Lianxiao, as a traditional Chinese medicine, is mainly used for clearing heat and detoxifying toxins, dispersing carbuncles and dispersing wind-heat, and is clinically used in the treatment of various diseases, such as respiratory medicine, where it can be used for upper respiratory tract infections. There is a famous formula called Yin Qiao San, in which Lian Qiao is one of the main drugs. In dermatology, it is mainly used for the first two effects, i.e. clearing heat, detoxifying and dispersing canker sores and canker sores, dermatitis, etc., which are inflammatory skin diseases. For example, the treatment of folliculitis, acne and dermatitis of the lower extremities in Western medicine, forsythia is quite effective. In addition, there is also a phlegm nucleus, gall disease, mainly goiter, or thyroid nodules, also often used for forsythia, to detoxify and disperse the nodules.