦如此辨之。
其余非亲见不明白，故不具载。至如头顶心一针，惟取挑破，略见微血，以泄痧毒之气而已，不可直刺。其指尖刺之太
近指甲，虽无大害，当知令人头眩。若一应刺法不过针锋微微入肉，不必深入。
背脊、颈骨上下及胸前胁肋、两背肩臂痧，用铜钱蘸香油刮之，或用刮舌 子脚蘸香油刮之。头额、腿上痧，用
绵纱线或麻线蘸香油刮之。大小腹软肉内痧，用食盐以手擦之。
尝览古人遗言∶东南卑湿之地，利用砭，所谓针刺出毒者，即用砭之道也。但放痧之人，具用铁针，轻者一针即愈，
重者数次不愈，盖因痧毒入深，一经铁气，恐不能解。余惟以银针刺之，则银性最良，入肉无毒，以之治至深之痧毒，
不尤愈于铁针乎？此余所以刺痧筋者，独有取乎银针也。
凡伤寒杂症，所犯止有一症，用药不贵乎多。痧症凶暴非常，变幻百出。如犯在气分，有兼痰兼血；在血分，有兼
食兼积，或又有兼外感内壅，往往皆然，不可执一。故用药治之，宜尽虑到，不然，一有不及，其祸不测，此所以不厌
乎多也。
在膝盖窝（腘窝）的上下方，有细小的筋脉，呈现深青色、紫色或深红色，（对于皮肤白嫩的人，才会出现紫红色。）这些就是痧筋，刺破后会有紫黑色的毒血流出。
大腿上的大筋不可针刺，即使针刺也不会放出毒血，反而会导致人心烦意乱。大腿两侧硬筋上的浅层筋脉也不可针刺，否则恐怕会导致筋脉拘挛吊起。如果手臂弯处的筋脉颜色，也按照同样的方法辨别。
其余的情况如果不是亲眼所见便无法明白，所以不再详细记载。至于头顶心这一穴位，只需挑破皮肤，略微见到微量出血，以宣泄痧毒之气即可，不可直接深刺。指尖处针刺若离指甲太近，虽然不会造成大害，但应当知道这会导致人头晕目眩。凡是所有的刺法，不过是将针尖微微刺入皮肉，不必深入。
对于背部脊柱、颈部骨骼上下以及胸前胁肋、两背肩臂部位的痧症，用铜钱蘸取香油进行刮拭，或者用刮舌子的脚部蘸取香油进行刮拭。头部额头、腿部的痧症，用棉纱线或麻线蘸取香油进行刮拭。大小腹部软肉内的痧症，用手蘸食盐擦拭。
我曾阅览古人的遗言：东南地势低洼潮湿的地方，适宜使用砭石疗法，所谓“针刺出毒”，指的就是使用砭石的方法。但是那些放痧的人，全部使用铁针，轻症一针即愈，重症多次治疗仍不痊愈，大概是因为痧毒侵入较深，一旦接触铁气，恐怕不能化解毒素。我只用银针来刺治，因为银的性质最好，进入肌肉无毒，用它来治疗极深的痧毒，难道不是比铁针更好吗？这就是我刺治痧筋时，唯独选用银针的原因。
凡是伤寒和杂症，所犯的通常只有一种病机，用药不在于多。而痧症凶险暴烈，变化多端。如果病邪侵犯在气分，可能兼夹痰湿或瘀血；在血分，可能兼夹食积或积滞，或者又兼夹外感与内壅，往往都是如此，不可固执于单一治法。因此用药治疗时，应该考虑周全，不然一旦有所疏漏，其祸患难以预测，这就是为什么用药不厌其多的原因。
Above and below the popliteal fossa (back of the knee), there are fine tendons that appear dark cyan, purple, or deep red; (in individuals with fair and tender skin, they may appear purple-red.) These are Sha tendons (tendons affected by Sha toxin); upon pricking them, dark purple-black toxic blood will flow out.
The large tendons on the thigh must not be pricked; doing so yields no toxic blood and instead causes mental restlessness. The superficial tendons on the hard tendons on both sides of the thigh must not be pricked, as this may cause tendon spasms or retraction. If the tendons in the cubital fossa (elbow crease) exhibit similar colors, they should be identified using the same criteria.
Other cases that are not clearly understood without personal observation are not recorded here. Regarding the Baihui point (GV20, located at the vertex of the head), one should only pierce the skin slightly to allow a trace of blood to emerge, thereby venting the Qi of Sha toxin; direct deep insertion is prohibited. Pricking the fingertips too close to the nail bed, while not causing major harm, should be known to induce dizziness. In all pricking methods, the needle tip should merely enter the flesh slightly; deep insertion is unnecessary.
For Sha affecting the spine, neck bones, chest, hypochondrium, and the shoulders and arms on both back sides, scrape the area with a copper coin dipped in sesame oil, or use the handle of a tongue scraper dipped in sesame oil for scraping. For Sha on the forehead and legs, use cotton yarn or hemp yarn dipped in sesame oil for scraping. For Sha within the soft flesh of the abdomen and lower abdomen, rub the area with hands dipped in salt.
I have read the ancient advice: In the low-lying and damp regions of the southeast, Bian stone therapy (stone acupuncture) is advantageous. This refers to the method of "pricking to expel toxins" using Bian stones. However, those who perform Sha release often use iron needles; mild cases heal after one prick, but severe cases do not heal after multiple attempts. This is likely because the Sha toxin has penetrated deeply, and exposure to iron Qi may fail to resolve it. I exclusively use silver needles for pricking, as silver possesses the best properties, is non-toxic when entering the flesh, and is superior to iron needles for treating deeply seated Sha toxins. This is why I specifically choose silver needles for pricking Sha tendons.
In cases of Cold Damage (Shanghan) and miscellaneous diseases, the pathogenic factor usually involves only one aspect, so medication does not need to be numerous. However, Sha disease is fierce and violent, with myriad variations. If the pathogen affects the Qi level, it may be complicated by phlegm or blood stasis; if it affects the Blood level, it may be complicated by food retention or accumulation. Furthermore, external contraction combined with internal obstruction often occurs simultaneously. One cannot adhere to a single approach. Therefore, when prescribing medication, one must consider all possibilities comprehensively; otherwise, any oversight may lead to unpredictable disasters. This is precisely why the use of medications should not disdain being numerous.