人气，主下元虚冷，日令童男女，以时隔衣进气脐中，及两腰肾间甚良。凡人身体
骨节痹痛，令人更互呵熨，久久经络通透，盖气属阳，为一身之健运，即真火也。天非
此火不能生物，人非此火不能有生，故老人虚人，与二七以前少阴同寝，藉其熏蒸，最
为有益，下元虚冷，火气衰也。得处人之少火，乃以补其不足，骨节痛痹，血泣不行
也，血不自行，随气而运，故能使骨节通畅也。近时术士，令童女以进气鼻窍、脐中、
精门，以通丹田，谓之接补，此亦小法，不得其道者，反以致疾。
牙齿者，肾之标，骨之余也。味甘咸气热，有小毒，其主除劳治疟者。盖劳乃劳
极，精气乏绝，肾家亏损，疟亦因之而发。牙为肾气所生，以类相从。补还其本，故主
之也。能解蛊毒者，味甘而咸也，治痘疮倒靥乳痈未溃者，以毒攻毒也。
人牙自落者佳，法制研末，热酒调服，能托豌豆陷疮，且除劳治疟，兼解蛊毒，更
托乳痈。人齿 和黑虱共研，出箭头破痈肿可涂。人津沫，取平明之时，润眼目，去
翳障生光，涂肿痈，解热毒即退，回津频咽，敛纳丹田，肺间心清，能降火，任清吐唾，损真元。
按∶津乃精气所化，五更未语之唾，涂肿辄消，拭目去障，咽入丹田，则固精而制
火，修养家咽津，谓之清水灌灵根，人能终日不唾，收视返听，则精气常凝，容颜不
槁。若频唾则损精神，成肺病，仙家以于口水成活字咽津，诚下死之方欤。
主治（痘疹合参） 人牙，用以伐肾经之邪，凡痘黑陷切牙者可用，或云灰白陷者
不可用，宜火 或酒淬，或韭菜汁淬用，止宜一二厘，不宜多服。或有单用，或有加麝
香少许用，然性烈，发表太过，内动中气，外增溃烂，万不得已者投之。
人气，主要治疗下元虚冷（肾阳不足导致的下部寒冷），每日让儿童或少年男女隔着衣服将气吹入肚脐中，以及腰部肾脏部位，效果很好。凡是人体骨骼关节出现痹痛（经络阻滞引起的疼痛麻木），让人互相呵气并熨烫，久而久之经络就会通畅，因为气属于阳，是全身运行的动力，也就是真火（命门之火）。天没有这把火不能化生万物，人没有这把火就不能生存，所以老人和体虚的人，与十四岁以前的少阴之气旺盛者同寝，借助其熏蒸温暖，最为有益，这是因为下元虚冷，火气衰微。得到处于发育期之人的少火（温和的生命之火），是用来补充不足的；骨节疼痛痹阻，是因为血液凝涩不行，血不能自行运行，必须随气而运动，所以能使骨节通畅。近来一些术士，让童女将气吹入鼻孔、肚脐、精窍，以通达丹田，称为接补，这也是小技法，不得要领的人反而会导致疾病。
牙齿，是肾的外在表现，也是骨头的剩余部分。味道甘咸，性质热，有小毒。它主治劳损和治疗疟疾。所谓劳损乃是极度疲劳，精气匮乏断绝，肾脏亏损所致，疟疾也由此引发。牙齿由肾气所生，同类相从。通过补益牙齿来归还根本，所以能主治这些病症。能解蛊毒的原因，在于味甘甜且咸。治疗痘疮倒靥（痘疹内陷）和乳痈未溃破的情况，是以毒攻毒的方法。
人牙自然脱落的效果最好，经过炮制研磨成粉，用热酒调服，能够托举豌豆疮（天花）内陷的疮口，并且能除劳治疟，兼解蛊毒，还能托举乳痈。人齿与黑虱共同研磨，可涂抹于箭头处，排出箭镞，破除痈肿。人的唾液，取清晨平明之时，润湿眼目，去除翳障使眼睛明亮，涂抹于肿痈上，解除热毒随即消退。频繁吞咽津液，收敛纳入丹田，可使肺间心清，能够降火；如果随意吐唾沫，则会损伤真元。
按语：津液乃精气所化，五更时分尚未说话时的唾液，涂抹于肿胀处即刻消退，擦拭眼睛去除障碍，咽入丹田，则能固精并制约火势。修养家吞咽津液，称之为“清水灌灵根”，人若能整天不吐唾沫，收视返听，则精气常凝聚，容颜不枯槁。若频繁吐唾则损伤精神，导致肺病。仙家将口水写成“活”字后吞咽津液，这确实是下等的死方啊。
主治（参考《痘疹合参》）：人牙，用来祛除肾经的邪气，凡是痘疹颜色发黑、内陷且咬牙的患者可以使用。有人说灰白色内陷者不可用。宜用火煅或用酒淬，或用韭菜汁淬后使用，只宜一二厘，不宜多服。或者单用，或者加入少许麝香使用，然而药性猛烈，发表太过，内动中气，外增溃烂，只有在万不得已的情况下才投用。
Ren Qi (Vital Energy), primarily treats Xu Leng of the Lower Yuan (deficiency-cold in the lower origin/kidney yang deficiency). It is recommended to have children or adolescents blow their breath through clothing into the umbilicus and the lumbar kidney region daily, which is very effective. For anyone suffering from Bi pain (painful obstruction) in the body's bones and joints, having people alternate blowing air and warming (ironing with heat) the area can, over time, unblock the meridians. This is because Qi belongs to Yang and serves as the driving force for the entire body, which is also the True Fire (Mingmen Fire). Heaven cannot generate life without this fire, and humans cannot survive without it. Therefore, for the elderly and those with deficiency, sleeping with individuals before the age of fourteen (whose Shaoyin energy is vigorous), benefiting from their steaming warmth, is most advantageous, as it addresses the coldness and weak fire of the Lower Yuan. Receiving the "Lesser Fire" (mild vital fire) of a person in youth serves to supplement insufficiency; bone joint pain and bi obstruction occur due to blood stasis and stagnation. Since blood cannot move on its own but follows Qi, this method facilitates the smooth flow in the joints. Recently, some practitioners have instructed young girls to blow breath into the nasal aperties, umbilicus, and Jing Men (essence gate) to open the Dantian, a practice called "Jie Bu" (Connecting and Supplementing). Although this is a minor technique, those who do not grasp the correct principles may inadvertently cause illness.
