Meniscal tears are one of the most common causes of knee pain and are often referred to as “cartilage tears.” They frequently occur after a twisting movement of the knee, where someone feels that the knee has never quite felt right since. In this article, we’ll look at what meniscal tears are, why they happen, the different types of tear, how they’re diagnosed, and most importantly, which treatments are most effective depending on the type of tear and your age.
The information can also be seen in video format below
What Is the Meniscus?
Each knee has two menisci: a medial meniscus on the inside of the knee and a lateral meniscus on the outside. They are crescent-shaped structures made of fibrocartilage that sit inside the knee joint. Their role is to distribute load across the knee, improve stability, reduce friction, and help protect the joint surfaces.
One of the most important things to understand about the meniscus is its blood supply. Only the outer edge of the meniscus has a good blood supply, known as the red-red zone. The middle region has a limited blood supply, called the red-white zone, and the inner third has virtually no blood supply, known as the white-white zone. This matters because blood supply strongly influences healing potential. Tears on the outer edge are much more likely to heal than tears closer to the centre.
How Meniscal Tears Happen
Meniscal tears generally fall into two categories: Traumatic Tears and Degenerative Tears.
Traumatic meniscal tears are more common in younger, active people. They usually occur during a twisting injury when the foot is planted, such as during football, rugby, hockey or basketball. When you hear people talking about having a “torn cartilage,” they are usually referring to a meniscal tear.
Degenerative meniscal tears are more common in people over the age of 40. They usually develop gradually as the meniscal tissue becomes weaker and thinner with age. Often there is no clear injury, and symptoms may begin during everyday activities such as squatting, kneeling or turning.
Symptoms of a Meniscal Tear
Meniscal tears typically cause pain on one side of the knee joint. Medial meniscal tears are more common and usually cause pain on the inside of the knee, while lateral meniscal tears cause pain on the outside. Symptoms are often intermittent and are aggravated by weight-bearing activities, particularly twisting movements, deep squatting or kneeling.
Larger tears can cause what are known as mechanical symptoms. These include catching, sudden sharp pains, or locking of the knee, where it temporarily gets stuck. This usually occurs when a loose fragment of torn meniscus becomes trapped between the joint surfaces.
Types of Meniscal Tears
There are several different patterns of meniscal tear, and the type of tear plays a key role in determining treatment options.
Longitudinal tears run vertically along the length of the meniscus and follow the direction of the fibres. These tears have good healing potential, particularly if they are located in the outer blood-supplied zones.
Bucket-handle tears are a type of large longitudinal tear where part of the meniscus flips into the joint like a handle. These often cause locking or sticking of the knee and usually require surgical treatment.
Radial tears run from the inner edge of the meniscus outward. Because they cut across the fibres, they disrupt the load-sharing function of the meniscus and do not tend to heal well, especially if they extend across all blood supply zones.
Horizontal cleavage tears split the meniscus into a top and bottom layer. These are often degenerative and commonly seen alongside early osteoarthritis. They are usually managed without surgery unless they cause mechanical symptoms.
Flap tears involve a small fragment of meniscus becoming loose and intermittently catching in the joint, causing sudden sharp pain or locking sensations. These are often treated surgically by trimming the unstable fragment.
Complex tears are combinations of different tear patterns and are usually degenerative. They often have messy, irregular, frayed edges and as such are not usually suitable for repair, although they may be treated surgically by debridement (trimming) if symptoms persist.
Root tears occur where the meniscus attaches to the bone. They are considered a serious tear because the root is the main anchor point for the meniscus and when its torn, the entire meniscus looses its ability to function properly – so its like losing the entire meniscus. Meniscal root tears nearly always cause significant symptoms of pain and a feeling of instability particular when putting stress through the knee or deep squatting. Root tears usually need surgical treatment in order to restore knee function, and they do need treating quickly in order to avoid developing secondary osteoarthritis.
Diagnosis and Imaging
Diagnosis of a meniscal tear is based on your symptoms, clinical examination and, in some cases, imaging. Pain with twisting movements, deep knee bending and joint-line tenderness can all point towards a meniscal injury. Mechanical symptoms such as locking or catching may suggest a larger tear.
