《内经》曰∶小肠者，受盛之官，化物出焉。又云∶小肠为赤肠。
胃之下口，小肠之上口也，在脐上二寸，水谷于是分焉。大肠上口，小肠之下口也。至
是而泌别清浊，水液渗入膀胱，滓秽流入大肠。
手太阳穴一十九，少泽、前谷、后溪薮，腕骨、阳谷、养老绳，支正、小海外辅肘，肩
贞、
耳前珠上走（左右三十八穴）。
此一经起于少泽，终于听宫。取少泽、前谷、后溪、腕骨、阳谷、少海，与井荥俞原经
脉起小指之端，循手外侧上腕，出踝中直上，循臂骨下廉，出肘内侧两骨之间，上循
外后廉，出肩解，绕肩胛，交肩上，入缺盆，络心，循咽下膈抵胃，属小肠；其支者，从
缺盆贯颈上颊，至目锐 ，却入耳中；其支别者，别循颊上 （ 音拙）抵鼻，至目内
也。多血少气，未时气血注此。
丙火之腑，脉详左寸。是经之为病也，面白耳前热，苦寒，肩臂廉内外肿痛。沉诊为心
，实则脉实，烦满而口舌生疮；浮取小肠，虚则脉虚，懊 而唇青下白。颔肿不可转，清痰
降火；腰折难动履，渗湿利热。倘小便数频，乌药益智丸，用酒煮山药；若精气不固，白茯
猪苓和，须蜡化津液。小肠疝气，茴香姜浸入青盐；肾宫精冷，川楝炒成加木破。滑石寒而
能治诸淋，沉香温而能行诸气。尿血煮苦苋菜根，血淋煎车前子叶。清泉旋汲饮发灰，薄荷
时煎调琥珀。热入小肠为赤带，茴香苦楝当归；邪归大腑变膏淋，滑石金砂甘草。尝考牡蛎
石斛补，续随金砂泻。巴戟乌药茴香温，黄芩通草花粉凉。羌活 本引于上，黄柏二苓行于
下，细阅本草之旨，略为理治之阶，毋执己见，妙在言传。
《黄帝内经》说：小肠是负责接受和盛纳的器官，负责将食物转化为精微物质。又说：小肠是红色的肠。
胃的下口，就是小肠的上口，位于肚脐上方两寸处，水谷在此处分离。大肠的上口，是小肠的下口。到了这里，小肠分别清浊，水液渗入膀胱，糟粕流入大肠。
手太阳经有十九个穴位：少泽、前谷、后溪是汇聚之处，腕骨、阳谷、养老如绳索般排列，支正、小海在外侧辅肘部，肩贞在耳前珠上行走（左右共三十八穴）。
这条经脉起于少泽穴，终于听宫穴。取少泽、前谷、后溪、腕骨、阳谷、少海等穴，其井、荥、输、原、经、脉之气起于小指末端，沿手外侧上行至手腕，出于踝中直上，沿臂骨下缘，出肘内侧两骨之间，向上沿外后侧边缘，出肩解，绕肩胛，交会于肩上，进入缺盆，联络心脏，沿咽部下行穿过膈肌到达胃部，归属于小肠；其分支从缺盆贯穿颈部上行至面颊，至目锐眦，折入耳中；另一分支，别行沿面颊上行至颧骨（音拙）抵鼻，至目内眦。此经多血少气，未时气血灌注于此。
这是丙火之腑，脉象详察于左寸。这条经发生病变时，面色苍白，耳前发热，怕冷，肩臂内外侧肿痛。沉取诊得心脉实，则脉象充实，烦闷胀满且口舌生疮；浮取诊得小肠脉虚，则脉象虚弱，心中懊恼且嘴唇发青、大便色白。下颌肿胀不能转动，需清化痰热降火；腰部折断难以活动行走，需渗湿利热。如果小便频数，用乌药益智丸，以酒煮山药服用；若精气不固，用白茯苓和猪苓调和，需用蜡融化津液送服。小肠疝气，用茴香姜浸泡青盐；肾宫精冷，用川楝子炒制加入木破（注：原文疑为木通或类似药材，此处依原文保留“木破”或视为笔误，但按规则保持原名，通常指代温肾散寒之品，此处暂录原文词汇）。滑石性寒能治各种淋证，沉香性温能行各种气机。尿血煮苦苋菜根治疗，血淋煎车前子叶治疗。汲取清泉旋转饮用发灰，薄荷时常煎煮调服琥珀。热邪侵入小肠导致赤带，用茴香、苦楝、当归治疗；邪气归入大肠变为膏淋，用滑石、金砂、甘草治疗。曾经考证牡蛎、石斛具有补益作用，续随子、金砂具有泻下作用。巴戟天、乌药、茴香性温，黄芩、通草、花粉性凉。羌活、藁本引药上行，黄柏、二苓（茯苓、猪苓）行药于下，仔细研读本草的宗旨，略作治疗的阶梯，不要固执己见，妙处在于言传。
The *Huangdi Neijing* (Yellow Emperor's Inner Canon) states: The Small Intestine is the official responsible for receiving and storing, transforming substances. It also says: The Small Intestine is a red intestine.
