微苦，辛，凉，无毒。入手足少阳，手阳明、少阴、厥阴。排疮脓，消肿毒，通月经、
治五
淋。散诸经血结气聚，除心肺客热湿热。 瘿瘤之疾，蛊毒白虫之邪。为十二经疮家圣药
。叶茎治心肺积热。
处处有之。有大小二种∶大者生下湿或山冈，青叶狭长如榆叶，茎赤高三四尺，梢间开
黄花
，秋结实似莲，内作房瓣。小者生岗原之上，花叶实皆似大者而细小。
瘰 结核，同芝麻末，时时食之。（验方第一。）
痔疮肿疼，煎熏洗之。（第二。）
咸，寒，无毒。除小儿惊痫，疳热丹毒，疗伤寒发斑头痛，吐血咯血。敷痈疮蛇犬之毒，
解
波斯国蓝靛花也。既不可得，则中国靛花亦可。今所用皆自福建来者。
心口热痛，姜汁下一钱。（验方第一。）
内热吐血，新水下。（第二。）
小儿口疮，青黛、黄柏末掺之。（第三。）
小儿惊痫，水下。（第四。）
小儿夜啼。同上。（第五。）
小儿疳痢，小儿杂病变成疳。不问强弱男女，烦热毛焦，鼻口干燥，皮肤枯槁，四肢瘫
痪，腹中
白色，目赤面黄鼻孔赤，谷道开张。为末服之良效。（第六。）
耳疳出汁，同黄柏末掺之。（第七。）
烂眼皮，同黄连泡汤洗之。（第八。）
产后发狂，同四物汤煎服。（第九。）
伤寒赤斑，水研服。（第十。）
瘰 未破，同马齿苋，常捣敷之。（十一。）
诸毒虫伤，同雄黄新水下。（十二。）
大头瘟，青黛三钱，烧酒一盅，鸡子清一个，合匀服之。（十三。）
味微苦、辛，性凉，无毒。归手少阳三焦经、足少阳胆经、手阳明大肠经、手少阴心经、足厥阴肝经。能排出疮疡脓液，消除肿毒，通调月经，治疗五种淋证（石淋、血淋、膏淋、劳淋、气淋）。消散各经络中的血结与气聚，清除心肺间的客热及湿热。主治瘿瘤（甲状腺肿大等颈部肿块），以及蛊毒和白虫（寄生虫）之邪。是十二经疮疡患者的圣药。其叶和茎可治疗心肺积热。
这种药材到处都有。分为大、小两种：大的生长在低湿处或山冈上，叶子青绿、狭长像榆树叶，茎呈红色，高三四尺，梢头开黄花，秋天结的果实像莲子，内部有房瓣状结构。小的生长在山岗平原之上，花、叶、果实都像大的但体型细小。
【验方一】治疗瘰疬结核（颈部淋巴结结核），与芝麻末混合，经常食用。（验方第一。）
【验方二】治疗痔疮肿痛，煎煮后熏洗患处。（第二。）
味咸，性寒，无毒。能治疗小儿惊风癫痫、疳积发热、丹毒，疗治伤寒发斑、头痛，吐血、咯血。外敷可治痈疮、蛇咬、犬伤之毒。
这是波斯国出产的蓝靛花。如果得不到，中国的靛花也可以。现在所用的都来自福建。
【验方一】心口热痛，用姜汁送服一钱。（验方第一。）
【验方二】内热引起的吐血，用新汲水送服。（第二。）
【验方三】小儿口疮，将青黛和黄柏研成末掺敷患处。（第三。）
【验方四】小儿惊风癫痫，用水送服。（第四。）
【验方五】小儿夜啼。用法同上。（第五。）
【验方六】小儿疳痢。小儿杂病转化为疳证。不分强弱男女，表现为烦热、毛发焦枯、鼻口干燥、皮肤枯槁、四肢瘫痪、腹部白色、眼睛红、面色黄、鼻孔赤、肛门张开。研成末服用效果良好。（第六。）
【验方七】耳疳流脓汁，同黄柏末掺敷。（第七。）
【验方八】烂眼皮，同黄连泡汤清洗。（第八。）
【验方九】产后发狂，同四物汤煎服。（第九。）
【验方十】伤寒赤斑，用水研磨后服用。（第十。）
【验方十一】瘰疬未破溃，同马齿苋一起捣碎外敷。（第十一。）
【验方十二】各种毒虫咬伤，同雄黄用新水送服。（第十二。）
【验方十三】大头瘟（流行性腮腺炎等头面部红肿热痛疾病），青黛三钱，烧酒一盅，鸡蛋清一个，混合均匀服用。（第十三。）
Taste is slightly bitter and pungent, nature is cool, non-toxic. Enters the Hand-Shaoyang (Sanjiao), Foot-Shaoyang (Gallbladder), Hand-Yangming (Large Intestine), Hand-Shaoyin (Heart), and Foot-Jueyin (Liver) meridians. It expels pus from sores, reduces swelling and toxicity, regulates menstruation, and treats the five types of Lin syndrome (Stone Lin, Blood Lin, Paste Lin, Labor Lin, Qi Lin). It dissipates blood stasis and qi stagnation in various meridians, clears exogenous heat and damp-heat from the Heart and Lungs. It treats Yingliu (goiter or neck masses), Gu poison (parasitic toxins), and white worms (intestinal parasites). It is considered the holy medicine for patients with sores and ulcers across the twelve meridians. Its leaves and stems treat accumulated heat in the Heart and Lungs.
