胸者，肺之分野。然少阳胆经受病，亦令胸痛，此邪气初传入里，而未深入于里，故胸
痛也，古方用柴胡汤加枳壳治之。如未应，本方兑小陷胸汤一服，其效如神。又风寒在肺，
胸满痛，气喘，宜用甘桔汤，加理气散风之剂。又饮食填塞者，宜用吐法。其肺痈、肺痿二
证，详见虚劳，兹不赘。
柴胡汤 （见伤寒少阳证。
甘桔汤 （见伤寒咽痛。
伤寒胁痛，属少阳经受邪，用小柴胡汤。杂症胁痛，左为肝气不和，用柴胡疏肝。七
情郁结，用逍遥散。若兼肝火、痰饮、食积、瘀血、随症加药。右为肝移邪于肺，用推气散
凡治实证胁痛，左用枳壳，右用郁金，皆为的剂。然亦有虚寒作痛，得温则散，按之则止
者，又宜温补，不可拘执也。
小柴胡汤 （见伤寒。
治左胁痛。
柴胡 陈皮（各一钱二分） 川芎 赤芍 枳壳（麸炒） 香附（醋炒，各一钱） 甘草（炙，五分）
唇焦口渴，乍痛乍止者，火也，加山栀，黄芩；肝经一条扛起者，食积也，加
青皮、麦芽、山楂；痛有定处而不移，日轻夜重者，瘀血也，加归尾、红花、桃仁、牡丹皮
；干呕，咳引胁下痛者，停饮也，加半夏、茯苓；喜热畏寒，欲得热手按者，寒气也，加肉
桂、吴茱萸。
逍遥散 （见虚劳。
The chest is the domain governed by the Lung. However, disease in the Shaoyang Gallbladder Meridian can also cause chest pain; this occurs when pathogenic factors have just entered the interior but have not yet penetrated deeply, thus resulting in chest pain. Ancient formulas employ Chaihu Tang (Bupleurum Decoction) with Zhiqiao (Fructus Aurantii Immaturus) for treatment. If there is no response, administering one dose of Xiaoxianxiong Tang (Minor Inverted Chest Granule Decoction) added to the original formula yields miraculous efficacy. Furthermore, if Wind-Cold invades the Lung causing chest fullness and pain accompanied by asthma, Ganjie Tang (Licorice and Platycodon Decoction) combined with herbs that regulate Qi and disperse Wind is appropriate. In cases of food stagnation blocking the area, emesis therapy should be used. The two conditions of Lung Abscess (Fei Yong) and Lung Withering (Fei Wei) are detailed in the chapter on Consumption Deficiency Diseases (Xu Lao), so they are not repeated here.
Chaihu Tang (See Shaoyang Syndrome in Cold Damage).
Ganjie Tang (See Sore Throat in Cold Damage).
Chest pain due to Cold Damage belongs to pathogenic invasion of the Shaoyang Meridian and is treated with Xiao Chaihu Tang (Minor Bupleurum Decoction). For miscellaneous diseases causing chest pain, pain on the left side indicates Disharmony of Liver Qi, treated with Chaihu Shugan San (Bupleurum Powder to Soothe the Liver). Emotional depression is treated with Xiaoyao San (Free and Easy Wanderer Powder). If accompanied by Liver Fire, Phlegm-Fluid, Food Stagnation, or Blood Stasis, herbs are added according to symptoms. Pain on the right side indicates the Liver transferring pathogenic factors to the Lung, treated with Tuiqi San (Push Away Qi Powder). In treating excess-type chest pain, Zhiqiao (Fructus Aurantii Immaturus) is used for the left side, and Yujin (Radix Curcumae Longae) for the right side; both are precise remedies. However, pain caused by Deficiency-Cold, which dissipates with warmth and stops upon pressure, requires warming and tonification, and one must not adhere rigidly to other methods.
Xiao Chaihu Tang (See Cold Damage).
For treating left-sided chest pain:
Chaihu (Radix Bupleuri), Chenpi (Pericarpium Citri Reticulatae) (each 1 qian 2 fen), Chuanxiong (Rhizoma Chuanxiong), Chi Shao (Radix Paeoniae Rubra), Zhiqiao (Fructus Aurantii Immaturus, bran-fried), Xiangfu (Rhizoma Cyperi Rotundi, vinegar-fried) (each 1 qian), Gancao (Radix Glycyrrhizae, honey-fried) (5 fen).
If lips are scorched and thirsty, with pain that comes and goes intermittently, it is Fire; add Zhizi (Fructus Gardeniae) and Huangqin (Radix Scutellariae). If a tendon feels raised along the Liver Meridian, it is Food Stagnation; add Qingpi (Pericarpium Citri Reticulatae Viride), Maiya (Fructus Hordei Germinatus), and Shanzha (Fructus Crataegi). If pain is fixed in location and does not move, being lighter during the day and heavier at night, it is Blood Stasis; add Guiwei (Radix Angelicae Sinensis Tail), Honghua (Flos Carthami), Taoren (Semen Persicae), and Mudanpi (Cortex Moutan). If there is dry retching and coughing that draws pain to the hypochondrium, it is Retained Fluids; add Banxia (Rhizoma Pinelliae) and Fuling (Poria). If one prefers heat and fears cold, desiring pressure from warm hands, it is Cold Pathogen; add Rougui (Cortex Cinnamomi) and Wuzhuyu (Fructus Evodiae).
Xiaoyao San (See Consumption Deficiency Diseases).