Meniscal Tears
Understanding a common knee injury and why MRI findings can sometimes be misleading
A meniscal tear is one of the most common causes of knee pain, particularly following a twisting injury or during sporting activity. However, despite how frequently these injuries are diagnosed, the clinical picture is often more complex than many people realise.
Many patients are told they have a “torn cartilage” after an MRI scan and assume that the meniscus must therefore be the cause of their pain. In reality, research has shown that meniscal tears are extremely common even in people with completely pain-free knees. This means that identifying a tear on a scan does not always explain why the knee hurts.
Understanding whether the meniscus is genuinely responsible for symptoms requires careful clinical reasoning and a detailed physical assessment.
If you are experiencing persistent knee pain, the most useful first step is usually a thorough clinical evaluation, which you can read more about on the physiotherapy assessment page.
This page cover:
-
What Is the Meniscus?
-
The Problem With Diagnosing “Meniscal Tears”
-
Symptoms of a meniscal tear
-
Why meniscal tears are often over-diagnosed as the protagonist
-
How meniscal tears are diagnosed
-
Are scans always necessary?
-
Summary
Get WISE - Get WELL
- Get ON
What Is the Meniscus?
Inside each knee joint are two crescent-shaped structures called menisci. These are known as the:
-
Medial meniscus – located on the inner side of the knee
-
Lateral meniscus – located on the outer side of the knee
The menisci are made of fibrocartilage, a tough tissue designed to handle significant mechanical stress.
Most people are told they act as “shock absorbers”, which is true — but this description is far too simplistic.
In reality the menisci perform several critical mechanical roles:
-
Distributing load across the knee joint
-
Increasing contact area between the femur and tibia
-
Helping guide joint movement during flexion and rotation
-
Contributing to secondary joint stability
Without the menisci, the forces travelling through the knee become far more concentrated. Studies have shown that removal of meniscal tissue can increase contact stresses within the joint by several hundred percent.
This is why preservation of the meniscus is now considered extremely important in modern orthopaedics.
However, it is equally important to understand that damage seen on an MRI scan does not automatically mean the meniscus is the cause of someone’s pain.
This is where clinical reasoning becomes essential.
How Meniscal Tears Occur
Meniscal injuries generally occur through one of two mechanisms: traumatic injury or degenerative change.
Understanding the difference between these two situations is important because the treatment approach may be very different.
Traumatic Meniscal Tears
Traumatic tears typically occur during twisting movements of the knee, particularly when the foot is planted on the ground.
Common examples include:
-
Sudden changes of direction during sport
-
Twisting while the knee is bent
-
Landing awkwardly from a jump
-
Direct contact injuries
These injuries are frequently seen in sports such as:
-
football
-
rugby
-
skiing
-
tennis
Traumatic tears are more common in younger individuals with otherwise healthy cartilage.
Degenerative Meniscal Tears
Degenerative tears occur gradually as the meniscus becomes less resilient with age. Over time the tissue can become more brittle, meaning that relatively minor movements such as squatting, kneeling, or turning suddenly may lead to a tear.
These injuries are particularly common in people over the age of 40–50 years.
Importantly, degenerative meniscal tears often occur alongside early osteoarthritic changes within the knee joint, which means the meniscus may not be the only structure contributing to symptoms.
This is one reason why a scan showing a meniscal tear does not automatically mean surgery is required.
Symptoms of a Meniscal Tear
The symptoms of a meniscal injury can vary depending on the location and size of the tear.
Common symptoms include:
• Pain along the joint line of the knee
• Swelling that develops over several hours
• A sensation of clicking or catching during movement
• Difficulty fully straightening the knee
• A feeling that the knee locks or becomes stuck
Some people also report that the knee feels less stable or less reliable during activity.
However, these symptoms are not unique to meniscal tears. Similar symptoms can occur with ligament injuries, joint irritation, and patella femoral conditions. It is not unusual to have more than one site of pain generation as well.
Interestingly, the opposite situation can also occur. Meniscal tears may sometimes produce no symptoms at all. Imaging studies have shown that a significant number of people — particularly as they get older — have meniscal tears visible on MRI despite having completely pain-free knees.
This means that identifying a tear on a scan does not automatically prove that the meniscus is responsible for the pain.
For this reason, understanding the patient’s history, symptoms, and clinical examination findings is essential before making a firm diagnosis. An experienced physiotherapist is one of the best at doing this.
Why Meniscal Surgery Is Less Common Than It Used to Be
For many years, meniscal tears were commonly treated with arthroscopic surgery to remove the damaged portion of cartilage. However, large clinical studies over the past decade have shown that for many degenerative meniscal tears, surgery often provides no better long-term outcome than structured physiotherapy and rehabilitation.
This has led to a significant shift in how these injuries are managed. Many clinicians now focus first on improving knee strength, movement control, and load tolerance, rather than immediately considering surgery.
This does not mean surgery is never appropriate. Certain injuries — particularly large displaced tears that cause true mechanical locking of the knee — may still require surgical treatment. However, these situations are far less common than many people expect, and careful clinical assessment is essential before making that decision.
