Does a worn meniscus, a rubbery knee pad, always need surgery?

Why can a worn meniscus, a rubbery knee pad, hurt?

The meniscus is a rubbery pad that spreads pressure inside the knee, and it can fray slowly as the joint becomes arthritic. The tear may cause soreness, but weak muscles or cartilage, the smooth bone covering, can also hurt.

An MRI scan, not an X-ray, can show a tear without proving it hurts.

Meniscus tear treatment: when might a torn knee pad need surgery?

A tear that develops slowly may settle without an operation. Physical therapy can build support and help the knee move with less strain. Surgery may add little when arthritis and gradual wear cause most of the soreness.

The doctor will compare how it began, whether the knee locks, your exam, and the MRI.

When does physical therapy make sense?

Therapy makes sense when the knee still bends and straightens but feels sore or weak. A therapist can work on thigh strength, hip strength, balance, and safe walking, and progress may take regular practice instead of a few visits.

The exercises shouldn't leave your knee badly swollen for days.

When does a tear need prompt attention?

A knee that locks and won't straighten needs an in-person exam. Get prompt care for sudden swelling or trouble putting weight on the leg. Those signs may point to a recent injury instead of slow wear.

Don't force a locked knee to bend or straighten.

What can I do while the knee settles?

Reduce twisting, deep bending, and long walks while the knee is very sore. Keep easy movement that feels safe, then add strength slowly. A cane can steady you and take pressure off the sore side.

Judge the knee after easy walks, not by testing it with one long walk.

What should I ask before an operation?

Ask whether the torn knee pad changed after a recent injury or wore slowly. Ask what the surgeon expects the operation to change. You also need to know whether therapy makes sense before surgery.

Repairing that pad isn't the same as replacing the knee.

Sources

1. The METEOR trial randomized 351 symptomatic patients aged 45+ with a meniscal tear AND mild-to-moderate knee OA to arthroscopic partial meniscectomy plus physical therapy or to standardized physical therapy alone. At 6 months the WOMAC physical-function improvement was 20.9 vs 18.5 points — a non-significant 2.4-point difference (95% CI -1.8 to 6.5) — and results at 12 months were similar. 30% of the physical-therapy group crossed over to surgery, meaning 70% did not.

   Katz JN, Brophy RH, Chaisson CE, et al. — Surgery versus physical therapy for a meniscal tear and osteoarthritis.. New England Journal of Medicine, 2013. DOI: 10.1056/NEJMoa1301408.

2. In a double-blind, sham-controlled trial of 146 patients aged 35-65 with a degenerative medial meniscus tear and NO knee osteoarthritis, arthroscopic partial meniscectomy produced no significant benefit over sham surgery on any primary outcome at 12 months (Lysholm 21.7 vs 23.3 points; WOMET 24.6 vs 27.1; pain after exercise 3.1 vs 3.3).

   Sihvonen R, Paavola M, Malmivaara A, et al. — Arthroscopic partial meniscectomy versus sham surgery for a degenerative meniscal tear.. New England Journal of Medicine, 2013. DOI: 10.1056/NEJMoa1305189.

3. In a placebo-surgery-controlled trial of 180 patients with knee OA, neither arthroscopic debridement nor arthroscopic lavage outperformed placebo surgery at ANY time point over 24 months on any of five self-reported pain/function scales or an objective walking and stair-climbing test.

   Moseley JB, O'Malley K, Petersen NJ, et al. — A controlled trial of arthroscopic surgery for osteoarthritis of the knee.. New England Journal of Medicine, 2002. DOI: 10.1056/NEJMoa013259.

4. A prospective longitudinal study of 64 patients with acute medial meniscus posterior root tear managed non-operatively found 76.6% continued non-operative care and only 23.4% converted to surgery (median 6 months). Pain fell from 7.6 to 1.3 on an 11-point scale within 6 months and stayed there — even though structural degeneration on MRI progressed. Symptoms and structure moved in opposite directions.

   Knee Surgery, Sports Traumatology, Arthroscopy authors — Clinical improvement despite structural degeneration after nonoperative treatment of medial meniscus posterior root tear: A prospective longitudinal study.. Knee Surgery, Sports Traumatology, Arthroscopy, 2026. DOI: 10.1002/ksa.70570.

5. The AAOS surgical-management knee OA guideline contains 16 recommendations and seven options for the surgical management of knee OA in skeletally mature patients, based on a systematic review, and explicitly documents gaps in the surgical literature.

   American Academy of Orthopaedic Surgeons — American Academy of Orthopaedic Surgeons Clinical Practice Guideline Summary of Surgical Management of Osteoarthritis of the Knee.. Journal of the American Academy of Orthopaedic Surgeons, 2023. DOI: 10.5435/JAAOS-D-23-00338.