Do you have blue leaves? use

Used for fever, high fever, headache and macula. Isatis indigotica leaves taste bitter, salty and cold, and are good at clearing heat, cooling blood and detoxifying. It is an important drug for treating fever, high fever, headache and macula. It can be used alone or combined with honeysuckle, forsythia suspensa and Isatis indigotica to enhance the effect of clearing heat, cooling blood and detoxifying. Used for cough due to lung heat. Banlan leaves taste bitter and cold, and can clear lung heat, so it is often used with Fritillaria for cough due to lung heat. Mulberry bark, almond and other drugs to enhance the efficacy of clearing lung-heat and relieving cough. Used for damp-heat diarrhea and damp-heat jaundice. Folium Isatidis not only clears away heat and detoxifies, but also cools blood and promotes diuresis. This product is commonly used in folk treatment of damp-heat diarrhea and jaundice, but it is also commonly used in clinic. For damp-heat diarrhea, drugs such as Coptis chinensis, Cortex Fraxini and Cortex Phellodendri are commonly used to clear away heat and detoxify and diarrhea. Damp-heat jaundice is commonly treated with herbs such as Herba Artemisiae Scopariae, Rhizoma Polygoni Cuspidati and Herba Lysimachiae. Used for erysipelas, scarlet fever and measles. Folium Isatidis not only clears away heat and detoxifies, but also cools and disperses blood, which is a good product for treating blood heat and toxic excess. For erysipelas and scarlet fever, it is only used for mild symptoms, and it is often used with Arnebia euchroma, Radix Paeoniae Rubra, Flos Lonicerae and other drugs in severe cases to enhance the power of clearing blood and removing heat. For measles, it is often combined with Schizonepeta Spike, Arctium lappa and Cicada. To dispel wind and clear heat, detoxify and penetrate rash. Used for treating internal and external sores and carbuncles. Isatis indigotica leaves are good at clearing heat, cooling blood and detoxifying, and can disperse blood and reduce swelling. No matter where it was born, it is used in Xian Yi. For example, sore throat is often combined with honeysuckle, platycodon grandiflorum and raw licorice. For mumps and lymphadenitis, it is often combined with Prunella vulgaris, Forsythia suspensa and Scrophularia. For liver carbuncle and yang carbuncle, it is often combined with Patrinia herb, Sargentodoxa vine and rhubarb. For sore, furuncle and carbuncle, it is often used with Dandelion, Viola yedoensis and Andrographis paniculata. Can receive the effects of detoxification, detumescence and sore treatment. It is used for bleeding due to blood heat. Folium Isatidis can cool blood and stop bleeding, and can treat hematemesis, epistaxis, gingival bleeding and metrorrhagia due to blood heat. It is often combined with herbs such as Radix Rehmanniae, Lalang Grass Rhizome and Platycladus orientalis to enhance the effect of clearing heat, cooling blood and stopping bleeding. In addition, Banlangen liquid is commonly used to treat snake bites, either alone or in combination with Lobelia chinensis and Hedyotis diffusa, so as to strengthen the efficacy of clearing away heat and toxic materials.