蛇眼疔在甲旁生，甲后名为蛇背疔，蛀节疔生中节骨，蛇腹指内鱼肚形，泥鳅疽生
遍指肿，牵引肘臂热 疼。看生何指分经络，总由脏腑火毒成。
【注】此证有五∶如蛇眼疔生于指甲两旁，形如豆粒色紫，半含半露，硬似铁钉；蛇背
疔生于指甲根后，形如半枣，色赤胖肿；蛀节疔又名蛇节疔，生于中节，绕指俱肿，其
色或黄、或紫；蛇腹疔又名鱼肚疔，生于指中节前面，肿如鱼肚，色赤疼痛；泥鳅疽一
指通肿，色紫，形如泥鳅， 热痛连肘臂。初起俱宜服蟾酥丸汗之，外敷雄黄散，次服仙
方活命饮，脓熟开之，贴琥珀膏煨脓生肌；虚不能敛者，补之。但此五证，总不外乎火毒
凝结而成。至于属何经脏，临证看生何指以辨之。
\r蛇眼疔图\p04-34a164.bmp\r
\r蛇背疔图\p04-34a165.bmp\r
\r蛀节疔图\p04-34a166.bmp\r
\r蛇腹疔图\p04-34a167.bmp\r
\r泥鳅疽图\p04-34a168.bmp\r
手指经络，各详注首卷。
蟾酥丸（见疔疮门）
雄黄散（见蛇头疔）
仙方活命饮（见肿疡门）
琥珀膏（见头部发际疮）
代指每生指甲身，先肿 热痛应心，轻溃微脓重脱甲，经脉血热是其因。
【注】此证生于手指甲身内，由经脉血热凝结而成。初起先肿 热，疼痛应心，宜用
甘草、朴硝各五钱，熬水浸洗即瘥。痛仍不止，三四日后，指甲背面上微透一点黄白色，
此系内脓已成，但无门溃出，急用线针在指甲身就脓近处捻一小孔，脓方得出，随手捏
尽余脓，用黄连膏贴之易愈。或失治，或过敷凉药，以致肌肉寒凝，脓毒浸淫好肉，爪
甲溃空，必然脱落，用琥珀膏贴之，一两月即愈。
\r代指图\p04-34a169.bmp\r
黄连膏（见鼻部鼻疮）
琥珀膏（见头部发际疮）
蛇眼疔（一种生于指甲旁的疔疮）生长在指甲旁边，生长在指甲后面的称为蛇背疔（一种生于指甲根后的疔疮），蛀节疔（一种生于指中节的疔疮）生长在中节骨处，蛇腹疔（一种生于指腹的疔疮）在手指内部肿胀如鱼肚形状，泥鳅疽（一种手指弥漫性肿胀的疽证）生长时整个手指肿胀，疼痛和发热牵引至肘部和手臂。观察发生在哪根手指以区分所属经络，这些病症总归是由脏腑火毒引起的。
【注】此病证有五种：如蛇眼疔生于指甲两旁，形状像豆粒，颜色紫暗，半露出甲外，质地坚硬似铁钉；蛇背疔生于指甲根部后面，形状像半个枣子，颜色红赤且肿胀；蛀节疔又名蛇节疔，生于中指节，环绕手指全部肿胀，颜色或黄或紫；蛇腹疔又名鱼肚疔，生于手指中节前面，肿胀如鱼肚，颜色红赤且疼痛；泥鳅疽是一指整体肿胀，颜色紫暗，形状像泥鳅，热痛牵连肘臂。初起时都适宜服用蟾酥丸（Chansu Wan, Toad Venom Pill）使其发汗，外用雄黄散（Xionghuang San, Realgar Powder）敷贴，随后服用仙方活命饮（Xianfang Huoming Yin, Immortal Life Decoction），脓液成熟后切开引流，贴上琥珀膏（Hupo Gao, Amber Plaster）以煨脓生肌；体质虚弱不能收敛伤口者，予以补益治疗。但这五种病证，总不外乎是火毒凝结而成。至于属于哪条经络、哪个脏腑，临证时需根据发生的手指来辨别。
代指（指甲下积脓脱甲之证）每发生于指甲身内，起初肿胀、发热、疼痛感应于心，轻症溃破流出少量脓液，重症则指甲脱落，经脉血热是其病因。
【注】此证生于手指指甲内部，由经脉血热凝结而成。初起先出现肿胀、发热，疼痛感应于心，宜用甘草（Gancao, Licorice Root）、朴硝（Puxiao, Natrii Sulfas）各五钱，熬水浸泡清洗即可痊愈。如果疼痛仍不止，三四日后，指甲背面微透出一小点黄白色，这是内部脓液已成，但无出口溃破，急需用线针在指甲上靠近脓处捻一个小孔，脓液才能排出，随即捏尽剩余脓液，用黄连膏（Huanglian Gao, Coptis Ointment）贴敷容易愈合。或者因失治，或过度敷用凉药，导致肌肉寒凝，脓毒浸淫好肉，爪甲溃空，必然脱落，用琥珀膏贴敷，一两月即可痊愈。
Sheyan Ding (Ding [carbuncle] appearing at the nail edge) arises beside the nail plate; those arising behind the nail root are named Shebei Ding (Ding [carbuncle] on the dorsal nail fold). Zhujie Ding (Ding [carbuncle] of the joint) occurs at the middle phalanx. Shefu Ding (Ding [carbuncle] of the finger pulp) presents with swelling in the finger resembling a fish belly. Niqiu Ju (Ju [abscess] resembling a loach) manifests as diffuse swelling of the entire finger, with heat and pain radiating to the elbow and arm. One must observe which finger is affected to determine the involved meridian; generally, these conditions arise from Fire-Toxin accumulated in the Zang-Fu organs.
[Note] There are five types of this condition:
1. Sheyan Ding arises on both sides of the nail plate, shaped like a bean, purple in color, half-exposed, and hard like an iron nail.
