舌胎虽当分颜色。黄为胃火白肺热。惟有黑胎莫相逢。麻症逢之心经绝。
舌者心之苗。心为君火。麻本火候。故舌有胎。胎有黄、白、黑三种。白胎为肺热。黄胎为脾胃
热。均当清解疏利。更兼外症参详而治。如宣毒发表汤（见第五条）去升麻、桔梗、甘草。葛根解肌
汤（见第五条）去赤芍、甘草。葛根疏邪汤（见三十三条）防风败毒散（见第五条）去桔梗、甘草。苏
葛汤（见第六条）去柴胡、赤芍、甘草。俱可随症加减而施。纯黑者。则为心绝。黑而湿者。热淫血
分。黑而燥者。热淫气分。皆为危候。此症无分首尾。均宜清热疏利。一例而治。并宜用白虎解毒
汤（见二十六条）黑而湿者。多用生地黄、元参。燥者。倍用黄连、黄芩、麦冬、淡竹叶。加地骨皮、
木通。黑色渐退者吉。不退者不治。
唇燥火热在胃脾。红赤热重淡白微。若带紫黑而燥者。苦寒之味始相宜。
唇燥、乃脾胃二经之热。其症有三。一则唇淡白而枯燥者。其热尚微。以白虎汤（见二十六条）
去甘草、粳米。加麦冬、木通、牛蒡子治之。一则唇赤而枯燥者。其热极深。以白虎解毒汤
（见二十六条）加元参、牛蒡子、连翘、木通治之。一则唇带紫黑而枯燥者。其热剧而重也。以白
虎解毒汤（见二十六条）加犀角汁、元参、牛蒡子、木通、车前子治之。惟宜随症轻重。以清热分
利。方称良工。
舌苔虽然应当区分颜色，黄色代表胃火，白色代表肺热。唯独出现黑色舌苔最为凶险，麻疹病症中若见黑苔，预示心气绝灭。
舌头是心的外候（苗窍）。心属君火，麻疹本质亦属火邪所致。因此舌上会出现苔垢，苔垢分为黄、白、黑三种。白苔属于肺热，黄苔属于脾胃热，都应当采用清热解表、疏通利导的方法治疗。同时结合外部症状综合参详后施治。例如：宣毒发表汤（参见第五条）去掉升麻、桔梗、甘草；葛根解肌汤（参见第五条）去掉赤芍、甘草；葛根疏邪汤（参见第三十三条）、防风败毒散（参见第五条）去掉桔梗、甘草；苏葛汤（参见第六条）去掉柴胡、赤芍、甘草。这些方剂都可以随症状加减使用。纯黑色的舌苔，则意味着心气已绝。舌苔黑而湿润的，是热邪深入血分；舌苔黑而干燥的，是热邪深入气分。这些都是危重的征象。此症不分病程初期或后期，都适宜清热疏通利导，统一进行治疗。并适宜使用白虎解毒汤（参见第二十六条）。对于黑而湿润者，多用生地黄、玄参；对于干燥者，加倍使用黄连、黄芩、麦冬、淡竹叶，并加入地骨皮、木通。如果黑色逐渐消退为吉兆，若不消退则无法治愈。
嘴唇干燥是因为火热之邪在胃和脾经。唇色红赤表示热重，淡白表示热轻。如果嘴唇呈现紫黑色且干燥，才适宜使用苦寒性质的药物。
嘴唇干燥，是脾胃两经有热的表现。其症状有三种情况。第一种是嘴唇淡白且枯燥，说明热势尚轻微，用白虎汤（参见第二十六条）去掉甘草、粳米，加入麦冬、木通、牛蒡子来治疗。第二种是嘴唇红赤且枯燥，说明热势极深，用白虎解毒汤（参见第二十六条）加入玄参、牛蒡子、连翘、木通来治疗。第三种是嘴唇带紫黑色且枯燥，说明热势剧烈且严重，用白虎解毒汤（参见第二十六条）加入犀角汁、玄参、牛蒡子、木通、车前子来治疗。只适宜根据症状轻重，采用清热分消利导的方法，才能称为良医。
Although tongue coating should be distinguished by color, yellow indicates stomach fire (Wei Huo), and white indicates lung heat (Fei Re). However, the appearance of a black coating is extremely ominous; in measles cases, a black coating signifies the exhaustion of Heart Qi.
The tongue is the sprout of the Heart. The Heart governs Ministerial Fire (Jun Huo), and measles pathology is inherently fire-related. Therefore, coatings appear on the tongue, categorized into three types: yellow, white, and black. A white coating indicates lung heat, while a yellow coating indicates spleen and stomach heat. Both require clearing heat, resolving the exterior, and promoting free flow. Treatment must also be guided by a comprehensive analysis of external symptoms. For instance: Xuan Du Fa Biao Tang (See Clause 5) with Shengma (Cimicifugae Rhizoma), Jiegeng (Platycodonis Radix), and Gancao (Glycyrrhizae Radix et Rhizoma) removed; Gegen Jie Ji Tang (See Clause 5) with Chishao (Paeoniae Radix Rubra) and Gancao removed; Gegen Shu Xie Tang (See Clause 33), Fangfeng Bai Du San (See Clause 5) with Jiegeng and Gancao removed; and Suge Tang (See Clause 6) with Chaihu (Bupleuri Radix), Chishao, and Gancao removed. These formulas may all be modified according to specific symptoms. A purely black coating indicates the exhaustion of Heart Qi. A black coating that is moist suggests heat invading the Blood level (Xue Fen); a black coating that is dry suggests heat invading the Qi level (Qi Fen). Both are critical conditions. Regardless of whether the disease is in its early or late stage, treatment should uniformly focus on clearing heat and promoting free flow. Baibu Jiedu Tang (See Clause 26) is suitable. For moist black coatings, use more Shengdihuang (Rehmanniae Radix) and Yuanshen (Scrophulariae Radix); for dry coatings, double the dosage of Huanglian (Coptidis Rhizoma), Huangqin (Scutellariae Radix), Maidong (Ophiopogonis Radix), and Danzhuye (Lophatheri Herba), adding Digupi (Cortex Lycii Radicis) and Mutong (Akebiae Caulis). If the black color gradually recedes, it is auspicious; if it does not recede, the condition is incurable.
Dry lips indicate fire-heat in the Stomach and Spleen meridians. Redness and chapping indicate severe heat, while pale whiteness indicates mild heat. Only when the lips are purple-black and dry are bitter-cold herbs appropriate.
Lip dryness results from heat in the Stomach and Spleen meridians. There are three presentations. First, pale-white and dry lips indicate mild heat; treat with Baibu Tang (See Clause 26) removing Gancao and Jingmi (Glumi Semen), adding Maidong, Mutong, and Niubangzi (Arctii Fructus). Second, red and dry lips indicate extreme heat depth; treat with Baibu Jiedu Tang (See Clause 26) adding Yuanshen, Niubangzi, Lianqiao (Forsythiae Fructus), and Mutong. Third, purple-black and dry lips indicate severe and intense heat; treat with Baibu Jiedu Tang (See Clause 26) adding Xijiao Zhi (Rhinocerotis Cornu Juice), Yuanshen, Niubangzi, Mutong, and Cheqianzi (Plantaginis Semen). One must only adjust the clearing of heat and promotion of fluid distribution according to the severity of symptoms to be considered a skilled physician.