《时习》云∶疗寒热头疼，温气。童男子者，尤良。
《衍义》云∶人尿，须用童男者，产后温一杯，压下败血恶物。久服，令人反虚。气血
无热，尤不可多服。此亦性寒，故治热劳方中亦用也。
《日华子》云∶小便，凉。止劳渴嗽，润心肺，疗血闷热狂，扑损瘀血，运绝，及蛇犬
等咬，以热尿淋患处。难产胞衣不下，即取一升，用姜、葱煎，乘热饮，即下。
气微寒，味咸，平。无毒。
入足少阴经。
《象》云∶治伤寒寒热温疟，女子带下赤白，止汗，止心痛气结。涩大小肠，治心胁
痞。烧，白研，细用。
《珍》云∶能软积气之痞。《经》曰∶咸能软坚。
《心》云∶咸，平。熬，泄水气。
《本草》云∶主伤寒寒热，温疟洒洒，惊恚怒气。除拘缓，鼠 ，女子带下赤白。除留
热在关节，荣卫虚热，往来不定，烦满。止汗，心痛气结。止渴，除老血。涩大小肠，止大
小便。疗泄精，喉痹咳嗽，心胁下痞热。能去瘰 ，一切疮肿。入足少阴。咸为软坚之剂，
以柴胡引之，故能去胁下之硬；以茶引之，能消结核；以大黄引之，能除股间肿；地黄为之
使，能益精收涩，止小便，本肾经之药也。久服，强骨节，杀鬼延年。贝母为之使。得甘
草、牛膝、远志、蛇床子，良。恶麻黄、吴茱萸、辛夷。
《药性论》云∶君主之剂。治女子崩中，止血及盗汗，除风热，定痛。治温疟。又和杜
仲服，止盗汗。为末蜜丸，服三十丸，令人面光白，永不值时气。又治鬼交精出，病患虚而
多热，加用之，并地黄、小草。
陈士良云∶牡蛎捣粉粉身，治大人小儿盗汗。和麻黄根、蛇床子、干姜为粉，粉身
，去阴汗。《衍义》意同。
*Shi Xi* records: It treats alternating chills and fever, headache, and warm qi disorders. Urine from a prepubescent boy is particularly effective.
*Yan Yi* records: Human urine must be collected from a prepubescent boy; after childbirth, drinking one cup can expel lochia and other foul matter. Long-term consumption may lead to deficiency. If there is no heat in the qi and blood, it should especially not be taken in excess. This is because its nature is cold, so it is also used in formulas treating consumptive fever (lao re).
*Ri Hua Zi* records: Urine is cool in nature. It stops thirst and cough due to consumption, moistens the lungs and heart, treats mania caused by blood-heat, traumatic blood stasis, sudden collapse of vital energy, and bites from snakes or dogs. For these conditions, hot urine should be poured over the affected area. For difficult labor with retained placenta, take one sheng of urine, decoct it with ginger and scallion, and drink it while hot; the placenta will then be expelled.
[Oyster Shell] has a slightly cold qi, salty flavor, and neutral nature. It is non-toxic.
It enters the Foot-Shaoyin Kidney Meridian.
*Xiang* records: It treats alternating chills and fever in Shanghan (cold damage) and Wen Nue (warm malaria), leukorrhea (red and white discharge) in women, stops sweating, and alleviates heart pain and qi stagnation. It astringes the Large Intestine and Small Intestine, and treats epigastric and hypochondriac fullness. When calcined and ground into a fine white powder, it is used externally or internally.
*Zhen* records: It can soften masses formed by stagnant qi. The *Neijing* states: "Salty flavors can soften hardness."
*Xin* records: Salty in flavor, neutral in nature. When roasted, it drains damp-water qi.
*Ben Cao* records: It primarily treats alternating chills and fever in Shanghan, the shivering of Wen Nue, and emotions of fright and anger. It relieves spasms and flaccidity, treats Shu Lou (scrofula/lymphatic tuberculosis), and leukorrhea in women. It clears residual heat in the joints, deficiency heat of Ying and Wei causing alternating chills and fever, restlessness, and fullness. It stops sweating, alleviates heart pain and qi stagnation, quenches thirst, and removes old blood. It astringes the intestines, stopping diarrhea and urinary incontinence. It treats spermatorrhea, bi-syndrome of the throat, cough, and heat-fullness in the chest and hypochondrium. It eliminates Luo Li (scrofula) and all types of sores and swellings. It enters the Foot-Shaoyin Meridian. Salty substances are agents that soften hardness. Guided by Chai Hu (Bupleuri Radix), it can remove hardness in the hypochondrium; guided by tea, it can dissipate tubercles; guided by Da Huang (Rhei Radix et Rhizoma), it can eliminate swelling in the groin; with Di Huang (Rehmanniae Radix) as an assistant, it benefits essence, promotes astringency, stops urination, and acts specifically on the Kidney meridian. Long-term use strengthens bone joints, dispels evil spirits, and prolongs life. Bei Mu (Fritillariae Bulbus) serves as an assistant. It works well when combined with Gan Cao (Glycyrrhizae Radix), Niu Xi (Achyranthis Bidentatae Radix), Yuan Zhi (Polygalae Radix), and She Chuang Zi (Cnidii Fructus). It is incompatible with Ma Huang (Ephedrae Herba), Wu Zhu Yu (Evodiae Fructus), and Xin Yi (Magnoliae Flos).
*Yao Xing Lun* records: It serves as a sovereign drug. It treats metrorrhagia in women, stops bleeding and night sweats, clears wind-heat, and stabilizes pain. It treats Wen Nue. When taken together with Du Zhong (Eucommiae Cortex), it stops night sweats. Made into pills with honey, taking thirty pills per dose makes the complexion bright and white, preventing infection by seasonal epidemic pathogens. It also treats nocturnal emission ("ghost intercourse") and loss of essence; for patients who are deficient and have excessive heat, it is added, along with Di Huang (Rehmanniae Radix) and Xiao Cao (Lithospermi Semen).
Chen Shiliang records: Crushing Oyster Shell into powder and applying it to the body treats night sweats in adults and children. Mixed with Ma Huang Gen (Ephedrae Caulis), She Chuang Zi (Cnidii Fructus), and Gan Jiang (Zingiberis Rhizoma) into a powder and applied to the body, it removes sweating in the genital region. The meaning of *Yan Yi* is consistent with this.