Condition guide · Hip, knee and lower limb
Meniscal Tear
In middle-aged knees, a torn meniscus on a scan is common, often painless, and usually does not need an operation. Ten years after randomisation, keyhole surgery had produced no advantage over twelve weeks of exercise.
In plain words. The menisci are two C-shaped pads of cartilage that sit between the thigh bone and the shin bone, spreading load across the knee. They can tear suddenly through injury, or gradually wear and split with age.
This page is about the second kind — the degenerative tear found in middle-aged and older knees, which is what almost all of the good evidence studied. For those tears, exercise and keyhole surgery produce much the same result, and the exercise avoids an operation.
What this page does not cover. A knee that is locked and cannot be straightened, or a large tear from a clear twisting injury in a younger athlete, is a different problem with different evidence. The trials below recruited middle-aged adults with degenerative tears and little or no arthritis on x-ray. Do not read their conclusions across to a locked knee.
Key points
- Most meniscal tears found on scans cause no symptoms. In a population study of 991 knees, 61% of people who had a meniscal tear had had no pain, aching or stiffness in the previous month. [4]
- Tears are extremely common with age — found in 19% (95% CI 15 to 24) of women aged 50 to 59 and 56% (95% CI 46 to 66) of men aged 70 to 90. [4]
- At two years, surgery and exercise were equivalent. The difference in KOOS4 between arthroscopic partial meniscectomy and 12 weeks of supervised exercise was 0.9 points (95% CI -4.3 to 6.1, P=0.72). [1]
- Exercise built more muscle. Thigh muscle strength improved in the exercise group at three months (P≤0.004). [1]
- At ten years, still no advantage to surgery. Radiographic osteoarthritis had developed in 23% of the surgery group and 20% of the exercise group (adjusted risk difference 3%, 95% CI -13% to 19%). [2]
- Adding surgery to exercise adds nothing at five years — moderate-certainty evidence from a meta-analysis of four randomised trials. [3]
- 19% of those assigned exercise had surgery anyway within two years, and gained no additional benefit from it. [1]
- Neither treatment caused serious harm in the trial over two years of follow-up. [1]
What is actually happening
Each knee has two menisci, wedge-shaped pads that deepen the joint surface and distribute load. With age the tissue becomes less elastic and more brittle, and it can split without any particular injury — often the person cannot recall a moment when it happened, or recalls something trivial like standing up from a squat.
The crucial point is that this process is part of the same story as osteoarthritis rather than a separate accident. A degenerative meniscal tear is frequently a marker of a knee that is changing with age, not the sole cause of the pain. That is why removing the torn part often does not remove the symptoms.
An acute traumatic tear — a young knee twisted under load, sometimes with the joint locking — is mechanically different, and is not what the evidence on this page addresses.
What it feels like
- Pain along the joint line, on the inner side more often than the outer.
- Discomfort with twisting, squatting, kneeling and getting out of a car.
- Swelling that comes and goes, usually mild and often a day after activity.
- Catching or clicking, which is common and on its own not alarming.
- Often a gradual onset with no clear injury.
A knee that genuinely locks — that you cannot fully straighten, and that stays that way — is different, and should be assessed promptly rather than managed with exercise alone.
How it is diagnosed
Clinically first, from the history and examination. MRI shows meniscal tears very reliably, which is precisely the problem: it shows them in people who have no symptoms too.
The population figures are worth stating in full, because they change how a scan report should be read. Among people with x-ray evidence of osteoarthritis, a meniscal tear was present in 63% of those with knee pain and in 60% of those without — essentially the same. Among those without x-ray osteoarthritis, the figures were 32% with symptoms and 23% without. [4]
So a scan reporting a tear does not establish that the tear is causing the pain. It establishes that you have a tear, which most people your age also have. The clinical question — does this knee's behaviour match this finding? — still has to be answered by examination.
How physiotherapy and rehabilitation help
Rehabilitation does not repair the meniscus. It changes what the knee can tolerate: the strength of the thigh muscles that absorb load, the control of the knee during squatting, stairs and turning, and the capacity of the whole limb. In the trial that tested it, that was enough to match an operation.
