Patients with knee pain going down stairs and not going up stairs are mainly suffering from meniscus damage in the knee joint. Because the patient has a meniscal injury, the meniscus absorbs the external stimulus to the knee when the patient goes down the stairs, which tends to produce localized pain and can be accompanied by interlocking, which affects knee flexion and extension activities. When the patient goes up the stairs, the quadriceps muscle group is mainly injured, resulting in injury to the quadriceps muscle group, and the meniscus is not subject to external stimulation. When this occurs, the patient needs to reduce the activity of going up and down stairs and should rest in bed. At the same time, in the knee joint area, you can externally apply ointment to activate blood circulation and eliminate blood stasis, reduce swelling and pain, and also inject sodium glass acid into the knee joint, which can play the role of nourishing the meniscus and synovial membrane, and can reduce the clinical pain phenomenon.