（《本经》中品）
【释名】铁花。
弘景曰∶铁精，铁之精华也。出 灶中，如尘紫色，轻为佳，亦以磨莹铜器用之。
【气味】平，微温。
【主治】明目，化铜（《本经》）。疗惊悸，定心气，小儿风痫，阴溃脱肛（《别录》）。
【发明】见铁落。
【附方】旧五，新一。
下痢脱肛∶铁精粉敷之。（《至宝方》）
女人阴脱∶铁精、羊脂，布裹炙热，熨推之。（《圣惠方》）
男子阴肿∶铁精粉敷之。（《子母秘录》）
疔肿拔根∶铁渣一两，轻粉一钱，麝香少许，为末。针画十字口，点药入内，醋调面糊
敷之，神效。（《普济方》）
食中有蛊，腹内坚痛，面目青黄，淋露骨立，病变无常。用炉中铁精研末，鸡肝和丸梧
子大。食前酒下五丸，不过十日愈。（《肘后》）
蛇骨刺人毒痛∶铁精粉豆许，吹入疮内。（《肘后方》）
（宋《开宝》）
【释名】铁胤粉（《日华》）、铁艳粉、铁霜。
【修治】志曰∶作铁华粉法∶取钢 作叶，如笏或团，平面磨错，令光净，以盐水洒之，
于醋瓮中，阴处埋之，一百日铁上衣生，即成粉矣。刮取细捣筛，入乳钵研如面，和合诸药
为丸散，此铁之精华，功用强于铁粉也。
大明曰∶悬于酱瓿上生霜者，名铁胤粉。淘去粗滓咸味，烘干用。
【气味】咸，平，无毒。
【主治】安心神，坚骨髓，强志力，除风邪，养血气，延年变白，去百病，随所冷热，
和诸药用，枣膏为丸（《开宝》）。止惊悸虚痫，镇五脏，去邪气，治健忘，冷气心痛， 癖
症结，脱肛痔 ，宿食等，及敷竹木刺入肉（大明）。
【发明】见铁落。
【附方】新一。
妇人阴挺∶铁胤粉一钱，龙脑半钱，研，水调刷产门。（危氏《得效方》）
(From *Shennong Bencao Jing*, Middle Grade)
[Names] Tiehua (Iron Flower).
Ta Hongjing stated: Tiejing (Iron Essence) is the essence of iron. It originates from the furnace, appearing like dust with a purple hue; lightness is preferred, and it is also used for polishing copper vessels.
[Flavor and Properties] Neutral, slightly warm.
[Indications] Brightens the eyes, dissolves copper (*Shennong Bencao Jing*). Treats palpitations and anxiety, stabilizes Heart Qi, pediatric wind-epilepsy, vaginal prolapse with ulceration, and rectal prolapse (*Mingyi Bielu*).
[Elucidation] See entry for Tielluo (Iron Scale).
[Prescriptions] Five old prescriptions, one new prescription.
Dysentery with rectal prolapse: Apply Tiejing powder externally to the affected area. (*Zhibao Fang*)
Female genital prolapse: Use Tiejing and sheep fat, wrapped in cloth, heated, then applied as a hot compress while pushing back into position. (*Shenghui Fang*)
Male scrotal swelling: Apply Tiejing powder externally. (*Zimu Milu*)
Removing the root of carbuncles: One liang of iron slag, one qian of calomel, and a small amount of musk, ground into fine powder. Prick the wound in a cross shape, apply the medicine inside, and cover with a paste made of vinegar and flour. This yields miraculous effects. (*Puji Fang*)
Gastrointestinal parasite poisoning causing hardness and pain in the abdomen, greenish-yellow complexion, emaciation, and unpredictable changes in condition: Grind iron essence from the furnace into powder, mix with chicken liver to make pills the size of wutong seeds. Take five pills with wine before meals; recovery occurs within ten days. (*Zhouhou Beiji Fang*)
Toxic pain from snake bone splinters penetrating the skin: Blow a bean-sized amount of Tiejing powder into the wound. (*Zhouhou Fang*)
(From Song Dynasty *Kaibao Bencao*)
[Names] Tieyin Fen (Iron Yin Powder) (*Rihua Bencao*), Tieyan Fen (Iron Glow Powder), Tieshuang (Iron Frost).
[Preparation] Su Song stated: The method for making Tiehuafen (Iron Blossom Powder): Take steel, shape it into leaves or discs resembling a tablet or ball, polish the flat surface until smooth and clean, sprinkle with salt water, and bury it in a vinegar jar in a shady place for one hundred days. Rust will grow on the surface of the iron, forming powder. Scrape it off, grind finely, sieve, and pulverize in a mortar until it resembles flour. Mix with other herbs to form pills or powders. This is the essence of iron, and its efficacy is stronger than that of Tiefen (Iron Powder).
Kou Zongshi stated: Iron frost grown by hanging over a sauce jar is named Tieyin Fen. Wash away coarse impurities and salty taste, dry, and use.
[Flavor and Properties] Salty, neutral, non-toxic.
[Indications] Calms the Spirit, strengthens bone marrow, enhances willpower and physical strength, dispels wind-pathogens, nourishes blood and Qi, prolongs life, turns hair white, cures various diseases. According to the cold or heat nature of the condition, combine with other herbs and form pills using jujube paste (*Kaibao Bencao*). Stops palpitations and deficiency-type epilepsy, settles the Five Zang organs, expels evil Qi, treats forgetfulness, cold-induced heart pain, fixed masses, rectal prolapse, hemorrhoids, retained food, etc., and is also applied externally for bamboo or wood splinters embedded in flesh (Kou Zongshi).
[Elucidation] See entry for Tielluo (Iron Scale).
[Prescriptions] One new prescription.
Uterine prolapse in women: One qian of Tieyin Fen, half a qian of borneol, ground together, mixed with water, and applied to the vaginal opening. (Wei Yilin, *Defang*)