The Norwegian OMEX trial randomised 140 adults with an MRI-verified degenerative medial meniscal tear — mean age 49.5 years, 96% with no definitive radiographic osteoarthritis — to either arthroscopic partial meniscectomy alone or 12 weeks of supervised exercise therapy alone. At two years the difference in KOOS4 was 0.9 points (95% CI -4.3 to 6.1, P=0.72): not merely non-significant, but with an interval narrow enough to exclude a clinically relevant difference. [1]
What a programme involves
| Component | What it is for | Evidence |
|---|---|---|
| Supervised progressive exercise therapy the trial programme ran 12 weeks, two to three sessions a week |
Rebuilding thigh strength and the knee's tolerance of load, so the same knee does more with less pain. | Supported Equivalent to surgery on KOOS4 at 2 years (0.9 points, 95% CI -4.3 to 6.1) [1] and at 10 years [2] |
| Quadriceps and hamstring strengthening | Restoring the muscle that protects the joint — the one measurable advantage exercise had over the operation. | Supported Thigh muscle strength improved in the exercise group at 3 months (P≤0.004); the surgical group did not show this [1] |
| Education about what the scan means | Understanding that a tear on MRI is common and often silent, so the report does not by itself call for an operation. | Supported by the evidence base 61% of people with meniscal tears had no symptoms in the previous month [4] |
| Graded return to squatting, stairs and turning | Rebuilding tolerance of the specific movements that provoke the knee. | Not separately tested Part of the supervised programmes studied, not isolated as its own comparison [1] |
| Arthroscopic partial meniscectomy keyhole trimming of the torn part |
Removing the damaged meniscal tissue. | No advantage No clinically relevant benefit over exercise at 2 years [1] or 10 years [2]; adding it to exercise adds nothing at 5 years, on moderate certainty [3] |
| Surgery to prevent later arthritis | Sometimes offered on the reasoning that a torn meniscus will wear the joint out. | Not supported At 10 years, radiographic osteoarthritis had developed in 23% of the surgery group and 20% of the exercise group [2] |
| Electrotherapy ultrasound, TENS, laser, shockwave |
Commonly offered for knee pain. | Not tested here None of the sources cited on this page evaluated them, so this page makes no claim either way |
An amber badge means the sources cited on this page did not test that component — not that it fails. It is a statement about the evidence available here, not a verdict.
What happened after ten years
Long-term follow-up matters here more than usual, because the argument for operating has often been about the future rather than the present: trim the tear now to protect the joint later. The same 140 participants were followed for ten years to test exactly that. [2]
The primary outcome was radiographic osteoarthritis progression on the OARSI atlas sum score. The adjusted mean difference in change was 0.39 (95% CI -0.19 to 0.97), with slightly more progression in the surgical group — a difference that does not reach significance but certainly does not favour the operation. Radiographic osteoarthritis developed in 23% of the surgery group against 20% of the exercise group (adjusted risk difference 3%, 95% CI -13% to 19%). There were no clinically relevant differences in patient-reported outcomes or muscle strength, and both groups had improved in pain and knee function. [2]
So the protective argument does not hold up. Ten years on, the knees that had surgery were not in better structural condition than the knees that exercised.
The one result that favoured surgery, and why it should be read carefully
A 2023 meta-analysis pooled four randomised trials comparing exercise against arthroscopic partial meniscectomy plus exercise at five years. On KOOS pain, symptoms, activities of daily living and quality of life there were no significant differences. On one subscale — sport and recreation — there was a significant difference favouring surgery plus exercise (-9.28, 95% CI -18.28 to -0.29). [3]
That is the single result in this literature that points toward the operation, and it deserves to be reported rather than buried. But the same paper tested how robust it was: a leave-one-out sensitivity analysis, removing one trial at a time, made the sport and recreation difference non-significant (-5.05, 95% CI -12.04 to 1.94). [3] A finding that disappears when any single study is removed is not a finding to plan an operation around.
The authors' overall conclusion, at moderate certainty, is that adding arthroscopic partial meniscectomy to an exercise programme adds no benefit in knee function at five years. [3]
What a course of treatment looks like
Assessment first, to establish whether the knee's behaviour actually matches the scan — and to identify a locked knee, which is a different pathway. Then an explanation of what the imaging means, which for many people is the most useful part of the appointment.
The programme itself is progressive strengthening of the thigh and hip with graded return to the movements that provoke the knee. The trial used 12 weeks of supervised exercise, and that is a reasonable expectation to set: this is a course measured in months, and appointments are for progressing load rather than for passive treatment. [1]
If it does not work, surgery remains available and nothing has been lost by trying first. In the trial, 19% of those assigned to exercise crossed over to surgery within two years — and the paper reports that they gained no additional benefit from it. [1] That is worth knowing before you decide that failure of exercise automatically means an operation will succeed.
