Meniscus Tear
What Is a Meniscus Tear?
The menisci are two crescent-shaped pads of fibrocartilage between the thighbone and shinbone. The medial meniscus sits on the inner side of the knee and the lateral meniscus on the outer side. Together they spread load across the joint, absorb shock and contribute to stability as the knee moves. A meniscus tear is a split or disruption within this tissue.
A new traumatic tear may behave differently from a degenerative tear in less resilient tissue. An MRI finding is not automatically the source of knee pain, particularly in middle and later age; symptoms, examination and imaging must agree.
The peripheral meniscus has a better blood supply, while blood flow decreases towards the inner portion. Healing depends on tear pattern, location and tissue quality. Treatment aims to restore function while preserving useful meniscal tissue.
What Causes a Meniscus Tear? Risk Factors and Tear Patterns
An acute tear commonly occurs when the foot stays planted and the knee pivots, changes direction, bends deeply or receives a direct impact. Football, basketball, skiing and racquet sports place the knee under these cutting and rotational loads. Cartilage or ligament damage may occur during the same injury.
- Sudden cutting, pivoting or an uncontrolled deep squat
- A direct blow to the knee during contact sport
- Reduced tissue resilience associated with ageing
- Repeated kneeling, squatting or turning while carrying a heavy load
- Altered joint loading related to osteoarthritis, an earlier injury or limb alignment
Tears are described as longitudinal, radial, horizontal, flap, bucket-handle or root tears, among other patterns. A displaced bucket-handle tear can physically block the knee, while a root tear can substantially reduce the meniscus's ability to distribute load. The pattern helps determine whether repair is possible and whether the situation needs prompt attention.
Symptoms of a Meniscus Tear
Some people feel a pop yet can still walk or play briefly. Pain and swelling may become clearer over the next several hours or days. Pain usually follows the inner or outer joint line and increases with turning, squatting or stairs.
- Pain and tenderness along the inner or outer joint line
- Swelling, stiffness and loss of normal knee movement
- Catching or painful clicking during twisting and squatting
- Difficulty fully straightening the knee or true mechanical locking
- A sensation that the knee may give way
Painless clicking alone is common and does not diagnose a meniscus tear. True locking means that the knee stops at a fixed angle as though something inside is blocking it. This should be distinguished from avoiding extension because it hurts and requires timely clinical assessment.
Meniscus Tear or Another Knee Problem?
Meniscal symptoms overlap with other knee injuries. An anterior cruciate ligament tear may produce a clear pop, rapid swelling and instability during pivoting, while a meniscus tear more often causes joint-line pain and catching. The two injuries can occur together, so symptoms alone cannot make a reliable distinction.
Osteoarthritis, patellofemoral pain, ligament sprains and loose bodies can also cause pain or locking. In a degenerative knee, the clinician decides whether an MRI finding is relevant or arthritis better explains the symptoms. A knee cartilage injury is assessed separately.
How Is a Meniscus Tear Diagnosed?
Assessment begins with the injury mechanism and symptom history, including swelling, locking, pain location, activity demands and previous knee problems. Examination covers gait, alignment, motion, swelling, joint-line tenderness and ligament stability.
McMurray and Thessaly manoeuvres apply controlled rotation to reproduce pain or catching. No single manoeuvre is conclusive. Provocative testing may be inappropriate when a new injury is very painful or weight bearing is unsafe.
An X-ray does not show the meniscus, but it can identify a fracture, alignment problem or osteoarthritis. MRI provides detailed images of the menisci, ligaments and joint cartilage, yet it is not required for every patient. It is most useful when the diagnosis remains uncertain, another injury is suspected, the result would change treatment, or surgery is being planned.
Non-Surgical Treatment for a Meniscus Tear
Without true locking or a displaced tear needing early repair, treatment commonly begins without surgery. Initially, reducing painful twisting and deep flexion, using a wrapped cold pack, compression and elevation can control symptoms. Medication must account for individual health and risks.
- Temporarily reduce pivoting, running and deep squatting that provoke pain
- Use crutches for a short period if normal weight bearing is painful
- Restore comfortable knee movement as swelling settles
- Build thigh, hip and trunk strength through progressive physiotherapy
- Reintroduce work and sports loads gradually according to the knee's response
Complete immobilisation can cause stiffness and muscle loss. With a degenerative tear, management addresses the whole knee rather than one MRI finding. Progress is judged by function and response to increasing activity.
