（《别录》）
【释名】梳上者名百齿霜。
弘景曰∶《术》云，头垢浮针，以肥腻故耳。今当用悦泽人者，其垢可丸也。
【气味】咸、苦，温，有毒。
【主治】淋闭不通（《别录》）。疗噎疾，酸浆煎膏用之，立愈。又治劳复（弘景）。中蛊
毒、蕈毒，米饮或酒化下，并取吐为度（大明）。
【附方】旧八，新十六。
天行劳复∶含头垢枣核大一枚，良。（《类要》）
预防劳复∶伤寒初愈，欲令不劳复者。头垢烧研，水丸梧桐子大，饮服一丸。（《外台
秘要》）
头身俱痛烦闷者∶头垢豆许，水服。囊盛蒸豆，熨之。（《肘后》）
小儿霍乱∶梳垢，水服少许。
小儿哭疰∶方同上。
百邪鬼魅∶方同上。（并《千金》）
妇人吹乳∶百齿霜，以无根水丸梧桐子大。每服三丸，食后屋上倒流水下，随左右暖卧，
取汗甚效。或以胡椒七粒，同百齿霜和丸，热酒下，得汗立愈。（《卫生宝鉴》）
妇人乳疖∶酒下梳垢五丸，即退消。
妇人足疮，经年不愈，名裙风疮。用男子头垢，桐油调作隔纸膏，贴之。（并《简便》）。
胫生疮∶头垢、枯矾研匀，猪胆调敷。（《寿域方》）
下疳湿疮∶蚕茧盛头垢，再以一茧合定， 红，出火毒研，搽。（杨氏）
小儿紧唇∶头垢涂之。（《肘后方》）
菜毒脯毒∶凡野菜、诸脯肉、马肝、马肉毒。以头垢枣核大，含之咽汁，能起死人。或
白汤下亦可。（《千金方》）
自死肉毒∶故头巾中垢一钱，热水服，取吐。
犬毒人∶头垢、 皮等分，烧灰，水服一杯。口噤者灌之。犬咬人疮重发者。以头垢
少许纳疮中，用热牛屎封之。
诸蛇毒人∶梳垢一团，尿和敷上。仍炙梳出汗，熨之。（并《千金方》）
蜈蚣螫人∶头垢、苦参末，酒调敷之。（《箧中》）
蜂虿螫人∶头垢封之。
虫蚁螫人∶同上。（并《集简》）
竹木刺肉不出∶头垢涂之，即出。（刘涓子）
飞丝入目∶头上白屑少许，揩之即出。（《物类相感志》）
赤目肿痛∶头垢一芥子，纳入取泪。（《摘玄方》）
噫吐酸浆∶浆水煎头垢豆许，服一杯效。（《普济方》）
(From *Bie Lu* [Separate Records])
[Names] The scum scraped from combs is named "Hundred-Tooth Frost" (Baichi Shuang).
Hongjing stated: The text *Shu* records that head scum floats on needles due to its greasy and oily nature. Currently, one should use the kind that moistens and beautifies the skin; such scum can be formed into pills.
[Flavor and Properties] Salty, bitter, warm, toxic.
[Indications] Treats strangury with urinary obstruction (from *Bie Lu*). Cures yijing (dysphagia/choking disease) by decocting it in sour bean juice to make a paste; recovery is immediate. Also treats laofu (relapse of illness due to overexertion after recovery) (from Hongjing). Treats gu poison (poisoning from mysterious substances or insects) and xun poison (mushroom poisoning); dissolve in rice water or wine and administer orally, stopping when vomiting occurs (from Ming).
[Attached Formulas] Eight old formulas, sixteen new formulas.
Laofu caused by epidemic febrile diseases: Hold one piece of head scum the size of a jujube pit in the mouth; this is effective. (*Lei Yao*)
Preventing laofu: When a patient has just recovered from shanghan (cold damage disease) and one wishes to prevent relapse due to exertion. Burn the head scum to ash, grind it, and make pills the size of paulownia seeds using water. Take one pill with water. (*Waitai Miyao*)
For headache and body pain accompanied by irritability: Take a amount of head scum the size of a soybean, take with water. Fill a bag with steamed beans and apply as a hot compress. (*Zhouhou Beiji Fang*)
Pediatric huoluan (cholera-like acute gastroenteritis): Take a small amount of comb scum, take with water.
Xiao'er kuzhu (pediatric infectious disease characterized by crying): Same formula as above.
Various evil spirits and ghosts (referring to mental disturbances or fright): Same formula as above. (All from *Qianjin Fang*)
Women's chuisru (acute mastitis): Use Baichi Shuang, form pills the size of paulownia seeds using wugen water (rainwater or dew). Take three pills per dose. After meals, drink "reverse-flowing water" (water running down from the roof), lie comfortably on the warmer side, and induce sweating for significant effect. Alternatively, mix seven grains of pepper with Baichi Shuang, form pills, and take with hot wine; sweating leads to immediate cure. (*Weisheng Baojian*)
Women's ruji (breast furuncle): Take five pills of comb scum with wine; they will subside immediately.
Women's foot sores, chronic and unhealed for years, known as qinfengchuang (skirt wind sore). Use male head scum, mix with tung oil to make a plaster applied through paper, and stick to the affected area. (All from *Jianbian Danfang*)
Sores on the lower leg: Grind head scum and alum evenly, mix with pig bile, and apply externally. (*Shouyu Fang*)
Gan chan wet sores (genital ulcers with dampness): Fill a silkworm cocoon with head scum, seal it with another cocoon, calcine until red, remove fire toxicity, grind, and apply topically. (Yang Shi)
Xiao'er jin chun (tight lips in infants): Apply head scum topically. (*Zhouhou Fang*)
Vegetable poison and dried meat poison: For poisoning from wild vegetables, various dried meats, horse liver, or horse meat. Contain a piece of head scum the size of a jujube pit, swallow the juice; it can revive the near-dead. Taking with plain boiled water is also acceptable. (*Qianjin Fang*)
Poison from dead meat: Take one qian of scum from an old head towel, take with hot water, and induce vomiting.
Dog venom injuring humans: Mix equal parts of head scum and dog skin, burn to ash, and take one cup with water. If the patient has trismus (lockjaw), force-feed the mixture. For severe recurrence of wounds from dog bites: put a small amount of head scum into the wound, and seal it with hot cow dung.
Snake bites: Take a ball of comb scum, mix with urine, and apply topically. Heat the comb until it sweats, then use it to moxa/compress the area. (All from *Qianjin Fang*)
Centipede stings: Mix head scum and powder of Sophora root (Kushen), blend with wine, and apply topically. (*Qie Zhong Fang*)
Wasp/scorpion stings: Seal the area with head scum.
Insect/ant stings: Same as above. (All from *Ji Jian Fang*)
Splinters of bamboo or wood embedded in flesh: Apply head scum; the splinter will emerge. (Liu Juanzi)
Flying silk entering the eye: Take a small amount of white dandruff from the head, rub the eye; the silk will come out. (*Wulei Xianggan Zhi*)
Red eyes with swelling and pain: Insert a mustard-seed-sized amount of head scum into the eye to induce tearing. (*Zhaxuan Fang*)
Belching and vomiting of sour fluid: Decoct a soybean-sized amount of head scum in jiangshui (fermented grain water), take one cup; effective. (*Puji Fang*)