Two questions the 2022 and 2025 trials answer
Does this apply to younger people too? The degenerative-tear trials recruited middle-aged and older adults, so a reasonable objection is that younger patients are different. That was tested directly: 121 young adults, mean age 29.7, randomised to early surgery or to exercise and education with surgery available later. At 12 months there was no statistically significant difference in KOOS4 change (adjusted mean difference 5.4, 95% CI -0.7 to 11.4), and both groups improved to a clinically relevant degree. One in four of the exercise group did eventually have surgery. [6]
How much supervision does the exercise need? A 2025 trial of 879 participants with degenerative meniscal tear compared a home exercise programme against the same programme plus adherence text messages, and against home exercise plus texts plus standard supervised physical therapy. Adding either the messages or the supervised therapy was not superior for pain at three months — the differences were 0.1 and 2.5 KOOS pain points, with confidence intervals spanning zero. [5] Adverse events were generally non-serious and evenly spread.
That second finding is worth sitting with. It does not say physiotherapy is useless here; it says that for this specific problem, a well-designed home programme carried most of the benefit, and adding supervision on top did not measurably improve pain. The assessment that produces the right programme is a different question from the supervision of it.
The menisci sit between the thigh bone and shin bone as load distributors. Degenerative tears are extremely common with age and frequently cause no symptoms at all. [4]
What the evidence supports — and what it does not
Supported
- Supervised exercise therapy as first-line treatment for degenerative meniscal tears in middle-aged knees. [1]
- Equivalence with surgery at two years, with an interval narrow enough to exclude a clinically relevant difference. [1]
- Equivalence sustained at ten years, including on joint structure. [2]
- A strength advantage for exercise at three months. [1]
- Reading MRI reports cautiously — 61% of people with tears had no recent symptoms. [4]
- Trying exercise first, since surgery remains available afterwards. [1]
Not supported
- Keyhole surgery as the default for a degenerative tear. [1][2]
- Operating to prevent future arthritis. 23% versus 20% at ten years. [2]
- Adding surgery to an exercise programme. No benefit at five years, moderate certainty. [3]
- The sport and recreation result as a reason to operate. It did not survive sensitivity analysis. [3]
- Treating an MRI report as a diagnosis. Tear prevalence was 63% with pain and 60% without among knees with radiographic osteoarthritis. [4]
- Assuming surgery will work if exercise did not. Crossover patients gained no additional benefit. [1]
How certain is this?
Evidence grade: Moderate to high.
This is one of the better-evidenced questions on this site. The central comparison is a randomised controlled trial with two-year and ten-year follow-up, reinforced by a meta-analysis of four randomised trials at five years rated moderate certainty, three of which were at low risk of bias. [1][2][3] The findings are consistent across all of them and across different outcome types — symptoms, function and joint structure.
The main limitation is size and scope. The trial randomised 140 people in one country, and the ten-year comparisons on structural progression carry confidence intervals wide enough to include modest differences in either direction (adjusted risk difference 3%, 95% CI -13% to 19%). [2] Equivalence is well supported; a precise estimate of any small difference is not.
Crossover complicates interpretation: 19% of the exercise group had surgery within two years, and an intention-to-treat analysis holds them in their original group. [1] This tends to make the two arms look more alike, and it is a real caveat — though the reported absence of additional benefit in those who crossed over argues against surgery being the hidden ingredient.
The prevalence figures come from a single well-conducted population study of 991 knees in one American cohort, and may not transfer precisely to other populations. [4] The broad point — that tears are common and frequently silent — is not in doubt.
Finally, scope. All of this concerns degenerative tears in middle-aged and older adults with little or no radiographic arthritis. It says nothing about a locked knee or an acute traumatic tear in a young athlete.
What to expect
Improvement over weeks to months rather than days, and judged by what you can do — stairs, squatting, walking distance — rather than by whether the knee ever clicks.
Expect the strength gains first. Expect some days to be worse than others; a degenerative knee fluctuates, and a bad week is not evidence that the programme has failed.
Clicking and catching often persist even when pain and function improve, and on their own are not a reason to operate. If the knee locks and will not straighten, that is a different matter and should be assessed.
Common questions
My scan shows a tear. Doesn't that mean I need surgery?
Not by itself. Meniscal tears are common findings in middle-aged and older knees, and most are silent: 61% of people found to have a tear had had no pain, aching or stiffness in the previous month. [4] Among knees with radiographic osteoarthritis, a tear was present in 63% of people with pain and 60% of those without. [4] The scan tells you the tear exists; it does not tell you it is the problem.
