17219 Torn Meniscus

Overview

A torn meniscus is a common knee injury that damages one of the c-shaped pieces of tissue (cartilage) that cushion your knee joint and help it move smoothly. This injury can cause pain, swelling, and difficulty moving your knee.

Yes — it is one of the most frequent knee injuries, affecting millions of people each year. It is especially common in athletes and in older adults.

Anyone can tear their meniscus, but it is more likely if you play sports that involve sudden turns or contact, or if you are older and the knee cartilage has become weaker.

Symptoms

Common symptoms

• Pain in the knee, especially when twisting or rotating it
• Swelling that may appear over a few hours afterwards
• A popping sensation at the time of injury
• Feeling like the knee may give way or catch
• Stiffness and trouble straightening your knee fully
• Locking — the knee gets stuck and cannot bend or straighten

Symptoms in children

• Children often feel pain but may not be able to describe exactly where it hurts.
• They may limp or avoid putting weight on the affected leg.
• Swelling and crying when the knee is moved can also be signs.

Symptoms in older adults

• Older adults may not remember a specific injury — the tear can happen from a simple movement like getting out of a chair.
• Symptoms may be milder, with more stiffness and aching rather than severe swelling.
• Pain may come and go and be worse when kneeling or squatting.

Causes

Main causes

• Suddenly twisting your knee while your foot is planted, such as turning quickly in sport
• A direct blow to the knee, for example in a football tackle
• Deep squatting or heavy lifting that strains the knee
• Age-related degeneration — the meniscus becomes less flexible and can tear with a simple movement

Risk factors

• Playing contact or pivoting sports like soccer, basketball, or tennis
• Being older — the meniscus weakens over time
• Having a previous knee injury or surgery
• Being overweight, which puts extra pressure on the knee joint
• Working in jobs that require kneeling, crouching, or lifting heavy loads

When to see a doctor

See a doctor urgently if:

• You cannot put any weight on your leg
• You have a locked knee that will not straighten or bend
• You have severe pain or your knee suddenly gives way
• You develop sudden numbness, tingling, or coldness in your lower leg

Book a routine appointment if:

• Knee pain or swelling that lasts more than a few days despite rest
• Trouble walking, going up stairs, or getting in and out of chairs
• Your knee feels unstable or like it might buckle
• You want a clear diagnosis and a treatment plan

Diagnosis

A doctor will ask how the injury happened, discuss your symptoms, and examine your knee. They may press on different parts of your knee and ask you to move it in certain ways to see which movements cause pain. Imaging tests can help confirm the diagnosis.

Tests that may be done

• Physical examination — checking for swelling, tenderness, and range of motion
• X-ray — used to rule out a broken bone (it does not show soft tissue like cartilage)
• MRI (magnetic resonance imaging) scan — gives detailed pictures of the meniscus and other soft tissues
• Ultrasound — sometimes used to look at soft tissue structures around the knee

What to expect at your appointment

The doctor may recommend conservative treatment first, such as rest and physiotherapy. If the tear is severe or does not heal, you may be referred to an orthopaedic specialist (a doctor who treats bone and joint problems) for further assessment.

Treatment

Most meniscal tears do not require surgery. Treatment focuses on reducing pain and swelling, restoring movement, and strengthening the muscles around the knee. The best approach depends on the size, location, and type of tear, as well as your age, activity level, and health.

Self-care at home

• Rest the leg and avoid activities that put weight on the knee, especially twisting or deep squatting
• Apply an ice pack wrapped in a cloth for 15–20 minutes every few hours to reduce swelling
• Use a compression bandage or knee wrap as advised, but not so tight that it cuts off circulation
• Keep the leg raised on a pillow when sitting or lying down
• Use crutches or a walking aid if you are unsteady, but follow a healthcare professional’s advice

Medical treatments

Your doctor or pharmacist can advise on appropriate pain relief. Physiotherapy is the most important part of treatment, helping to strengthen the thigh muscles and restore knee movement. For severe inflammation, an injection into the knee may be used, but this is not a cure and does not repair the tear.

When is surgery considered?

Surgery may be recommended if the tear is large, causes locking or giving way, or does not improve with conservative care. Keyhole surgery (arthroscopy) is the most common approach. The surgeon may trim away the damaged part of the meniscus (partial meniscectomy) or, in some cases, stitch the tear back together (repair). Full recovery takes time and physiotherapy after surgery is essential.

Living with this condition

Give your knee time to heal. Follow your healthcare team's advice on how much weight you can put on your leg. Use crutches, a brace, or support if recommended. Gradually return to daily activities as pain allows, and avoid movements that bring back pain.

Lifestyle tips

• Maintain a healthy weight to reduce pressure on your knee
• Strengthen your leg muscles, especially your thigh muscles (quadriceps), with gentle exercises recommended by a physiotherapist
• Warm up properly before exercise and cool down afterwards
• Choose low-impact activities such as swimming, cycling, or using an elliptical machine to stay active without jarring your knee

Diet and exercise

Eat a balanced, varied diet with plenty of fruit, vegetables, and foods rich in calcium and vitamin D to support bone health. Regular low-impact exercise is important — not just for your knee, but for your overall health. Swimming and cycling are especially good because they exercise the knee without high impact. Before starting any new exercise, ask your doctor or physiotherapist which activities are safe for you.

Mental health and emotional wellbeing

Living with a knee injury can be frustrating, especially if you have to limit your favourite activities. It is normal to feel down, anxious, or worried about recovery. If you notice that low mood persists, talk to your doctor. You may also find it helpful to set small recovery goals and stay socially connected. If you ever feel you are in crisis, contact a mental health support service or your local emergency services.

Prevention

You cannot always prevent a torn meniscus, but you can reduce your risk by keeping the muscles around your knee strong, using good technique during sport, wearing supportive footwear, and avoiding sudden increases in training intensity.

Complications

If left untreated

• Persistent knee pain and weakness
• A feeling of instability or the knee giving way
• Locking of the knee, making it hard to bend or straighten
• Increased risk of later osteoarthritis in the affected knee

Long-term outlook

The outlook for a torn meniscus is very good. Most people recover with rest, physiotherapy, and patience. With the right treatment, many return to their usual activities within a few weeks, though some tears take longer. Taking care of your knee through strengthening and maintaining a healthy weight can help protect it in the long term.

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