Walking is not allowed for posterior horn meniscus tears to avoid aggravating the condition. After the occurrence of posterior horn meniscus tear, if you continue to walk will let the knee joint continue to bear weight, the injured meniscus is subjected to increased external force, the tear is also more serious, resulting in significant swelling, pain, compression, resulting in limited movement of the knee joint. Walking should be stopped after a posterior horn of meniscus tear. Conservative treatment is usually given by immobilizing the knee with a brace or plaster, and if necessary, topical plasters or oral non-steroidal anti-inflammatory drugs (e.g. celecoxib) can be used to eliminate the inflammatory reaction and reduce irritation of the posterior horn of the meniscus. If the posterior horn of the meniscus is torn, it is necessary to go to the hospital in time to complete the examination of the knee joint, to clarify the severity of the meniscus injury, and then carry out standardized treatment. The above drugs should be used under the guidance of a doctor.