As far as Chinese medicine is concerned, there is no problem of side effects, because each medicine has its own characteristics, and improper use will cause harm to the body, so it is said that the medicine is toxic in three ways. A good doctor can have a deep understanding of the role of drugs and the patient's condition, and can choose appropriate drugs to maximize the positive role of drugs and avoid damage to the body. Agrimonia pilosa is not suitable for the treatment of exogenous exterior syndrome.