其管以薄铜卷如象筋粗式，长二寸余，要中空似细竹，紧焊，其缝一头锉平，一头锉
斜尖式，用时要尖头插患孔内，少顷则脓自管中射出如箭。
脾胃郁热上蒸，口舌白腐，叠如雪片，在小儿名鹅口疮。先以牛桔汤（方见后），升发其火。
若苦寒药用早，则冰伏火势。有喉烂气喘声嗄之危。
病后阴阳两虚，中焦浮火上炎，致牙根腐臭，当六味加肉桂汤（方见后），引火下降，非
比实火，可用苦寒，以制其势。
腹胁内之痞块，初生如梅，渐大如杯，坚胀作痛，乃病后脾虚，一食鸡肉荤腥面食糯
米，不能磨化，停于脏腑之外，躯壳之内，加以血脉日裹，胶锢难散。体壮者可针灸数次，
投消坚散（方见后），缓缓消去。如虚体食少者，误针必转中满不治。
大凡膝盖以下，乃湿聚之地，湿盛生热，热结腐肌痒痛交作，血水杂流治不易效，直
如卑洼之处，日照难干，以推行散（方见后），清血热利湿邪。
一切发物为外症，尤当戒。误犯者，随加 肿溃痛，敛者复烂。医者须嘱咐病家宜
先。若小儿痘后犯之，肢体骨节，隐痛漫肿，却如注痰，延绵难效，有发症随死者，有成
生理残疾人士，即如牛羊肉、鱼、蟹、虾、蚌、鸡、鸭、海味、猪首、王瓜、芥菜、芹菜、茄子、
番瓜，扁豆，红菜头、菠菜、芋头、芫萎、菌子、香蕈、金针、赤豆、竹笋、豆腐、面食、
豆粉、面筋、鸭蛋、乌豇豆各味。
那根管子是用薄铜片卷制而成，粗细如同象牙筋，长度两寸多，中间是空的，形状像细竹管，接口处要紧密焊接。其中一端的缝隙锉平，另一端锉成斜尖状。使用时，将尖头插入患处的孔洞内，片刻之后，脓液就会像箭一样从管中射出。
脾胃中有郁结的热气向上熏蒸，导致口舌出现白色腐物，层层堆积如雪片一般，在小儿身上称为鹅口疮。先用牛桔汤（方剂见后文），以升发疏散体内的火邪。如果过早使用苦寒药物，会使火势被冰伏遏制，从而产生咽喉溃烂、气喘、声音嘶哑的危险。
疾病痊愈后，若阴阳两虚，中焦的浮火向上炎升，导致牙根腐烂发臭，应当使用六味地黄丸加肉桂汤（方剂见后文），以引火下行。这与实火不同，实火可以用苦寒药物来压制其势头。
腹部和胁部内部的痞块，初生时像梅子大小，逐渐增大如杯口，坚硬胀满且疼痛。这是由于病后脾虚，一旦食用鸡肉、荤腥、面食或糯米等难以消化的食物，停滞在脏腑之外、躯壳之内，加上血脉日复一日地包裹胶固，难以消散。体质强壮的人可以针灸数次，并服用消坚散（方剂见后文），缓缓消除痞块。如果是体质虚弱、食欲不佳的人，误用针刺必然会导致中焦胀满，成为不治之症。
大凡膝盖以下部位，是湿气聚集的地方。湿气盛则生热，热邪凝结腐蚀肌肉，导致瘙痒与疼痛交替发作，血水混杂流出，治疗不易见效。这就像低洼积水之处，即使有日照也难以晒干。应使用推行散（方剂见后文），以清泄血热、利除湿邪。
一切被称为“发物”的食物对于外科病症尤其应当禁忌。如果误食，患处会随即加重肿胀、溃烂和疼痛；原本快要愈合的伤口也会重新溃烂。医生必须事先嘱咐病人注意饮食禁忌。如果小儿出痘疹后犯了这些禁忌，肢体骨节会出现隐隐作痛、漫肿无定形的症状，如同痰湿流注，病程绵延难愈，有的甚至因此死亡，有的则留下终身残疾。所谓的发物包括：牛羊肉、鱼、蟹、虾、蚌、鸡、鸭、海鲜、猪头、王瓜、芥菜、芹菜、茄子、南瓜、扁豆、红菜头、菠菜、芋头、芫荽、蘑菇、香菇、金针菜、赤豆、竹笋、豆腐、面食、豆粉、面筋、鸭蛋、乌豇豆等各种食物。
The tube is rolled from thin copper sheet, with a thickness similar to that of an ivory tendon, and a length of slightly over two cun. It is hollow in the center, resembling a slender bamboo tube, with tightly welded seams. One end of the seam is filed flat, while the other is filed into a slanted point. During use, the pointed end is inserted into the lesion's opening; after a short moment, pus will shoot out from the tube like an arrow.
