五指丫处结毒 肿者，除大指合谷穴名合谷疽，余皆名手丫发，俗名手丫支、手背丫，
是手三阳经受证；手掌心丫，是手三阴经受证。初起如粟，渐大如豆， 热疼痛不止。此皆
由湿火凝聚而成。初起宜疏散清热解毒；成功后其脓不透，即以制蚕、角针透之；待脓泄邪
退，扶胃而和其营，然后收功。
合谷疽，又名虎丫毒。此手阳明大肠经湿热之毒结聚之所致也。初起黄粟小泡，热痒
痛根深。有红在线攻腋内者，即名合谷疔。若初起如豆，渐至漫肿，坚硬 痛而不可忍者，
名合谷疽。治法与前证同。
蛇头疔，又名天蛇毒，又名调疽。生手大拇指顶头，或生他指。初起如粟，渐大如豆，
或如桃李，坚硬 赤肿痛，疼极连心；又或青或白，乍黄乍紫乍黑，或痒或麻木不痛，自筋
骨发出，根深毒重，属手太阴肺、手厥阴心包络经热毒结聚而成。甚则手背手心皆肿，指头
皮硬。当以猪胆套之，或以雄黄散涂之，与以蟾酥丸发汗解毒，更服银花解毒汤。若四、五
日后溃脓，有黄头可刺者，顺；如不溃无脓，黑色过节者，险。其药即进凉膈，或黄连解毒
汤、犀角地黄汤等。若毒瓦斯攻心，呕吐不食，膨胀，齿缝出血，是为危候。此证脓未熟时不
可开刀早，否则致皮裂肉 ，疼痛倍增，不能速愈。若患久即有多骨，多骨出始能收口，虚
而不敛者能补之。更有脓不泄，火毒不化，腐烂其筋，至落去一节者。
蛇眼疔，生于手指甲旁尖角间，形如豆粒，色紫半含半露，硬如铁钉。亦火毒所发。若
有黄头出如眼者，即以针挑破之。
水蛇头，指头有黄泡明亮者是。亦宜挑破，去其恶水即愈。
在五指指缝处发生的疮毒，如果肿胀部位位于大拇指与食指之间的合谷穴区域，称为“合谷疽”，其余指缝发生的则统称为“手丫发”，俗称“手丫支”或“手背丫”。这些病症属于手三阳经（手阳明大肠经、手少阳三焦经、手太阳小肠经）受邪的证候；而发生在手掌心指缝间的，则属于手三阴经（手太阴肺经、手厥阴心包经、手少阴心经）受邪的证候。发病初期像粟米大小，逐渐增大如豆粒，伴有发热和持续疼痛。这都是由湿火凝聚而成的。初起时宜用疏散解毒、清热的方法治疗；如果脓成后不能自行破溃排出，就用制过的蚕矢或角针将其刺破引流；待脓液排出、邪气消退后，再调理脾胃、调和营血，如此才能痊愈。
合谷疽，又名虎丫毒。这是由手阳明大肠经受湿热毒邪结聚所致。初起时有黄色粟米状小泡，感觉热、痒、痛，病根深固。如果有红线向上延伸至腋下的，就称为“合谷疔”。如果初起像豆粒，逐渐发展为弥漫性肿胀，坚硬且疼痛难忍的，称为“合谷疽”。其治疗方法与前一种证候相同。
蛇头疔，又名天蛇毒，又名调疽。生于手指大拇指顶端，也可能生于其他手指。初起像粟米，逐渐增大如豆粒，或者像桃李果实一样，坚硬、发红、肿胀、疼痛，疼痛剧烈甚至牵连心脏；有时颜色呈青色或白色，忽黄忽紫忽黑，有时瘙痒或麻木不痛。此病从筋骨深处发出，病根深、毒性强，属于手太阴肺经和手厥阴心包络经的热毒结聚而成。严重时手背和手心都会肿胀，指头皮变硬。应当用猪胆套敷患处，或用雄黄散涂抹，内服蟾酥丸以发汗解毒，同时服用银花解毒汤。如果四五天后果然化脓，有黄色脓头可以刺破的，为顺证；如果不溃破、无脓，且黑色蔓延过关节的，为险证。此时药物可选用凉膈散，或黄连解毒汤、犀角地黄汤等。如果毒邪攻心，出现呕吐、无法进食、腹部膨胀、齿缝出血等症状，则是危重征象。此证在脓未成熟时不可过早切开，否则会导致皮肤破裂、肌肉损伤，疼痛加倍，难以迅速愈合。如果患病日久，可能会长出死骨，只有死骨排出后才能收口愈合，对于气血虚弱不能敛疮的情况，可用补益法治疗。更有甚者，脓液无法排出，火毒无法化解，腐蚀筋脉，导致指节脱落。
蛇眼疔，生于手指甲旁边的尖角处，形状像豆粒，颜色紫红，半露出皮外，质地坚硬如铁钉。这也是由火毒引发的。如果有黄色脓头冒出，形状像眼睛一样，就用针挑破它。
At the junction of the five fingers, when a toxic swelling occurs: if it is located at the Hegu acupoint (LI4) between the thumb and index finger, it is named Hegu Ju (Hegu Carbuncle); those occurring in other interdigital spaces are collectively named Shou Ya Fa (Hand Interdigital Abscess), commonly known as Shou Ya Zhi or Hand Dorsal Interdigital Abscess. These conditions represent syndromes of the Three Yang Meridians of the Hand (Large Intestine, Sanjiao, Small Intestine). Those occurring in the interdigital spaces of the palm center represent syndromes of the Three Yin Meridians of the Hand (Lung, Pericardium, Heart). Initially, it resembles millet grains, gradually enlarging to the size of beans, accompanied by heat and unceasing pain. This is caused by the condensation of dampness and fire. In the early stage, dispersing, detoxifying, clearing heat, and resolving toxicity should be employed. If pus forms but fails to drain spontaneously, prepared silkworm feces or horn needles should be used to puncture and drain it. Once the pus is discharged and pathogenic factors recede, the stomach should be supported and the Ying (Nutritive) Qi harmonized to achieve recovery.
