There are three main types of ointment for knee pain: first, the most common common ointment on the market: these ointments can play the role of activating blood stasis, dredging the meridians, effectively reducing the inflammatory lesions in the knee position, so that after the increase in arterial blood supply helps to recover, and after the increase in venous return helps to metabolize inflammation, all of which can relieve the symptoms of knee pain. Secondly, black ointment: it is made by applying very many Chinese herbs for processing and boiling, the effect is better than the first one. However, it is not suitable for hot weather and skin allergies, because the plaster will gradually melt in the heat, causing the skin to be blistered and soiled clothing, so it is not suitable for application in the heat. Third, magnetic therapy paste: after advocating the role of heat production, which can increase the skin temperature of the knee joint, blood circulation can be accelerated, effectively promote the metabolites and inflammation metabolism and absorption, effective relief of symptoms.