Blue Root Powder is a powdered powder made from finely ground and extracted Chinese herbal medicine, blue root. The root of woad is the root of the plant woad, and the leaf of woad is called big green leaf, which is also a traditional Chinese medicine with the function of clearing away heat, detoxifying and cooling the blood and stopping bleeding. It has the function of clearing away heat and detoxifying, cooling the blood and inducing diuresis, and is often used clinically in the treatment of fever, chills, headache, body fatigue, sore throat, tannin and mumps caused by colds and flu. It can be used alone or in combination with other medicines. For example, it can be used in combination with thorns, mint, and silver flowers to treat colds, fever, chills, and headache. With burdock, shoot dry, maitake, mallow, etc. can be used to treat mouth and tongue sores, sore throat, tonsillitis and so on. With the raw land, gardenia, rhinoceros horn, motherwort, etc. can be used to treat the heat evil into the camp blood caused by rash, fever, dizziness, delirium and so on.