The meniscus is a crescent of tough fibrocartilage that sits between the thigh bone and the shin bone. Each knee has two, and together they cover roughly 70 per cent of the surface of the tibial plateau, spreading load, deepening a shallow joint surface and absorbing shock. The medial meniscus on the inner side is anchored firmly to the joint capsule and the medial collateral ligament, which is why it tears more often than the more mobile lateral one. Whether a tear needs surgery depends on where it sits, how it happened and how old you are, and for the largest group of people the answer from the trial evidence is that exercise therapy does as well as an operation.
Where surgery is already on the table, the costs, waiting routes and recovery expectations are set out in PhysioHub’s guide to private meniscus surgery.
Two menisci per knee, differently shaped and differently anchored, which is most of the reason they behave differently when injured.
| Feature | Medial meniscus | Lateral meniscus |
|---|---|---|
| Position and shape | Inner side of the knee, C-shaped | Outer side, more circular |
| Attachments | Fixed firmly to the capsule and the medial collateral ligament | Looser attachments, more mobile |
| Injury frequency | Torn more often | Torn less often |
| Why | Restricted movement means it absorbs shear rather than moving out of the way | Mobility lets it accommodate rotation |
| Typical examination finding | Tenderness along the inner joint line | Tenderness along the outer joint line |
Healing potential depends on blood supply, which is confined to the outer rim. The peripheral third, sometimes called the red zone, is supplied by branches of the genicular arteries and can heal or be repaired with stitches. The inner two thirds have no blood supply at all and are fed only by fluid moving through the joint, so a tear there does not knit back together. That single anatomical fact explains most of the treatment decisions below.
This is a documentary review of published anatomy, trial evidence and clinical guidance rather than advice about your knee. Five treatments were chosen because they span what is genuinely available, from doing the rehabilitation properly through to the operations, and because the ranking between them has changed substantially over the past decade.
The sources read were the StatPearls chapter on knee meniscal tears for anatomy, examination accuracy and imaging figures; the FIDELITY trial, which randomised 146 patients with a degenerative tear to arthroscopic partial meniscectomy or placebo surgery; the five-year follow-up of the ESCAPE trial in JAMA Network Open, comparing physical therapy with arthroscopic partial meniscectomy; and NICE guideline NG226 for the injection evidence. Evidence checked in August 2026.
The main limitation is that the strongest trial evidence covers degenerative tears in middle-aged and older adults, which is the largest group but not the only one. Traumatic tears in younger people, bucket-handle tears and root tears are far less well served by randomised comparison, and the surgical case for those is stronger than the headline findings suggest. This page distinguishes between the two rather than applying one answer to both.
No prices are quoted, because surgical and clinic costs could not be verified for this review.
Ask how it happened. A twist on a planted foot during sport, in someone under about 35, with swelling appearing over the following 6 to 24 hours, is a traumatic tear. A tear that appeared while standing up from a squat, in someone over 40, with no real injury to speak of, is a degenerative one.
Ask whether the knee truly locks. A knee that cannot be straightened because something is physically blocking it is mechanical locking, and it changes the plan. A knee that feels stiff and reluctant but does straighten when you work at it is not the same thing.
Know what the examination can and cannot tell you. Joint line tenderness is around 83 per cent sensitive and 83 per cent specific for a meniscal tear, and McMurray’s test is around 61 per cent sensitive and 84 per cent specific. Useful, and not definitive on their own.
Understand what an MRI will find. MRI is roughly 93 per cent sensitive and 88 per cent specific for medial meniscal tears. It is good at finding tears, including tears that are not causing the symptoms, which is why a scan result on its own does not settle whether an operation will help.
Locate the tear in the healing zones. An outer-third tear has a blood supply and can heal or be repaired. An inner-two-thirds tear cannot knit back together, and the aim shifts to making the knee work well despite it.
What it involves
A structured strengthening programme covering the quadriceps, hamstrings and hip muscles, built up over roughly three months. Typical content is quadriceps sets and straight leg raises early, progressing to wall sits and part-range squats, step-downs, glute bridges and single-leg work, with stationary cycling used throughout.
