治少阴中寒，手足厥冷，下利清谷，脉沉细，但欲寐。
附子（五钱） 干姜（五钱） 甘草（炙，二钱
水煎服。如面赤，加葱白二茎；腹痛，加白芍药二钱（酒炒）；呕者，加生姜二钱；咽痛
加桔梗一钱；利止脉不出，加人参二钱；小便不利，身重疼痛，或咳，此为有水气，去干
姜，加白术、茯苓二钱五分，生姜三片。
治少阴中寒，阴盛隔阳，热药相拒不入，故加寒味，以立从治之法。
附子（五钱） 干姜（五钱） 葱白（二茎） 人尿（半杯） 猪胆汁（五茶匙
水煎服。
虚者，加人参三钱。
人参（三钱） 白术 白茯苓 干姜（各一钱五分） 川椒（十粒） 乌梅（二个）
上作一服，水二钟，煎七分服。
凡治蛔，不可用甘草，及甜物。盖蛔得甘则动，得苦则安，得酸则静故也。如未止，加
黄连、黄柏各三分，川椒倍之。若足冷，加附子五、七分，甚者倍之。
问曰∶腹中冷痛，何以属直中寒证？答曰∶寒气内攻，腹中骤然暴痛，手足口鼻俱冷，
或腹中寒冷，欲得热物熨之，不比传经腹痛，由渐而至也。且寒痛绵绵不止，热痛时作时止
也。
问曰∶呕吐清涎沫，何以是直中寒证？答曰∶胃腑寒热之气，必见于涎沫，经曰诸水浑
浊，皆属于热，诸病水液，澄彻清冷，皆属于寒。今见呕吐清涎沫，故知为直中寒证。
Treat Shaoyin disease (disease of the Kidney meridian) caused by direct invasion of cold pathogen, characterized by coldness and reversal in the hands and feet, diarrhea with undigested food in the stool, a deep and fine pulse, and a desire to sleep with little energy.
Fuzi (Aconiti Lateralis Radix Praeparata, 5 qian) Ganjiang (Zingiberis Rhizoma, 5 qian) Gancao (Glycyrrhizae Radix et Rhizoma, honey-fried, 2 qian)
Decoct in water and take orally. If there is facial flushing, add Congbai (Allii Fistulosi Bulbus, 2 stems); if there is abdominal pain, add Baishao (Paeoniae Radix Alba, wine-fried, 2 qian); if there is vomiting, add Shengjiang (Zingiberis Rhizoma Recens, 2 qian); if there is sore throat, add Jiegeng (Platycodonis Radix, 1 qian); if diarrhea stops but the pulse does not emerge, add Renshen (Ginseng Radix, 2 qian); if there is difficulty in urination, heaviness of the body, pain, or coughing, this indicates the presence of fluid retention; remove Ganjiang, add Baizhu (Atractylodis Macrocephalae Rhizoma) and Fuling (Poria, 2.5 qian each), and Shengjiang (3 slices).
Treat Shaoyin disease caused by cold pathogen, where excessive Yin cold repels Yang, causing heat-inducing medicines to be rejected and unable to enter the body; therefore, cold-natured ingredients are added to establish the method of "following treatment" (treating according to the apparent false symptoms).
Fuzi (Aconiti Lateralis Radix Praeparata, 5 qian) Ganjiang (Zingiberis Rhizoma, 5 qian) Congbai (Allii Fistulosi Bulbus, 2 stems) Reniao (Urine of Human, half cup) Zhudanhui (Bilis Porci, five tea spoons)
Decoct in water and take orally.
For those with deficiency, add Renshen (Ginseng Radix, 3 qian).
Renshen (Ginseng Radix, 3 qian) Baizhu (Atractylodis Macrocephalae Rhizoma) Fuling (Poria) Ganjiang (Zingiberis Rhizoma) (each 1.5 qian) Chuanjiao (Zanthoxyli Pericarpium, 10 grains) Wumei (Mume Fructus, 2 pieces)
Combine these as one dose, use two bowls of water, decoct until seven-tenths remain, and take.
When treating ascariasis (roundworm infection), avoid using Gancao (Glycyrrhizae Radix et Rhizoma) and sweet substances. This is because roundworms become active when exposed to sweetness, calm down when exposed to bitterness, and become quiet when exposed to acidity. If symptoms do not cease, add Huanglian (Coptidis Rhizoma) and Huangbai (Phellodendri Cortex, each 0.3 qian), and double the amount of Chuanjiao. If the feet are cold, add Fuzi (Aconiti Lateralis Radix Praeparata, 0.5-0.7 qian), doubling the dose for severe cases.
Question: Why is cold pain in the abdomen classified as a syndrome of direct invasion by cold? Answer: When cold pathogen attacks internally, sudden and violent abdominal pain occurs, accompanied by coldness in the hands, feet, mouth, and nose, or a sensation of cold in the abdomen that desires warming with hot objects. This differs from abdominal pain resulting from transmission through meridians, which develops gradually. Furthermore, cold pain is continuous and lingering, whereas heat pain comes and goes intermittently.
Question: Why is vomiting of clear saliva considered a syndrome of direct invasion by cold? Answer: The cold and heat conditions of the Stomach manifest in saliva. As stated in the classics: turbid fluids belong to heat; clear, transparent, and cold fluids belong to cold. Since clear saliva is vomited here, it is known to be a syndrome of direct invasion by cold.