Stagnant heat in the Spleen and Stomach steams upward, causing white, rotting lesions on the mouth and tongue that pile up like snowflakes; in children, this condition is known as E Kou Chuang (Goose Mouth Ulcer). Initially, Niu Jie Tang (Ox Tuber and Platycodon Decoction) [see formula below] should be used to disperse and ascend the fire. If bitter-cold herbs are administered too early, they may freeze and trap the fire, leading to dangerous complications such as throat ulceration, asthma, and hoarseness.
After an illness, if both Yin and Yang are deficient, floating fire from the Middle Jiao flares upward, causing the gums to rot and smell foul. In such cases, Liu Wei Di Huang Wan plus Rou Gui (Six-Ingredient Rehmannia Pill with Cinnamon Bark) [see formula below] should be used to guide the fire downward. This differs from Excess Fire, which can be controlled using bitter-cold herbs to suppress its intensity.
Hard, distending, and painful masses within the abdomen and hypochondrium begin the size of a plum and gradually enlarge to the size of a cup. These arise from Spleen deficiency following an illness; consumption of chicken, meat, wheat products, or glutinous rice—which cannot be properly digested—stagnates outside the Zang-Fu organs but inside the body shell. Over time, blood vessels wrap around and glue these accumulations together, making them difficult to dissipate. Individuals with strong constitutions may undergo acupuncture several times and take Xiao Jian San (Eliminate Hardness Powder) [see formula below] to slowly resolve the masses. However, for those with weak constitutions and poor appetite, mistaken acupuncture will inevitably lead to abdominal fullness, becoming incurable.
Generally, the area below the knees is where dampness gathers. When dampness is excessive, it generates heat; heat accumulation corrodes muscle tissue, resulting in alternating itching and pain, with blood and fluid mixing and flowing out. Such conditions are difficult to treat effectively, much like low-lying depressions where sunlight struggles to dry standing water. Tu Xing San (Promote Circulation Powder) [see formula below] should be used to clear blood heat and promote the drainage of dampness.
All "Fa Wu" (Trigger Foods) must be strictly avoided in external diseases. Violating this prohibition causes immediate worsening of swelling, ulceration, and pain, and wounds that were healing will re-ulcerate. Physicians must instruct patients on these dietary restrictions beforehand. If children violate these restrictions after recovering from smallpox, they may experience vague pain and diffuse swelling in the limbs and joints, resembling Phlegm pouring through channels. The condition becomes chronic and difficult to cure; some patients may die from Fa Zheng (Trigger Disease), while others suffer permanent physical disability. Trigger foods include: beef, mutton, fish, crab, shrimp, clams, chicken, duck, seafood, pig head, Wang Gua (Trichosanthes cucumerina), mustard greens, celery, eggplant, pumpkin, adzuki beans, beetroot, spinach, taro, coriander, mushrooms, shiitake, daylily, red beans, bamboo shoots, tofu, wheat products, bean flour, gluten, duck eggs, and black cowpeas.