Teeth are the external manifestation of the Kidney and the surplus of Bone. Their flavor is sweet and salty, their nature is hot, and they possess slight toxicity. They primarily treat Lao (chronic debility/overwork) and Malaria (Nue). Lao refers to extreme exhaustion where Essence and Qi are depleted due to Kidney deficiency, which also triggers Malaria. Since teeth are generated by Kidney Qi, they follow the principle of similarity. By treating the teeth, one supplements the root, thus addressing these conditions. The ability to resolve Gu Poison (gu poison) stems from their sweet and salty flavor. To treat inverted acne (where pustules fail to erupt) and unruptured breast abscesses, they utilize the principle of "using poison to attack poison."
Naturally shed human teeth are best. After processing and grinding into powder, taken with warm wine, they can raise sunken smallpox lesions, treat chronic debility and malaria, resolve gu poison, and also help raise breast abscesses. Human teeth ground together with black leeches can be applied to arrow wounds to extract the arrowhead and break down carbuncles. Human saliva, collected at dawn, moistens the eyes, removes nebulae to restore vision, and when applied to swollen abscesses, resolves heat-toxins immediately. Frequent swallowing of saliva, gathering it into the Dantian, clears the heart and lungs, descends fire; conversely, spitting out saliva damages the True Yuan (Original Qi).
Commentary: Saliva is transformed from Essence and Qi. The saliva produced during the fifth watch (3-5 AM) before speaking, when applied to swelling, reduces it instantly; wiping the eyes removes obstructions; swallowing it into the Dantian consolidates Essence and controls fire. Cultivators swallow saliva, calling it "Clear Water Irrigating the Spiritual Root." If one refrains from spitting all day, focuses inward (Shou Shi Fan Ting), Essence and Qi remain condensed, and the complexion does not wither. Frequent spitting damages Spirit and leads to Lung disease. Alchemists write the character "Huo" (Alive) with saliva and then swallow, which is indeed a inferior and fatal method.
Main Indications (referencing *Dou Zhen He Can*): Human teeth are used to purge pathogens from the Kidney Meridian. They are suitable for cases where smallpox lesions turn black, sink inward, and involve teeth-grinding. Some claim they should not be used for grayish-white sinking lesions. They should be calcined with fire, quenched in wine, or quenched in chive juice. Only a minute dose (1-2 li) is appropriate; excessive dosage should be avoided. They may be used alone or with a small amount of Moschus (She Xiang). However, the property is fierce; it releases the exterior too aggressively, disturbs the Middle Qi internally, and exacerbates ulceration externally. It should only be administered in desperate situations.