The role of neck, shoulder, back and leg pain patch is mainly in three aspects: First, these drugs contain ingredients that activate blood circulation and eliminate blood stasis, which can effectively play the role of activating blood circulation and promoting local metabolism, the arterial blood supply can increase, which can promote the nutrition of surrounding tissues as well as energy support, which can increase venous return, which can reduce inflammatory edema, promote the metabolism and absorption of inflammatory metabolites, and effectively relieve the related symptoms. Second, the role of dredging the meridians and channels, the drug inside has the ingredients to soothe the tendons and channels, Chinese medicine says that if it does not pass, it hurts, therefore, after dredging the meridians become smooth, this pain can also be significantly improved. Thirdly, it has the effect of warming the meridians and dispersing cold. After applying it, it can effectively warm up Yang Qi and promote the excretion of cold Qi in the body, because many patients with neck, shoulder, back and leg pain are afraid of cold and usually feel their joints are cold.