2. Shebei Ding arises behind the nail root, shaped like half a jujube, red and swollen.
3. Zhujie Ding, also known as Shejie Ding, arises at the middle phalanx, with circumferential swelling of the finger; the color may be yellow or purple.
4. Shefu Ding, also known as Yudu Ding, arises on the anterior aspect of the middle phalanx, swelling like a fish belly, red and painful.
5. Niqiu Ju involves diffuse swelling of one finger, purple in color, shaped like a loach, with heat and pain radiating to the elbow and arm.
In the early stage, it is appropriate to administer Chansu Wan (Toad Venom Pill) to induce sweating, apply Xionghuang San (Realgar Powder) externally, and subsequently take Xianfang Huoming Yin (Immortal Life Decoction). Once pus has matured, incise and drain, then apply Hupo Gao (Amber Plaster) to promote pus formation and tissue regeneration. For patients with deficiency who cannot heal, tonification therapy should be used. These five conditions all stem from the coagulation of Fire-Toxin. Regarding which meridian or Zang-Fu organ is involved, diagnosis should be made clinically based on the specific finger affected.
Daizhi (Subungual abscess leading to nail shedding) typically occurs within the nail bed. Initially, there is swelling, heat, and pain that seems to affect the heart. Mild cases may ulcerate with slight pus discharge, while severe cases result in nail loss. The etiology is Heat in the Blood vessels and meridians.
[Note] This condition arises inside the fingernail due to the coagulation of Heat in the Blood vessels and meridians. In the initial stage, there is swelling and heat, with pain radiating to the heart region. It is advisable to boil Gancao (Radix Glycyrrhizae) and Puxiao (Natrii Sulfas), each 5 qian, in water for soaking and washing, which will lead to recovery. If pain persists, after three to four days, a small yellowish-white spot may appear on the dorsal surface of the nail, indicating that internal pus has formed but lacks an outlet. Urgently use a thread needle to prick a small hole near the pus on the nail plate to allow drainage. Squeeze out any remaining pus, then apply Huanglian Gao (Coptis Ointment) for easy healing. Alternatively, if treatment is delayed or excessive cooling herbs are applied, causing Cold coagulation in the muscles and infiltration of pus-toxin into healthy tissue, the nail may become hollowed out and inevitably shed. Applying Hupo Gao (Amber Plaster) will lead to recovery within one to two months.