What the evidence supports
The five-year follow-up of the ESCAPE trial found exercise-based physical therapy noninferior to arthroscopic partial meniscectomy for patient-reported knee function in people with degenerative meniscal tears. The difference between groups was 3.5 points against a noninferiority threshold of 11, and progression of radiographic knee osteoarthritis was comparable between the two.
Why it works without repairing anything
Strengthening does not mend the tear. It changes how load is distributed through the joint, so the torn area is asked to do less and the knee becomes comfortable and functional with the tear still present. Plenty of people walk around with meniscal tears on imaging and no symptoms at all.
Who it suits
The great majority of degenerative tears, and any tear where there is no true mechanical locking. It is the appropriate first step even where surgery may eventually follow, because a stronger leg produces a better surgical outcome as well.
Limits and cautions
It takes about three months of consistent work, and the first few weeks can feel unproductive. It is also the option most often abandoned early, usually because a scan report describing a tear makes the knee feel like a structural problem that exercise cannot touch.
Why it ranks first
It matches surgery on function at five years, it carries none of the surgical risk, and it applies to the largest group of people with this diagnosis.
What it involves
Temporarily avoiding deep squatting, kneeling, pivoting and twisting on a loaded leg, while keeping walking, cycling and general activity going. For a simple outer-third tear, four to six weeks of relative rest alongside physiotherapy is the standard starting point.
Why it helps
Deep flexion under load and rotation on a planted foot are the two positions that compress and shear the meniscus most. Removing those specific movements lowers the mechanical provocation while the surrounding tissue settles, without unloading the leg in a way that costs strength.
Who it suits
Almost everyone in the first weeks, and particularly anyone whose symptoms are still irritable enough that strengthening cannot be started properly. Symptoms from a degenerative tear often settle substantially over a few months.
What it looks like in practice
Cycling with the seat high and the resistance low keeps the joint moving and fluid circulating. Swimming works, avoiding breaststroke leg kick. Walking on flat ground is usually fine, and hills and stairs are the part to reduce.
Limits and cautions
Time and restraint alone leave the leg weaker than it started, which is why this sits alongside strengthening rather than in place of it. Symptoms that are unchanged after two to three months of sensible management deserve reassessment.
Why it ranks second
It is what makes the first option possible, it works quickly, and on its own it addresses the symptoms without changing the knee’s capacity.
What it involves
Stitching the torn edges of the meniscus back together arthroscopically, so the tissue heals and the meniscus is preserved. Recovery is longer than for trimming: typically restricted weight-bearing and limited knee bend for several weeks, then a graded return over four to six months.
Who it suits
Traumatic tears in the outer third, in younger and active people, where there is a blood supply to support healing. It is also commonly performed alongside anterior cruciate ligament reconstruction, and healing rates for repairs done at the same time as ACL surgery are higher in the most peripheral zone.
Why preservation matters
Removing meniscal tissue increases the contact stress on the articular cartilage underneath, and menisci that have been substantially trimmed are associated with earlier joint degeneration. Keeping the tissue is worth a longer recovery when the tear is in a location that can actually heal.
What the evidence supports
The case here rests on tear location and healing biology rather than on placebo-controlled trials. Repair is not the intervention that the arthroscopy trials tested, and those trials studied degenerative tears in older adults, which is a different problem in a different population.
Limits and cautions
A repair can fail, particularly in the less well supplied middle zone, and the rehabilitation is more demanding and more restricted than after a trim. It has no role at all for a degenerative tear in the avascular inner two thirds.
Why it ranks third
It is the right answer for a specific and clearly defined group, and that group is a minority of people who are told they have a meniscal tear.
What it involves
Keyhole surgery to trim away the torn and unstable part of the meniscus, leaving a smooth stable rim. Recovery is quick compared with repair, usually with weight-bearing straight away.
What the evidence supports
The FIDELITY trial randomised 146 patients with a degenerative meniscus tear either to have the damaged tissue removed or to placebo surgery, in which the surgeon mimicked the procedure without removing anything. Both groups improved substantially, and there were no clinically important differences between them at one, two or five years. The ten-year follow-up reported in the New England Journal of Medicine found no benefit across the outcomes and raised the possibility of harm.
