（《拾遗》）
藏器曰∶此是作针家磨 细末也。须真钢砂乃堪用，人多以柔铁砂杂和之，飞为粉，人
莫能辨也。亦堪染皂。
【主治】功同铁粉。和没食子染须，至黑（藏器）。
消积聚肿满黄胆，平肝气，散瘿（时珍）。
【附方】新十。
风湿脚痛∶针砂、川乌头为末，和匀炒热，绵包熨之。（《摘玄方》）
风痹暖手∶针砂四两， 砂三钱，黑脚白矾六钱，研末，以热醋或水拌湿，油纸裹置袋
内，任意执之，冷再拌。（《圣济录》）
脾劳黄病∶针砂四两（醋炒七次），干漆（烧存性）二钱，香附三钱，平胃散五钱，为
末，蒸饼丸梧子大。任汤使下。（《摘玄方》）
湿热黄疮，助脾去湿。针砂丸∶用针砂不拘多少，擂尽锈，淘洗白色，以米醋于铁铫内
浸过一指，炒干，再炒三、五次，候通红取出。用陈粳米半升，水浸一夜，捣粉作块，煮半
熟，杵烂，入针砂二两半，百草霜（炒）一两半，捣千下，丸梧子大。每服五十丸，用五加
皮、
牛膝根、木瓜浸酒下。初服若泄泻，其病源去也。（《乾坤生意》）
水肿尿少∶针砂（醋煮炒干）、猪苓、生地龙各三钱。为末，葱涎研和，敷脐中约一寸
浓，缚之，待小便多为度，日二易之。入甘遂更妙。（《德生堂方》）
泄泻无度，诸药不效∶方同上，不用甘遂。（《医学正传》）
虚寒下痢，肠滑不禁∶针砂七钱半，官桂一钱，枯矾一钱。为末，以凉水调摊脐上下，
缚之。当觉大热，以水润之。可用三、四次，名玉胞肚。（《仁存方》）
项下气瘿∶针砂入水缸中浸之，饮食皆用此水，十日一换砂，半年自消散。（杨仁斋《直
指方》）
染白须发∶针砂（醋炒七次）一两，诃子、白芨各四钱，百药煎六钱，绿矾二钱，为末，
用热醋调刷须发，菜叶包住，次早酸浆洗去。此不坏须，亦不作红。又方∶针砂、荞面各一
两。百药煎为末，茶调，夜涂旦洗。再以诃子五钱，没石子（醋炒）一个，百药煎少许，水
和涂一夜，温浆洗去，黑而且光。
(From *Bencao Shayi* / Supplement to Materia Medica)
Chen Cangqi stated: This is the fine powder ground by needle-makers. Only true steel sand is suitable for use; people often mix it with soft iron sand, flying it into powder, making it indistinguishable to others. It can also be used to dye silk black.
[Indications]
Its efficacy is similar to that of Iron Powder (Tiefen). Mixed with Myrobalan (Moshizi), it dyes hair and beard jet black (Chen Cangqi).
It eliminates accumulations, swelling, fullness, and jaundice; calms Liver Qi; and dissipates goiters (Li Shizhen).
[Prescriptions]
Ten new prescriptions included.
Rheumatic foot pain: Grind Needle Sand (Zhen Sha) and Chuan Wutou (Aconiti Radix Lateralis Preparata) into powder, mix evenly, stir-fry until hot, wrap in cotton cloth, and apply as a hot compress (from *Zhai Xuan Fang*).
Wind-bi causing cold hands: Take four qian of Needle Sand (Zhen Sha), three qian of Sulfur (Liuhuang), and six qian of Black-footed White Alum (Bai Fan), grind into powder. Moisten with hot vinegar or water, wrap in oil paper, place in a bag, and hold in hand at will. Re-moisten when cold (from *Shengji Lu*).
Spleen labor-induced yellow disease: Take four qian of Needle Sand (Zhen Sha) (stir-fried seven times with vinegar), two qian of Dried Lacquer (Ganxi) (burned to retain its nature), three qian of Cyperi Rhizoma (Xiangfu), and five qian of Pingwei San, grind into fine powder. Make pills the size of wu-tong seeds using steamed bread paste. Take with any decoction (from *Zhai Xuan Fang*).
Needle Sand Pill (Zhen Sha Wan) for damp-heat yellow sores, aiding the Spleen and removing dampness: Use an arbitrary amount of Needle Sand (Zhen Sha), grind off all rust, wash until white. Soak in rice vinegar in an iron pot to a depth of one finger, stir-fry until dry, then stir-fry three to five more times until red-hot, then remove. Take half sheng of aged Jingmi (Oryza Sativa Germen), soak in water overnight, pound into powder, form into blocks, cook until half-done, pound until mushy. Add two and a half liang of Needle Sand (Zhen Sha) and one and a half liang of Baicaoshuang (Carbonized Herba Artemisiae Argyi), pound a thousand times, make pills the size of wu-tong seeds. Take fifty pills each time, washed down with wine infused with Acanthopanacis Cortex (Wujia Pi), Achyranthis Bidentatae Radix (Niuxi Gen), and Chaenomelis Fructus (Mugua). If diarrhea occurs upon initial intake, it indicates the source of the disease is being expelled (from *Qiankun Shengyi*).
Edema with oliguria: Take three qian each of Needle Sand (Zhen Sha) (boiled in vinegar and stir-fried dry), Polyporus (Zhuling), and Pheretima (Dishilong). Grind into powder, mix with juice of Allium fistulosum (Congxian) to form a paste, apply to the umbilicus about one cun thick, bind firmly. Continue until urine output increases significantly. Change twice daily. Adding Kansui (Gansui) is even better (from *Desheng Tang Fang*).
Unremitting diarrhea, unresponsive to various medicines: Same prescription as above, but do not use Gansui (from *Yixue Zhengchuan*).
Deficiency-cold dysentery with intestinal slipping and incontinence: Take seven and a half qian of Needle Sand (Zhen Sha), one qian of Guigui (Cinnamomi Ramulus), and one qian of Ku Fan (Alumen). Grind into powder, mix with cool water to spread on and around the umbilicus, bind firmly. One should feel intense heat; if too hot, moisten with water. Can be used three to four times. This method is named "Yu Bao Du" (from *Ren Cun Fang*).
Neck goiter (Qi Ying): Soak Needle Sand (Zhen Sha) in a water vat. Use this water for drinking and cooking. Replace the sand every ten days. It will naturally dissipate after half a year (Yang Renzhai, *Zhizhi Fang*).
Dyeing white hair and beard: Take one liang of Needle Sand (Zhen Sha) (stir-fried seven times with vinegar), four qian each of Hezi and Baiji, six qian of Baiyaojian, and two qian of Lüfan. Grind into powder. Mix with hot vinegar and brush onto hair and beard. Wrap with vegetable leaves. Wash off the next morning with sour liquid. This method does not damage the hair nor turn it red. Another method: Take one liang each of Needle Sand (Zhen Sha) and Qiaomian (Buckwheat Flour). Grind Baiyaojian into powder, mix with tea, apply at night, and wash off in the morning. Then take five qian of Hezi, one Meishi Zi (Arecae Semen) (stir-fried with vinegar), and a small amount of Baiyaojian. Mix with water, apply overnight, and wash off with warm sour liquid. The hair becomes black and shiny.