咸寒，无毒。
《本经》主结热喘逆，胸中病，令人吐。
发明 咸走肾走血。肾病血病患无多食盐，以血得咸则凝也。补肾药用之，不过借为引
导耳。干霍乱及臭毒、头痛、腹痛，多用盐水吐之。《本经》所主结热喘逆者，以咸能下气
，过咸则引涎水聚于膈上而涌之也。好食盐者，人多黑色，耗血之验也。病水肿忌食，以其
走肾助邪水之逆满也。《千金》治妊妇横生逆产先露手足，以盐摩产妇腹并涂儿手足，急以
爪搔之即缩入而正产。又杀蛊毒。凡水蛭、蚯蚓得盐即化为水。毒虫螫者，以盐擦之，其毒
即解。盐之味咸性降，下气最速。治下部 疮，吐胸中痰 ，止心腹卒痛。不可多食，伤肺
喜咳。扁鹊云∶能除一切大风痛，炒热熨之。今人救朱鱼 雷电豪雨欲死，但口微动者，速
将盐少许调水贮鱼于中，时时微动其水即活，鳞尾有损处以盐涂之，即生出。盐为水之精，
专得涵养之力也。今人食豪雨潦水，腹胀，以盐汤探吐即安。其解水毒可知。
一名石盐，俗名青盐，与光明盐同类
咸寒，无毒。
《本经》主明目，目痛，益气，坚筋骨，去毒盅。
发明 戎盐禀至阴之气凝结而成，不经煎炼，生涯 之阴，功专走血入肾，治目中瘀赤
昏涩。《金匮》茯苓戎盐汤治小便不通，取其补肾利膀胱也。又能固齿明目，治目痛；益气
，坚筋骨，一皆补肾之力。《本经》首主明目，目痛，是热淫于内，治以咸寒。又言去毒蛊
者，咸能软坚，蛊毒邪气不能浮长矣。
【食盐】
味咸，性寒，无毒。
《神农本草经》记载：主治体内郁结之热所致的喘息气逆、胸中病证，并能引起呕吐。
【发明】
咸味药物入肾经和血分。患有肾病或血分病变者应少吃食盐，因为血液遇到咸味会凝固。在补肾药中使用食盐，不过是借其作为引经药罢了。对于干霍乱、臭毒、头痛、腹痛等症，多用盐水催吐。《神农本草经》所说的治疗郁结之热导致的喘息气逆，是因为咸味能降气，过量的咸味会引动涎水聚集于膈上从而引发呕吐。喜好食用食盐的人，肤色多偏黑，这是耗伤血液的验证。患水肿病时忌食盐，因为盐走肾经，会助长邪水之气导致腹部胀满。《千金方》治疗孕妇难产、胎儿手脚先露出的情况，用盐涂抹产妇腹部并涂在胎儿手脚上，迅速用手指抓挠，胎儿手脚即缩回而正常分娩。此外，盐还能解蛊毒。凡是水蛭、蚯蚓遇到盐就会化为水。被毒虫叮咬者，用盐擦拭，毒性即刻解除。盐的味道咸，性质沉降，降气速度最快。治疗下部疮疡，吐出胸中痰饮，停止心腹突发疼痛。不可多吃，否则伤肺导致喜欢咳嗽。扁鹊说：盐能祛除一切大风痛，炒热后熨敷患处。现在人们救助朱鱼（一种观赏鱼）在雷电暴雨中濒死，只要嘴巴微动的，迅速将少许盐调水放入鱼中，不时轻微晃动水，鱼就能复活，鳞片尾巴有损伤的地方涂上盐，就能重新长出。盐是水的精华，专门具有涵养滋润的作用。现在人们食用暴雨后的积水导致腹胀，用盐汤探吐即可安宁。由此可知其解除水毒的功效。
【戎盐】
又名石盐，俗名青盐，与光明盐同类。
味咸，性寒，无毒。
《神农本草经》记载：主治明目，眼痛，益气，坚固筋骨，去除毒蛊。
【发明】
戎盐禀受至阴之气凝结而成，不经煎炼，具有深厚的阴气，功效专一于入血分和肾经，治疗眼中瘀血赤红、昏花涩痛。《金匮要略》中的茯苓戎盐汤治疗小便不通，取其补肾利膀胱的作用。又能固齿明目，治疗眼痛；益气，坚固筋骨，这些都是补肾的力量所致。《神农本草经》首先提到明目、眼痛，是因为内有热邪淫溢，需用咸寒之品治疗。又说能去毒蛊，是因为咸味能软坚散结，使得蛊毒邪气无法浮游生长。
[Salt]
Salty, cold in nature, non-toxic.
