Drinking Banlangen has the ability to treat the symptoms of warm epidemics, fever and sore throat, warm toxins and spots (warm and hot toxins invade the human body resulting in spots and plaques on the skin), mumps and other illnesses. The downside is that it may aggravate the condition if taken by people who have a weak body but no real fire or heat poison. Blue Root, also known as Indigo Root, Indigo Root, etc., bitter flavor, cold in nature. It belongs to the heart and stomach meridians. It has the effect of clearing heat and removing toxins (removing heat and toxicity from the body), cooling the blood and relieving the pharynx. It is used for plague, fever and sore throat, warm poisonous spots, mumps, rotting throat and cholera, big head plague, tannin (acute infectious disease, visible skin red like paint), carbuncle, etc. However, it is important to note that the effect of a single Chinese medicine is not only to clear away heat and poison, but also to cool the blood and throat. However, it is important to note that the effect of a single Chinese medicine is weak, and other medicines can be combined with other medicines under the guidance of a TCM doctor to achieve the best therapeutic effect. If there is a need for medication, it should be used under the guidance of a doctor, and should not be used blindly by oneself, so as to avoid adverse consequences.