Knee pain meniscus secondary injury with effusion cyst, generally associated with knee joint torsion, long-term weight-bearing cumulative injury, knee osteoarthritis, etc. Specific treatment methods are similar, you can choose general treatment, physical therapy, drug therapy, surgical treatment and so on. 1. General treatment: first of all, knee braking should be taken, which can reduce the traction on the injured tissues, make the injured tissues rest, reduce the accumulation of fluid, help to relieve the pain and promote the absorption of fluid. Elevation of the affected limb can promote venous return, which is conducive to the absorption of joint fluid and reduce knee swelling. 2. Physiotherapy: localized hot compresses and electrotherapy can promote blood circulation and accelerate metabolism, which is conducive to the absorption of fluid and alleviate the symptoms of knee joint swelling and pain. 3. Medication: Oral medication can be taken to activate blood circulation, eliminate blood stasis and reduce swelling, in order to promote the absorption of fluid, common oral medications are Longxue Capsules, Blood House by Blood Stasis Capsules and so on. 4. Surgery: If conservative treatment is ineffective, meniscus repair and suture surgery or partial meniscectomy can be used to reduce the local inflammatory reaction, reduce the effusion, and remove the cyst together. Knee pain meniscus secondary injury with effusion cysts, it is recommended to be treated under the guidance of a specialist, do not self-medication, so as not to delay the condition.