*Shennong Bencao Jing* records: It primarily treats heat accumulation causing wheezing and counterflow qi, chest pathology, and induces vomiting.
[Invention/Commentary]
The salty flavor enters the Kidney meridian and the Blood level. Patients with Kidney diseases or Blood-level pathologies should consume little salt, as blood coagulates when exposed to salinity. In kidney-tonifying formulas, salt is used merely as a guiding agent. For dry huoluan (acute abdominal disorder), stench-poison, headache, and abdominal pain, salt water is often used to induce vomiting. The *Shennong Bencao Jing*'s mention of treating heat accumulation with wheezing and counterflow qi is because salt can direct Qi downward; excessive salt draws saliva and fluids to accumulate above the diaphragm, thereby inducing vomiting. People who crave salt often have dark complexions, which is evidence of blood consumption. Salt is contraindicated in edema cases, as it travels to the Kidney and aids the rebellious fullness of pathological water. *Qianjin Fang* treats difficult labor where the fetus's hands or feet present first by rubbing salt on the mother's abdomen and coating the fetal limbs; quickly scratching with fingernails causes the limbs to retract for normal delivery. Furthermore, salt neutralizes gu poison (parasitic toxins). Leeches and earthworms dissolve into water upon contact with salt. For insect stings, applying salt resolves the toxicity immediately. Salt is salty in taste and descending in nature, directing Qi downward most rapidly. It treats sores in the lower body, expels phlegm from the chest, and stops sudden heart and abdominal pain. It should not be consumed in excess, as it damages the Lungs, leading to a propensity for coughing. Bian Que stated that it can eliminate all types of wind-induced pain; when heated and applied externally, it soothes the area. Currently, to rescue goldfish dying during thunderstorms and heavy rain, if the mouth moves slightly, placing them in water mixed with a small amount of salt and gently agitating the water revives them; applying salt to damaged scales or tails promotes regrowth. Salt is the essence of water, possessing specific nourishing and moistening powers. When people suffer from abdominal distension after consuming floodwater, drinking salt water and inducing vomiting brings relief, demonstrating its ability to resolve water toxicity.
[Rongyan / Potash Salt]
Also known as Stone Salt, commonly called Green Salt, similar to Guangming Yan (Bright Salt).
Salty, cold in nature, non-toxic.
*Shennong Bencao Jing* records: It brightens the eyes, treats eye pain, benefits Qi, strengthens sinews and bones, and eliminates toxic parasites.
[Invention/Commentary]
Rongyan forms through the condensation of extreme Yin Qi without refining, retaining profound Yin properties. Its efficacy specializes in entering the Blood level and Kidney meridian, treating eye conditions characterized by stasis, redness, blurriness, and astringency. *Jingui Yaolue*'s Fuling Rongyan Tang treats urinary obstruction, utilizing its ability to tonify the Kidney and benefit the Bladder. It also strengthens teeth, brightens eyes, treats eye pain, benefits Qi, and strengthens sinews and bones, all deriving from its Kidney-tonifying power. The *Shennong Bencao Jing*'s primary indication for brightening eyes and treating eye pain addresses internal heat hyperactivity, treated with salty-cold substances. The mention of eliminating gu poison arises because salt softens hardness, preventing toxic parasitic pathogens from floating and growing.