Meniscal Tears and Early Osteoarthritis: Why They Are Often Linked
One of the most important things to understand about degenerative meniscal tears is that they rarely occur in isolation.
In many cases, they are part of a broader process of gradual joint change within the knee, often associated with the early stages of osteoarthritis.
As the knee ages, several structures within the joint begin to change. The articular cartilage, which covers the ends of the bones, may gradually lose some of its resilience. At the same time, the meniscus can become less flexible and more prone to fraying or splitting. These changes often develop slowly over many years and may occur without any obvious injury.
Because of this, a meniscal tear seen on an MRI scan may sometimes represent a marker of underlying joint ageing rather than the primary cause of pain.
This distinction is important. If knee symptoms are being driven by changes in joint loading, cartilage health, and muscle function, then simply removing a small piece of meniscus may not address the underlying problem.
For this reason, modern management of many degenerative meniscal injuries focuses on improving the overall function of the knee joint. This may involve:
• strengthening the quadriceps and surrounding muscles
• improving movement control during walking, squatting, and stairs
• gradually rebuilding the knee’s tolerance to load and activity
Understanding this relationship between meniscal damage and early joint change helps explain why many patients improve with rehabilitation and structured physiotherapy, even when a meniscal tear is visible on imaging.
Why Knee Scans Can Sometimes Be Misleading
Modern imaging technology is extremely powerful, but it is important to understand that scans do not diagnose pain — clinicians do.
An MRI scan may reveal structures such as meniscal tears, cartilage changes, or ligament abnormalities, but these findings must always be interpreted alongside the patient’s symptoms, clinical examination, and history of injury.
Research has shown that a significant number of people with completely pain-free knees have abnormalities visible on MRI, including meniscal tears and cartilage degeneration. This means that identifying a tear on a scan does not automatically prove that the meniscus is the source of the symptoms.
For this reason, imaging should always be used as a supporting tool rather than the sole basis for diagnosis. A careful clinical assessment remains the most reliable way to determine which structure within the knee is actually responsible for the pain.
Why MRI Is Usually Preferred for Meniscal Injuries
When imaging is required to assess a suspected meniscal tear, the investigation of choice is usually Magnetic Resonance Imaging (MRI).
MRI scans are particularly useful because they allow clinicians to visualise the soft tissues of the knee, including:
• the menisci
• the ligaments
• the articular cartilage
• the surrounding joint capsule and soft tissues
This makes MRI much more suitable than other imaging techniques when evaluating internal knee structures.
Why X-rays Are Not Used to Diagnose Meniscal Tears
An X-ray is very good at visualising bone, but it does not show soft tissues such as the meniscus or ligaments.
For this reason, X-rays cannot directly diagnose a meniscal tear.
However, X-rays can still be useful in certain situations because they help identify:
• fractures
• joint alignment problems
• signs of osteoarthritis
In patients with knee pain, an X-ray may sometimes be performed to assess the overall condition of the joint, particularly if degenerative changes are suspected.
Why Ultrasound Is Rarely Used for Meniscal Injuries
Ultrasound scanning is very useful for examining structures close to the surface of the body, such as tendons and muscles.
However, the menisci sit deep inside the knee joint, surrounded by bone. Because ultrasound waves cannot penetrate bone effectively, the meniscus is very difficult to visualise using ultrasound.
For this reason, ultrasound is not typically used to diagnose meniscal tears.
1.5 Tesla vs 3 Tesla MRI Scanners
MRI scanners vary in strength, which is measured in Tesla (T).
The two most commonly used systems in clinical practice are:
• 1.5 Tesla MRI scanners
• 3 Tesla MRI scanners
A 3 Tesla scanner produces a stronger magnetic field, which can improve:
• image resolution
• signal-to-noise ratio
• the ability to detect small structural abnormalities
This can sometimes make subtle meniscal tears easier to visualise.
However, it is important to understand that both 1.5T and 3T scanners are highly capable of detecting clinically significant meniscal injuries. The quality of the images often depends just as much on scan technique and radiologist interpretation as it does on magnet strength.
In practical terms, a well-performed 1.5 Tesla MRI scan interpreted by an experienced radiologist is usually more than adequate for diagnosing most knee problems.
Why Imaging Should Always Follow Clinical Assessment
One of the most common mistakes in musculoskeletal medicine is relying too heavily on scan findings alone.
A good clinician will first consider:
• the mechanism of injury
• the pattern of symptoms
• the clinical examination findings
Imaging is then used to confirm or clarify the diagnosis, rather than to replace the clinical assessment.
This approach helps ensure that treatment focuses on the true cause of the symptoms rather than incidental findings on a scan.
You can learn more about how this process works during a detailed <a href="/physiotherapy">physiotherapy assessment</a>.
Educational Notice
This content is intended for educational guidance only and reflects current evidence and clinical reasoning at the time of publication. It does not replace individual assessment, diagnosis, or treatment provided by your healthcare practitioner. Management decisions should always be based on personalised clinical evaluation.
