足少阴肾经、为人身之根蒂，其脉始于左足内踝足心，上行贯脊，循喉咙，络舌本，散舌下，注心中，行
身之前。若一二日无热恶寒，足冷蜷卧，或厥逆，脉沈无力者，宜温经散寒。若五六日而发，口燥舌干，
脉沈有力者，此传经之热邪也，急宜下之。大抵少阴伤寒，多因劳欲损伤肾经而致，切不可妄投凉
药。若脉沈足冷，虽发热，急宜温肾以扶元气。经曰、少阴病始得之，其脉沈，其症反热，此少阴自受风
寒以起病，当汗之。若一日、则用麻黄附子细辛汤，二日则用麻黄附子甘草汤，切要记其日子用药。
若三日后，不可妄汗也。经曰、误发少阴汗者，必动阴血，死不治。少阴病不问利不利，当分寒热而治。
若脉沈实有力，此热也，当下之。若脉沈弱无力，此寒也，宜温之。然寒热二症皆令有厥，以阳热内附，
致手足冷也，阴寒独胜，亦手足冷也。然寒症亦有渴者，以少阴主水，肾虚水燥而渴，欲引水自救，故
少阴虚寒亦有渴症也。
足厥阴肝经，厥者尽也，六经之尾也，其脉始于右足大指，环阴器，抵少腹，循?肋，上唇口，与督脉会
于巅顶，行身前之侧。若本经不足，寒邪直入，一二日便发，吐利少腹疼，脉沈无力，无热恶寒，甚则唇
青厥冷，呕吐涎沫，舌卷囊缩，此直中厥阴之寒症，急温之。又曰、脉沈有力，饮水不止，此热也，是即传
经之热症，急下之。微细无力，或沈伏不见，此寒也，急温之。然寒热二症皆有舌卷囊缩，以热主煎迫，
寒主收引也，须仔细辨之。
足少阴肾经，是人身体的根本根基。其经脉起始于左脚内踝下方的足心，向上贯穿脊柱，沿着喉咙，联络舌根，散布在舌下，注入心中，行走在身体前部。如果发病一两天，没有发热却怕冷，脚冷且蜷缩卧倒，或者出现四肢厥逆，脉象沉而无力，适宜采用温通经络、驱散寒邪的方法。如果发病五到六天，出现口燥舌干，脉象沉而有力，这是传经而来的热邪，应当紧急使用攻下法。大抵少阴伤寒，多是因为劳累和房事损伤了肾经所致，切不可胡乱投用寒凉药物。如果脉象沉、脚冷，即使有发热，也应当紧急温补肾阳以扶持元气。医经说：少阴病刚开始时，脉象沉，症状反而发热，这是少阴经直接感受风寒而起的病，应当用发汗法治疗。如果是一天，就用麻黄附子细辛汤；如果是两天，就用麻黄附子甘草汤，务必记住根据发病天数来用药。如果过了三天，就不可以妄用发汗法。医经说：误用发汗法治疗少阴病的，必定会扰动阴血，导致死亡且无法救治。少阴病不论是否有腹泻，都应当区分寒证和热证来治疗。如果脉象沉实有力，这是热证，应当用攻下法。如果脉象沉弱无力，这是寒证，应当用温补法。然而寒证和热证都会导致四肢厥冷，因为阳热内伏，会导致手脚冷；阴寒独盛，也会导致手脚冷。然而寒证中也有口渴的，因为少阴主水，肾虚导致水液干燥而口渴，想要饮水来自救，所以少阴虚寒证也会有口渴的症状。
足厥阴肝经，“厥”意为尽头，是六经的末端。其经脉起始于右脚大拇指，环绕生殖器，抵达小腹，沿着胁肋，上行至唇口，与督脉交会于头顶，行走在身体前部的侧面。如果本经正气不足，寒邪直中入里，一两天就发作，出现呕吐、腹泻、小腹痛，脉象沉而无力，无发热但怕冷，严重时嘴唇发青、四肢厥冷，呕吐涎沫，舌头卷曲、睾丸收缩，这是直中厥阴的寒证，应当紧急温补。又说：如果脉象沉而有力，喝水不止，这是热证，也就是传经的热症，应当紧急攻下。如果脉象微细无力，或者沉伏摸不到，这是寒证，应当紧急温补。然而寒证和热证都会有舌头卷曲、睾丸收缩的表现，因为热邪主要起煎熬逼迫作用，寒邪主要起收引作用，必须仔细辨别。
The Foot-Shaoyin Kidney Meridian is the root and foundation of the human body. Its vessel originates at the center of the sole (Yongquan, KI1) below the medial malleolus of the left foot, ascends through the spine, follows the throat, connects with the root of the tongue, scatters under the tongue, enters the heart, and runs along the anterior aspect of the body. If, within one or two days, there is aversion to cold without fever, cold feet with a curled-up posture, or extremity reversal (Jue Ni), and the pulse is deep and forceless, warming the meridians and dispersing cold is indicated. If it manifests after five or six days, accompanied by dry mouth and tongue, and a deep yet forceful pulse, this indicates heat pathogens transmitted from other meridians, requiring urgent purgation. Generally, Shaoyin Cold Damage often results from damage to the Kidney meridian due to overwork or sexual excess; one must never recklessly administer cooling medicines. If the pulse is deep and feet are cold, even if fever is present, urgent warming of the Kidney to support Yuan Qi (Primordial Qi) is required. The Classics state: "When Shaoyin disease first occurs, the pulse is deep, and symptoms manifest as