You should not continue walking after a posterior meniscus tear, because when walking, the knee joint will be weighted and the damaged meniscus will be stimulated by external forces, which can further aggravate the tear, resulting in significant swelling, pain, interlocking and impingement of the meniscus, as well as limited movement of the knee joint. After a posterior meniscus tear, it is necessary to stop walking and rest in bed. The knee joint should be externally fixed with a brace or plaster brace, and a topical blood pain relief cream or golden ointment should be applied, or joint lubricant or oral glucosamine sulfate can be injected into the knee joint. If the condition does not resolve, minimally invasive surgery is required, and meniscal repair can be performed through knee arthroscopy.