Hegu Ju, also known as Hu Ya Du (Tiger Interdigital Toxicity), is caused by the accumulation of damp-heat toxin in the Hand-Yangming Large Intestine Meridian. Initially, yellow millet-like vesicles appear, with sensations of heat, itching, and pain, and the root of the disease is deep. If red lines extend towards the axilla, it is named Hegu Ding (Hegu Furuncle). If it initially resembles a bean and gradually develops into diffuse swelling, hardness, and unbearable pain, it is named Hegu Ju. The treatment method is the same as for the preceding condition.
She Tou Ding (Snake Head Furuncle), also known as Tian She Du (Heavenly Snake Toxicity) or Tiao Ju, arises on the tip of the thumb or other fingers. Initially resembling millet, it gradually enlarges to the size of a bean or like a peach/plum fruit, becoming hard, red, swollen, and painful, with pain so severe it radiates to the heart. The color may vary between green, white, yellow, purple, or black; it may itch or feel numb without pain. Originating from deep within the tendons and bones, it has a deep root and heavy toxicity, resulting from the condensation of heat-toxin in the Hand-Taiyin Lung Meridian and Hand-Jueyin Pericardium Meridian. Severe cases involve swelling of both the dorsum and palm of the hand, with hardening of the fingertip skin. Treatment involves applying pig gallbladder externally, coating with Xionghuang San (Realgar Powder), administering Chansu Wan (Toad Venom Pill) to induce sweating and resolve toxicity, and taking Yinhua Jiedu Tang (Honeysuckle Detoxification Decoction). If suppuration occurs after four or five days with a visible yellow head that can be pricked, it is a favorable outcome (Shun). If it does not suppurate, lacks pus, and black discoloration crosses the joint, it is dangerous (Xian). Medications such as Liangge San (Cooling Chest Powder), Huanglian Jiedu Tang (Coptis Detoxification Decoction), or Xijiao Dihuang Tang (Rhinoceros Horn and Rehmannia Decoction) may be administered. If the toxin attacks the Heart, manifesting as vomiting, anorexia, abdominal distension, and bleeding from the gum margins, it is a critical prognosis. Early incision before the pus matures is contraindicated; otherwise, it causes skin rupture and muscle damage, doubling the pain and delaying healing. Prolonged illness may result in the formation of sequestra (dead bone); only after their expulsion can the wound close. For deficiency preventing closure, tonification methods should be used. In worse cases, failure to discharge pus and transform fire-toxin leads to tendon necrosis and loss of a phalanx.
She Yan Ding (Snake Eye Furuncle) arises in the sharp corners beside the fingernails, resembling a bean, with a purplish-red color, partially exposed, and hard as an iron nail. It is also caused by fire-toxin. If a yellow head emerges resembling an eye, it should be punctured with a needle.
Shui She Tou (Water Snake Head) refers to bright yellow blisters on the fingertip. These should also be punctured; draining the noxious fluid leads to recovery.