Where it retains a role
True mechanical locking, where a displaced fragment such as a bucket-handle tear physically blocks the knee from straightening, is a genuine indication. A fragment jamming between the joint surfaces is a mechanical problem, and no amount of strengthening removes it.
Why the reputation has changed
For years this was one of the most commonly performed orthopaedic operations in the world. The placebo-controlled and comparative trials of the past decade have narrowed its indications sharply, and the change reflects better evidence rather than any shift in surgical skill.
Limits and cautions
Removing meniscal tissue raises contact stress on the cartilage beneath it. That is a reasonable trade when a locked knee needs unlocking, and it is a poor trade for an aching knee with an incidental tear on a scan.
Why it ranks fourth
It ranks below repair and below rehabilitation for the common presentation because the trial evidence is unusually clear, and it stays on the list because the locked knee still needs it.
What it involves
An injection of corticosteroid into the knee joint, usually where pain is limiting the ability to start or continue rehabilitation.
What the evidence supports
NICE guideline NG226 positions intra-articular corticosteroid injections as a short-term option when other treatments have not worked or to support therapeutic exercise, and notes that the evidence is inconsistent, that effects last around 2 to 10 weeks, and that no benefit is apparent beyond three months.
Who it suits
Someone whose knee is too painful to load, where a window of reduced pain would let a strengthening programme get started. Used that way it has a clear purpose and a clear endpoint.
What it does not do
It has no effect on the tear itself and no lasting effect on the joint. The value is entirely in what gets done during the weeks it works.
Limits and cautions
Repeated injections into the same joint are generally avoided, and pain relief without a plan attached tends to mean the same conversation a few months later. NICE also advises against intra-articular hyaluronan injections for osteoarthritis, citing inconsistent benefit and potential harms.
Why it ranks fifth
It is genuinely useful in a narrow situation and it changes nothing structural, so it belongs at the end of the list as an enabler for the treatments above it.
| Treatment | Best suited to | Evidence | Recovery | Preserves the meniscus |
|---|---|---|---|---|
| Exercise therapy | Degenerative tears, no locking | Noninferior to surgery at 5 years | 3 months | Yes |
| Load modification | Early symptoms in any tear | Standard practice, little trial data | Weeks | Yes |
| Meniscal repair | Outer-third traumatic tears, younger patients | Based on healing biology and tear location | 4 to 6 months | Yes |
| Partial meniscectomy | True mechanical locking | No benefit over placebo for degenerative tears | Weeks | No |
| Corticosteroid injection | Pain blocking rehabilitation | Short-term only, 2 to 10 weeks | Immediate, temporary | Yes |
The last column tracks the long game. Meniscal tissue removed is gone permanently, and the load it was carrying transfers to the cartilage underneath, which is the reason preservation has moved to the centre of how these tears are managed.
What each route asks of you, including the recovery time that rarely makes it into the initial conversation.
| Treatment | Time to full recovery | Effort required | Cost |
|---|---|---|---|
| Exercise therapy | About 3 months | High, 3 to 4 sessions a week | No cost at home; physiotherapy fees not quoted here |
| Load modification | 4 to 6 weeks of restraint | Low, mostly avoidance | No cost |
| Meniscal repair | 4 to 6 months | High, with early restrictions | NHS or private; surgical fees not verified for this review |
| Partial meniscectomy | Weeks | Low initially, rehabilitation still needed | NHS or private; surgical fees not verified for this review |
| Corticosteroid injection | Effect lasts 2 to 10 weeks | Minimal | NHS or private; fees not verified for this review |
The quickest option and the best option are different rows, which is the whole difficulty of this decision. Trimming a meniscus gets someone walking within a fortnight and, on five-year and ten-year data for degenerative tears, leaves them no better off than the slower route.
If your knee cannot be straightened because something is blocking it, that is mechanical locking and it needs an orthopaedic opinion promptly rather than a rehabilitation programme.
