生于指掌之中，形如茱萸，两手相对而生，亦有成攒者，起黄白脓包，痒痛无时，破津
黄汁
香末、枯矾末各八钱，雄黄细末一两，搅匀候温涂之，以痊为度。忌食动风、鸡鹅鱼腥等物
。
此证《大成》书名狐狸刺，《外台》、《总录》二书名狐尿刺。乃螳螂当甚暑交媾，精
汁染
后
盖螳螂又名野狐鼻涕，此证取名，乃本于此也。一云狐尿刺有孔刺痛有虫，用曲末和独蒜杵
匀纳疮孔中，虫出愈。
手足掌心，燥痒起皮，坚浓枯裂者，以豆腐浆沫热洗之，轻者搽砒油，每日三、四次，
至愈乃止。如日久延及遍手枯裂极重者，用二矾汤。
砒油方
红砒（一钱，敲细如粞。）
上用麻油一两，煎至砒枯烟尽为度，去砒留油听用。凡患风之处，先以火烘皮热，以油
擦之，日三次，至愈乃止。
二矾汤
白矾 皂矾（各四两） 儿茶（五钱） 侧柏叶（半斤） 上用水十碗煎汤，先用桐油搽抹患
上，
气熏蒸，勿令泄气，待汤微热蘸洗良久，一次可愈。七日忌下汤水，永不再发。
即油灰指甲。用白凤仙花捣涂指甲上，日日易之。待至凤仙过时，灰甲即好。
手生丫指，疼痛无奈，用通草为末，鸡子清调敷即愈。
治丫指方
用锻石内未烧透石子，浇生蜂蜜，在粗石上椎融，敷患处，一夜即愈。
生于手指和手掌之中，形状像茱萸，两手相对而生，也有聚集成簇的，起黄白色的脓包，瘙痒疼痛没有定时，破溃后流出黄色汁液。用香末、枯矾末各八钱，雄黄细末一两，搅拌均匀，待温度适宜时涂抹患处，以痊愈为度。忌食动风之物，以及鸡、鹅、鱼腥等食物。
此证在《外科大成》中名为狐狸刺，《外台秘要》和《医宗金鉴·外科心法要诀》（此处指代《总录》）中名为狐尿刺。这是因为螳螂在酷暑时节交配，其精液沾染所致。螳螂又名野狐鼻涕，此病取名便是基于此传说。另一种说法是狐尿刺有孔且刺痛，里面有虫，用曲末和独蒜捣匀纳入疮孔中，虫出则愈。
手足掌心干燥瘙痒，起皮，坚硬、流脓、干枯开裂的，用豆腐浆沫加热清洗患处，轻者涂抹砒油，每天三到四次，直到痊愈为止。如果日久蔓延至整个手部，干枯开裂极严重的，使用二矾汤。
砒油方：红砒一钱，敲碎如米状。用麻油一两，煎至红砒干枯、烟尽为度，去掉红砒，留下油备用。凡患风邪之处，先用火烘烤使皮肤发热，然后用油擦拭，每天三次，直到痊愈为止。
二矾汤：白矾四两，皂矾四两，儿茶五钱，侧柏叶半斤。以上药材用水十碗煎汤，先用桐油搽抹患处，盖上盖子利用热气熏蒸，不要让气泄掉，待药汤微热时蘸洗患处良久，一次即可痊愈。七天内忌接触生水，可永不复发。
即油灰指甲。用白凤仙花捣烂涂在指甲上，每天更换。等到凤仙花过时，灰指甲自然就好了。
Located in the fingers and palms, resembling cornel fruits (Zhu Yu), appearing symmetrically on both hands, or sometimes clustered together. Yellowish-white pustules arise, accompanied by intermittent itching and pain. Upon rupture, yellow exudate flows out. Apply a mixture of Xiang Mo (Fragrant powder), Ku Fan Mo (Alum powder) each weighing 8 qian, and Xiong Huang Xi Mo (Realgar fine powder) weighing 1 liang. Mix evenly, allow to cool to a suitable temperature, and apply topically until cured. Avoid foods that stir up wind, as well as chicken, goose, and fishy foods.
This condition is named "Fox Thorn" (Huli Ci) in *Waike Dacheng* (Complete Book of External Medicine), and "Fox Urine Thorn" (Huxiao Ci) in *Waitai Miyao* (Essential Prescriptions Worth a Thousand Gold for Emergencies) and *Zonglu*. It is attributed to the semen of a mantis contaminating the area during mating in intense summer heat. The mantis is also known as "Wild Fox Nasal Discharge," and the name of this condition derives from this folklore. Another theory states that Fox Urine Thorn presents with painful pores containing parasites; applying Qu Mo (Fermented grain powder) mixed with pounded single-clove garlic into the sores expels the parasites and leads to cure.
For dryness, itching, peeling, induration, suppuration, and fissuring of the palms and soles, wash the affected areas with hot foam from tofu water. For mild cases, apply Pi You (Arsenic Oil) three to four times daily until healed. For severe, chronic cases spreading over the entire hand with extreme dryness and cracking, use Er Fan Tang (Two Alum Decoction).
Pi You Formula: Hong Pi (Red Arsenic) 1 qian, crushed to the size of rice grains. Boil in 1 liang of Sesame Oil (Mahu You) until the arsenic is calcined and smoke ceases. Remove the arsenic residue and retain the oil for use. For any area affected by wind pathogens, first warm the skin with fire, then rub with the oil three times daily until cured.
Er Fan Tang: Bai Fan (White Alum) 4 liang, Zao Fan (Green Vitriol) 4 liang, Er Cha (Child's Tea/Catechu) 5 qian, Ce Bai Ye (Biota Top Leaf) 0.5 jin. Decoct these ingredients in ten bowls of water. First, apply Tung You (Tung Oil) to the affected area, cover it to trap the steam, and do not let the vapor escape. Once the decoction is slightly warm, dip and wash the area for an extended period; one treatment may suffice. Avoid contact with raw water for seven days to prevent recurrence permanently.
This refers to Onychomycosis (Greasy Gray Nail). Mash White Fengxian Hua (White Balsam Apple Flower) and apply it to the nail, changing it daily. By the time the flowering season of the balsam apple passes, the gray nails will heal.
If the nail suddenly grows inward into the flesh, causing stabbing pain like a cone, consuming Kui Cai (Malva verticillata/Sesame Mallow) will lead to recovery.
For polydactyly (Yazhi) on the hand causing unbearable pain, grind Tong Cao (Tetrapanax Pith) into powder, mix with Ji Zi Qing (Egg White), and apply topically for cure.
Formula for Treating Yazhi: Take uncalcined stones from Duan Shi (Burnt Alumen), pour raw honey over them, and grind/melt them on a rough stone. Apply to the affected area; it heals overnight.