Feel Free To Share
There is a great deal of misinformation and oversimplified advice online regarding musculoskeletal and spinal conditions. If you have found this page helpful, you are very welcome to share it with anyone who may benefit from clear, evidence-informed information.
Please share the page in full via direct link. Reproduction, copying, or republishing of the written content or images without permission is not permitted. Producing accurate educational material of this depth takes significant time, clinical experience, and ongoing review — and I choose to keep it freely accessible for the benefit of patients and healthcare professionals.
Responsible sharing is genuinely appreciated.
Frequently Asked Questions About Knee Osteoarthritis
1) Is knee osteoarthritis the same as “wear and tear”?
The term “wear and tear” is often used to describe osteoarthritis, but the condition is more complex than simple joint deterioration.
Osteoarthritis involves gradual changes affecting several structures within the knee joint, including cartilage, bone, and surrounding soft tissues. Many of these changes develop naturally as people get older and do not always cause symptoms.
2) Is plantar fasciitis an inflammatory condition?
Not necessarily.
Many people have visible signs of osteoarthritis on X-rays or MRI scans despite having little or no knee pain. For this reason, clinicians usually interpret imaging findings alongside the patient’s symptoms and physical examination.
3) Where is knee osteoarthritis pain usually felt?
Pain is most commonly felt along the inner (medial) side of the knee, as this area of the joint often experiences greater mechanical loading during walking.
However, some people experience symptoms at the front of the knee, particularly if the patellofemoral joint is involved.
4) Can exercise make knee osteoarthritis worse?
Appropriate exercise is usually beneficial for people with knee osteoarthritis.
Strengthening the muscles around the knee helps improve joint stability and can reduce stress on the joint surfaces during movement. Exercise programmes are often an important part of managing symptoms.
5) Does knee osteoarthritis always get worse over time?
In the most yes, but how this related to pain is not always straightforwards.
Many people experience periods where symptoms improve and other times where the knee becomes more painful or stiff. With appropriate management strategies, many individuals are able to remain active and maintain good joint function for many years.
6) Can knee osteoarthritis improve without surgery?
Yes. Many people manage their symptoms successfully without surgical treatment.
Exercise-based rehabilitation, strengthening of the surrounding muscles, and managing activity levels can often help reduce pain and improve function.
7) Why does my knee sometimes flare up?
Flare-ups may occur when the joint structures become temporarily irritated.
This may happen after increased activity, prolonged loading of the joint, or minor irritation within the knee. These episodes are often temporary and may settle with appropriate activity modification.
8) When might surgery be considered?
Surgery is usually considered only when symptoms remain severe despite appropriate rehabilitation and other management strategies.
In these situations an orthopaedic specialist may assess whether procedures such as knee replacement surgery could help improve pain and function.
Why You Should Choose Chris Heywood Physio
The most important thing when seeking help is finding a practitioner you trust—someone who is honest, responsible, and clear about your diagnosis, the treatment you really need, and whether any follow-up appointments are necessary.
I’m not here to poach you from another therapist, but if you’re looking for a new physiotherapist in Northamptonshire or simply want a second opinion, here’s why many people choose to work with me (read my reviews):
Over 25 Years of Experience & Proven Expertise
With 25+ years of hands-on physiotherapy experience, I’ve built a trusted reputation for clinical excellence and evidence-based care. My approach combines proven techniques with the latest research, so you can feel confident you’re in safe, skilled hands.
Longer Appointments for Better Results
No two people—or injuries—are the same. That’s why I offer 60-minute one-to-one sessions, giving us time to:
-
Thoroughly assess your condition
-
Provide focused, effective treatment
-
Explain what’s really going on in a clear, simple way
Your treatment plan is tailored specifically to you, aiming for long-term results, not just temporary relief.
Honest Advice & Support You Can Trust
I’ll always tell you what’s best for you—even if that means you need fewer sessions, not more. My goal is your recovery and wellbeing, not keeping you coming back unnecessarily. I have low overheads nowadays and I do not have pre-set management targets to maximise patient 'average session per condition' (yes it does happen commonly and I hate it with a passion - read my article here)
Helping You Take Control of Your Recovery
I believe the best outcomes happen when you understand your body. I’ll explain your condition clearly, give you practical tools for self-management, and step in with expert hands-on treatment when it’s genuinely needed.
Looking for a physiotherapist who values honesty, expertise, and your long-term health?
Book an appointment today and take the first step towards feeling better.
Contact Info
On a Monday and Tuesday I work as a advance musculoskeletal specialist in primary care but I can still be contacted for enquiries. You are welcome to call but it is often faster for me to reply via an email or watsapp message, simply as my phone will be on silent in clinic. Either way, I will reply as soon as possible, which in the week, is almost always on the same day at the latest.
Clinic Opening Hours
** Please note that online sessions and Aquatic sessions be arranged outside of normal clinical hours on request.**
Sat -Sun
Closed
0900 - 1430
Closed - FCP
Weds - Fri
Mon - Tues