If you are over 40 and the tear appeared without a real injury, start with three months of structured strengthening. This is the group the trials studied, and exercise therapy matched surgery at five years.
If you are under 35 and twisted the knee during sport, get it assessed properly. A peripheral traumatic tear may be repairable, and that decision is time-sensitive in a way a degenerative tear is not.
If a scan has found a tear but your symptoms are mild, remember that tears are common findings in people with no pain at all. The scan describes the anatomy; what to do about it depends on what the knee is actually doing.
If the knee swelled up severely within an hour or two of a twisting injury, that pattern suggests bleeding inside the joint and warrants urgent assessment, since it is associated with more significant injury such as a cruciate ligament tear.
If pain is stopping you starting the exercises at all, an injection to open a window is reasonable, provided the rehabilitation is booked to start inside it.
The belief people arrive holding is that a scan showing a torn meniscus means an operation is coming. It is a reasonable assumption. The word tear sounds structural, arthroscopy was for years one of the most common orthopaedic procedures performed, and plenty of people know someone who had theirs tidied up and felt better.
What the testing separates is which tear this actually is. A knee that genuinely locks, where the leg cannot be straightened because a displaced fragment is in the way, is a mechanical problem and needs a surgeon. A knee that aches on the inner joint line, hurts on deep squatting and stiffens after sitting, in someone in their fifties, is a different problem wearing the same name, and the trial evidence for that presentation is now about as clear as musculoskeletal evidence gets. In the placebo-controlled comparison, trimming the meniscus did no better than a sham operation at one, two, five or ten years. The people who improved improved either way.
At PhysioHub in Uckfield, that means the first conversation is usually about which of those two knees is in the room rather than about whether the scan found something. Where the diagnosis is settled and the question is what to do next, our page on meniscal tears sets out how they are managed here.
What is the meniscus?
The meniscus is a crescent-shaped pad of fibrocartilage inside the knee, sitting between the thigh bone and the shin bone. Each knee has two, a C-shaped medial meniscus on the inner side and a more circular lateral meniscus on the outer side, and together they cover around 70 per cent of the surface of the tibial plateau.
What does the meniscus do?
It spreads load across the knee, absorbs shock, deepens an otherwise shallow joint surface to improve stability, and helps distribute joint fluid across the cartilage. Removing meniscal tissue increases the pressure carried by the cartilage underneath it.
Why is the medial meniscus torn more often than the lateral?
Because it is anchored firmly to the joint capsule and the medial collateral ligament, which restricts how much it can move. The lateral meniscus has looser attachments and greater mobility, so it can shift out of the way of forces that the medial one has to absorb.
Can a meniscus tear heal on its own?
It depends where it is. The outer third has a blood supply from the genicular arteries and can heal or be surgically repaired. The inner two thirds have no blood supply and are nourished only by joint fluid, so tears there do not knit together, though the knee can still become completely comfortable with the tear present.
Do I need surgery for a torn meniscus?
Often not. For degenerative tears, the five-year ESCAPE follow-up found exercise therapy noninferior to arthroscopic partial meniscectomy, and the FIDELITY trial found no difference between trimming the meniscus and placebo surgery at up to ten years. True mechanical locking, where a fragment physically blocks the knee from straightening, remains a genuine surgical indication.
Why does a torn meniscus make the knee click or catch?
A displaced flap of meniscal tissue can move into the space between the thigh bone and shin bone as the knee bends and straightens, physically interrupting the smooth glide of the joint surfaces. That produces a click, a catch, or in the case of a large displaced fragment, a knee that cannot be fully straightened.
How accurate is an MRI for a meniscus tear?
MRI is around 93 per cent sensitive and 88 per cent specific for medial meniscal tears, and around 79 per cent sensitive and 96 per cent specific for lateral tears. It is very good at detecting tears, including ones that are not causing symptoms, so the scan needs interpreting alongside the examination.
What exercises help a meniscus tear?
Quadriceps sets and straight leg raises early on, progressing to wall sits and part-range squats, step-downs and glute bridges, with stationary cycling on a high seat and low resistance throughout. The aim is to strengthen the muscles that control the knee so less load passes through the torn area.
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