This herb grows everywhere. There are two varieties: large and small. The large variety grows in low, wet areas or hillsides; it has green, narrow, elongated leaves resembling elm leaves, red stems three to four chi high, yellow flowers at the tips, and fruit resembling lotus seeds with internal chambers when ripe in autumn. The small variety grows on hilltops and plains; its flowers, leaves, and fruits resemble those of the large variety but are smaller.
[Prescription 1] For Luoli tubercles (scrofula/cervical lymph node tuberculosis), mix with sesame powder and consume frequently. [First Verified Prescription.]
[Prescription 2] For hemorrhoid swelling and pain, decoct and use for fumigation and washing. [Second.]
Taste is salty, nature is cold, non-toxic. It treats pediatric convulsions and epilepsy, Gan heat (malnutrition fever), erysipelas, treats macules and rashes from Shanghan (cold damage) with headache, hematemesis (vomiting blood), and hemoptysis (coughing up blood). Applied externally, it treats toxic sores, snake bites, and dog bites.
This is the indigo flower from Persia. If unavailable, domestic indigo flower may be used. The current supply comes from Fujian.
[Prescription 1] For heat-pain in the heart region, take one qian with ginger juice. [First Verified Prescription.]
[Prescription 2] For hematemesis due to internal heat, take with newly drawn water. [Second.]
[Prescription 3] For pediatric oral thrush, apply a mixture of Qingdai (Indigo Naturalis) and Huangbai (Phellodendri Cortex) powder to the affected area. [Third.]
[Prescription 4] For pediatric convulsions and epilepsy, take with water. [Fourth.]
[Prescription 5] For nocturnal crying in infants. Same method as above. [Fifth.]
[Prescription 6] For pediatric Gan dysentery. When miscellaneous diseases in children transform into Gan syndrome, regardless of strength or gender, presenting with irritability, fever, scorched hair, dry nose and mouth, withered skin, paralysis of limbs, white abdomen, red eyes, sallow face, red nostrils, and open anus, grinding into powder and taking it yields good results. [Sixth.]
[Prescription 7] For Ergan (ear malnutrition) with discharge, apply together with Huangbai powder. [Seventh.]
[Prescription 8] For rotting eyelids, wash with a decoction of Huanglian (Coptidis Rhizoma). [Eighth.]
[Prescription 9] For postpartum mania, decoct and take with Siwu Tang (Four Substances Decoction). [Ninth.]
[Prescription 10] For red macules/rash from Shanghan, grind with water and take. [Tenth.]
[Prescription 11] For unruptured Luoli tubercles, mash together with Machixian (Portulacae Herba) and apply externally regularly. [Eleventh.]
[Prescription 12] For injuries from various poisonous insects, take with Xionghuang (Realgar) and newly drawn water. [Twelfth.]
[Prescription 13] for Datouwen (Big Head Plague/epidemic parotitis), mix three qian of Qingdai (Indigo Naturalis), one zhong of burning wine, and one egg white, blend evenly, and take. [Thirteenth.]