Is surgery quicker than months of exercise?
Quicker to perform, but not better at the end. At two years the difference between surgery and 12 weeks of exercise was 0.9 points on KOOS4, with a confidence interval narrow enough to rule out a clinically important difference. [1] At ten years there was still no advantage, including on the state of the joint. [2] Exercise also improved thigh muscle strength, which surgery did not. [1]
If I don't have it trimmed, will it wear my knee out?
The evidence says no. That was the specific question of the ten-year follow-up: radiographic osteoarthritis developed in 23% of the surgery group and 20% of the exercise group, and structural progression was, if anything, slightly greater after surgery. [2] The protective argument for operating is not supported.
What if exercise doesn't work? Have I wasted months?
Surgery remains available, so nothing is closed off by trying first. But set expectations honestly: in the trial, 19% of people assigned to exercise went on to have surgery within two years, and the report states they gained no additional benefit from it. [1] Failure of exercise does not guarantee success of an operation.
My knee clicks and catches. Is that damage?
Usually not, on its own. Clicking and catching are common and frequently persist even as pain and function improve. What matters is a knee that truly locks — one you cannot fully straighten and that stays that way. That is a different problem from the degenerative tears studied here and should be assessed promptly.
I'm 25 and twisted my knee playing football. Does this page apply to me?
No. Every trial cited here recruited middle-aged adults with degenerative tears and little or no arthritis on x-ray — the OMEX participants had a mean age of 49.5 years. [1] An acute traumatic tear in a young athlete is mechanically different and the evidence above should not be read across to it. Get it assessed on its own terms.
Is this the same as knee osteoarthritis?
Related, and often part of the same process. A degenerative meniscal tear is frequently a sign of a knee changing with age rather than a separate accident, which is one reason trimming it often does not resolve the pain. If you have joint-line pain, stiffness and x-ray changes, see knee osteoarthritis, where the management overlaps substantially.
References
- Kise NJ, Risberg MA, Stensrud S, et al. Exercise therapy versus arthroscopic partial meniscectomy for degenerative meniscal tear in middle aged patients: randomised controlled trial with two year follow-up. BMJ. 2016 Jul 20;354:i3740. doi:10.1136/bmj.i3740 PMID 27440192 Randomised controlled trial
- Berg B, Roos EM, Englund M, et al. Arthroscopic partial meniscectomy versus exercise therapy for degenerative meniscal tears: 10-year follow-up of the OMEX randomised controlled trial. British Journal of Sports Medicine. 2025 Jan 2;59(2):91–98. doi:10.1136/bjsports-2024-108644 PMID 39326908 Randomised controlled trial, 10-year follow-up
- Fernández-Matías R, García-Pérez F, Gavín-González C, et al. Effectiveness of exercise versus arthroscopic partial meniscectomy plus exercise in the management of degenerative meniscal tears at 5-year follow-up: a systematic review and meta-analysis. Archives of Orthopaedic and Trauma Surgery. 2023 May;143(5):2609–2620. doi:10.1007/s00402-022-04579-y PMID 35996030 Systematic review and meta-analysis
- Englund M, Guermazi A, Gale D, et al. Incidental meniscal findings on knee MRI in middle-aged and elderly persons. New England Journal of Medicine. 2008 Sep 11;359(11):1108–1115. doi:10.1056/NEJMoa0800777 PMID 18784100 Population-based cohort study
- Katz JN, Collins JE, Bisson L, et al. A Randomized Trial of Physical Therapy for Meniscal Tear and Knee Pain. New England Journal of Medicine. 2025 Oct 30;393(17):1694–1703. doi:10.1056/NEJMoa2503385 PMID 41160820 Randomised controlled trial
- Skou ST, Hölmich P, Lind M, et al. Early Surgery or Exercise and Education for Meniscal Tears in Young Adults. NEJM Evidence. 2022 Feb;1(2):EVIDoa2100038. doi:10.1056/EVIDoa2100038 PMID 38319181 Randomised controlled trial
About this guide
If you need assessment
This page explains. It does not diagnose.
A knee that locks and will not straighten needs to be assessed rather than managed from a web page, and decisions about surgery belong with an orthopaedic surgeon. Physiotherapist India publishes information and takes no bookings. Ask a qualified physiotherapist to examine your own case before acting on anything written here.