MRI scans are commonly used to confirm the diagnosis and identify the tear pattern. However, MRI findings must always be interpreted alongside symptoms. Many people over the age of 40 have degenerative meniscal tears on MRI without any pain at all. For this reason, treatment decisions should never be based on scan results alone.
X-rays are useful to assess for osteoarthritis. This is important because meniscal surgery is much less effective when significant arthritis is present, and degenerative meniscal tears are often part of the arthritic process rather than a separate problem.
Which Meniscal Tears Get Better Without Surgery?
The good news is that many meniscal tears improve with conservative treatment. Degenerative tears often settle over time, particularly if there is no true locking of the knee. Small stable longitudinal tears, horizontal cleavage tears and degenerative complex tears commonly respond well to non-surgical management.
In many cases, pain comes from inflammation and irritation around the knee rather than the tear itself, and this can reduce with appropriate rehabilitation.
Conservative Treatment Options
Exercise-based rehabilitation is the most effective treatment for many meniscal tears. Strengthening the quadriceps, hamstrings and gluteal muscles helps reduce load on the meniscus and improves knee control and confidence. Activity modification, such as temporarily avoiding deep squatting or twisting movements, can also help symptoms settle. A Knee support brace can also be helpful during the early stages – see below.
Pain relief and short courses of anti-inflammatory medication may be helpful during flare-ups. Injections, such as corticosteroid injections, can provide short-term symptom relief in degenerative tears. Other injections, including hyaluronic acid and platelet-rich plasma, are offered in some clinics but evidence for their effectiveness remains mixed.
A dedicated exercise programme for meniscal tears is demonstrated in a separate video, which is linked to below.
When Does Surgery Make Sense?
Surgical management of meniscal tears has changed significantly over the years. The meniscus is now recognised as a vital structure, and preserving as much of it as possible is a priority.
Meniscal repair aims to stitch the tear together and allow it to heal. This is most successful in younger patients with traumatic tears, particularly longitudinal, bucket-handle or root tears located in the blood-supplied zones. Repair preserves the meniscus and reduces the long-term risk of osteoarthritis, but recovery is longer.
Meniscal debridement, also known as partial meniscectomy, involves trimming away only the unstable torn fragment. This is usually reserved for tears that cannot be repaired, such as flap tears or complex degenerative tears causing mechanical symptoms. The more meniscal tissue that must be removed, the greater the long-term risk of developing osteoarthritis.
Does Age Influence Treatment Options?
Age plays an important role, but it is not the only factor. Younger patients tend to have better healing potential and higher success rates with repair. In people aged 40 to 60, meniscal tears are more often degenerative, and surgery is usually only considered if mechanical symptoms persist despite good rehabilitation.
In people over 60, meniscal tears are almost always part of a broader osteoarthritic process. Treatment is therefore focused on managing knee arthritis rather than the tear itself, with exercise, load management and injections forming the mainstay of care.
Recovery Expectations
Recovery depends on the treatment approach. With conservative management, improvement usually occurs over several weeks to months. Meniscal repair requires a longer recovery period, often several months, as the fibrocartilage tissue of the meniscus heals slowly. Meniscal debridement generally allows a faster return to normal activities, often within a few weeks, but may carry a higher long-term risk of arthritis if significant tissue is removed.
New and Emerging Treatments
Several emerging treatments are being explored, although most are still in the research phase. Biologic treatments such as platelet-rich plasma aim to support healing using the body’s own repair mechanisms. Meniscal scaffolds and implants are designed to replace lost meniscal tissue and encourage new tissue growth, and meniscal transplantation may be considered in younger patients with significant meniscus loss.
These treatments are currently offered mainly in specialist or research centres, but ongoing research may expand their availability in the future.
Summary
Meniscal tears are common, but they vary widely in type, cause and severity. With the right diagnosis and a treatment plan tailored to the individual, most people do very well. Understanding whether a tear is likely to heal, respond to rehabilitation or benefit from surgery is key to making informed decisions about knee pain management.
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