The lower opening of the Stomach is the upper opening of the Small Intestine, located two cun above the umbilicus, where water and grain are separated here. The upper opening of the Large Intestine is the lower opening of the Small Intestine. Here, clear and turbid substances are separated; fluid seeps into the Bladder, while dregs flow into the Large Intestine.
There are nineteen acupoints on the Hand-Taiyang Meridian: Shaose (SI1), Qiangu (SI2), Houxi (SI3) are gathering points; Wanggu (SI4), Yanggu (SI5), Yanglao (SI6) are arranged like ropes; Zhengzheng (SI7), Xiaohai (SI8) are at the lateral auxiliary elbow; Jianzhen (SI9) walks to above the pearl in front of the ear (totaling thirty-eight acupoints on both sides).
This meridian originates at Shaose (SI1) and terminates at Tinggong (SI19). Selecting Shaose (SI1), Qiangu (SI2), Houxi (SI3), Wanggu (SI4), Yanggu (SI5), Shaohai (HT3)*, the Jing-Well, Ying-Spring, Shu-Stream, Yuan-Source, Jing-River, and He-Sea points originate from the tip of the little finger, follow the lateral aspect of the hand up to the wrist, emerge from the malleolus region straight upwards, follow the lower margin of the arm bone, emerge between the two bones on the medial side of the elbow, ascend along the lateral posterior margin, emerge from the shoulder joint, wind around the scapula, intersect at the shoulder, enter the Supraclavicular Fossa, connect with the Heart, follow the pharynx downwards through the Diaphragm to reach the Stomach, and belong to the Small Intestine; its branch passes from the Supraclavicular Fossa through the neck to the cheek, reaches the outer canthus of the eye, and re-enters the ear; another branch diverges, follows the cheek upwards to the zygomatic area (sound 'zhuo'), reaches the nose, and arrives at the inner canthus of the eye. This meridian has abundant blood and scarce qi; qi and blood pour into it during the Wei hour (1 PM - 3 PM).
It is the Fu organ of Bing Fire; the pulse is detailed at the Left Cun position. When this meridian is diseased, the face is pale, heat is felt before the ears, aversion to cold occurs, and there is swelling and pain on the inner and outer aspects of the shoulder and arm. Deep palpation reveals a full Heart pulse; if excess, the pulse is full, accompanied by vexation, fullness, and sores on the mouth and tongue; superficial palpation reveals a deficient Small Intestine pulse; if deficient, the pulse is empty, accompanied by restlessness and cyanosis of the lips with white stool. Swelling of the jaw that prevents turning requires clearing phlegm and descending fire; a bent waist difficult to move or walk requires draining dampness and promoting heat elimination. If urination is frequent, use Wuyao Yizhi Wan (Aucklandia and Alpinia Oxyphylla Pill), cooked with Yam; if essence and qi are not secure, use Poria and Polyporus combined, requiring wax-melted fluid for administration. For Small Intestine hernia, soak Fennel and Ginger in Green Salt; for Cold Essence in the Kidney Palace, stir-fry Melia Azedarach and add Mupo (Note: likely a textual variant or error, retained as per source). Talcum Stone is cold and can treat various Lin syndromes; Agarwood is warm and can circulate all Qi. Boil Amaranth root for hematuria; decoct Plantago leaf for bloody Lin syndrome. Draw fresh spring water and drink hair ash; decoct Mint frequently and mix with Amber. Heat entering the Small Intestine causes red leukorrhea, treated with Fennel, Melia Azedarach, and Angelica Sinensis; pathogen returning to the Large Intestine changes to Paste Lin syndrome, treated with Talcum Stone, Gold Sand (likely Cinnabar or similar mineral), and Licorice. I have examined that Oyster Shell and Dendrobium tonify, while Euphorbia Lathyris and Gold Sand purge. Morinda Officinalis, Aucklandia, and Fennel are warm; Scutellaria Baicalensis, Akebia Stem, and Trichosanthes Root are cool. Notopterygium Rhizome and Ligusticum Wallichii guide upward; Phellodendron Bark, Poria, and Polyporus act downward. Carefully read the principles of Materia Medica, slightly establish the steps for treatment, do not adhere to personal views, the subtlety lies in verbal transmission.
*(Note: Shaohai HT3 is listed in the text but belongs to the Hand-Shaoyin meridian, likely included here for comparative or specific therapeutic context in the original text.)*