fever." This indicates the disease originated from direct exposure to wind-cold in the Shaoyin meridian, warranting diaphoresis. On the first day, Mahuang Fuzi Xixin Tang (Ephedra, Aconite, and Asarum Decoction) should be used; on the second day, Mahuang Fuzi Gancao Tang (Ephedra, Aconite, and Licorice Decoction). It is crucial to remember to prescribe based on the number of days since onset. After three days, reckless diaphoresis is contraindicated. The Classics warn: "Mistakenly inducing sweat in Shaoyin disease will disturb Yin blood, leading to death which cannot be cured." Regardless of whether there is diarrhea, Shaoyin disease must be treated by distinguishing between cold and heat patterns. If the pulse is deep, solid, and forceful, it is a heat pattern, requiring purgation. If the pulse is deep, weak, and forceless, it is a cold pattern, requiring warming. Both cold and heat patterns can cause extremity reversal (Jue); internal attachment of Yang heat causes cold hands and feet, while excessive Yin cold also causes cold hands and feet. However, cold patterns may also involve thirst because Shaoyin governs water; Kidney deficiency leads to dryness of water, causing thirst as the body seeks to save itself with water. Thus, Shaoyin deficiency-cold patterns can also present with thirst.
The Foot-Jueyin Liver Meridian: "Jue" means end; it is the terminal of the Six Meridians. Its vessel originates at the tip of the right great toe, circles the genitalia, reaches the lower abdomen, follows the costal region, ascends to the lips and mouth, intersects with the Du Mai (Governing Vessel) at the vertex, and runs along the lateral aspect of the anterior body. If the meridian's Qi is deficient and cold pathogens strike directly, symptoms may appear within one or two days, including vomiting, diarrhea, lower abdominal pain, a deep and forceless pulse, aversion to cold without fever, and in severe cases, cyanotic lips, extremity reversal, vomiting of saliva/phlegm, curled tongue, and retracted testicles. This is a cold pattern striking directly into Jueyin, requiring urgent warming. Furthermore, if the pulse is deep and forceful with incessant drinking, it is a heat pattern, specifically heat transmitted from other meridians, requiring urgent purgation. If the pulse is faint, thin, and forceless, or deep and hidden/unpalpable, it is a cold pattern, requiring urgent warming. Both cold and heat patterns can present with a curled tongue and retracted testicles; heat primarily causes scorching and pressure, while cold primarily causes contraction and pulling. Careful differentiation is necessary.