Exercise and Rehabilitation
Exercise does not stitch a torn meniscus together. It restores motion, muscular support and load capacity. The programme reflects the tear, symptoms and goals; increased pain or swelling the next day suggests that progression was too fast.
- Control swelling and regain comfortable flexion and full extension
- Activate the quadriceps with isometric contractions
- Add straight-leg raises, bridges and controlled closed-chain strength work
- Develop single-leg balance, hip strength and lower-limb control
- Return progressively to running, jumping and changing direction after meeting functional criteria
Useful milestones include full extension, controlled swelling and confident daily activity. Athletes also need strength, balance and cutting control. After repair, limits on weight bearing and knee flexion determine progression.
Do Injections or Biologic Treatments Help?
An injection cannot mechanically close a meniscus tear. In selected patients, an intra-articular corticosteroid injection may be considered for temporary relief of pain related to accompanying inflammation or osteoarthritis, but it should not be presented as structural repair. The intended benefit and potential risks depend on the underlying diagnosis.
PRP and other biologic approaches are being studied, but do not offer a predictable result for every tear. Before considering PRP injection therapy, the goal should be clear: symptom management, an associated joint problem, or support for repair. Injections do not replace rehabilitation.
When Is Meniscus Surgery Needed?
Surgery is not recommended because an MRI simply reports a tear. A locked knee, repairable traumatic or root tear, injury preserved during ligament surgery, or persistent mechanical symptoms despite rehabilitation may warrant review. Arthroscopy is generally not first-line care for a degenerative tear with osteoarthritis.
During knee arthroscopy, a camera and fine instruments enter the joint through small portals. A suitable tear may be secured with sutures or repair devices. If damaged tissue cannot be repaired and an unstable fragment continues to catch, a limited partial meniscectomy may remove only that portion; preserving functional meniscus remains the priority.
Before meniscus surgery, the different rehabilitation requirements of repair and partial meniscectomy are discussed alongside risks such as infection, blood clots, stiffness, injury to nearby structures or continuing symptoms. No single technique suits every tear. The decision considers age, tissue quality, tear location, associated damage and the patient's activity goals.
Recovery Time and What to Expect
Recovery with non-surgical treatment is not always linear. Many people notice easier daily activity over several weeks, while rebuilding strength and tolerance for pivoting can take a few months. Long-standing symptoms, osteoarthritis and physically demanding work may lengthen that process.
Weight bearing and motion usually progress faster after partial meniscectomy. A repaired meniscus needs protection while tissue heals, so limits on loading, deep flexion and pivoting may remain in place for longer. Returning to desk work is different from returning to a job that requires kneeling, lifting or changing direction, and sport requires full motion, controlled swelling, strength and movement quality.
Follow-up considers full extension, muscle recovery, stable movement and the next-day response to ordinary loads. Rehabilitation is individualised because both excessive early loading and prolonged protection can delay function.
Can Meniscus Tears Be Prevented?
No strategy prevents every tear, particularly those caused by contact or age-related tissue change. Preparing the knee for changes in speed and direction, avoiding sudden workload jumps and improving work or sports technique can reduce controllable risk.
- Increase training intensity and running volume gradually
- Strengthen the thigh, hip and trunk regularly
- Practise knee and hip control during landing and cutting
- Use well-fitting footwear appropriate for the activity and surface
- Do not force deep squatting or pivoting through pain and swelling
When Should You See a Doctor?
Seek prompt medical assessment if the knee is stuck and cannot straighten, cannot bear weight, swells rapidly after injury or appears deformed. A hot, red and swollen knee with fever, marked calf swelling, numbness or loss of sensation also needs urgent evaluation.
Arrange an assessment if pain interferes with normal activities or sleep, keeps returning, creates instability, or does not improve after a few weeks of sensible load modification. Early review does not mean that surgery will be recommended; its purpose is to clarify the diagnosis, avoid unnecessary restrictions and start the right rehabilitation plan.
For an overview of knee conditions and treatment options, visit the Knee page. If you need an individual assessment or would like to request an appointment, use the Contact page. This information is educational and does not replace a clinical examination.