Meniscus tear overview

Overview

A meniscus tear is a common knee injury. The meniscus is a piece of cartilage (a tough, flexible tissue) that acts as a cushion between the thigh bone and shin bone. When it tears, it can cause pain, swelling, and trouble moving the knee. Think of it like a shock absorber that gets a crack or rip.

Yes, meniscus tears are one of the most common knee injuries, especially among athletes and older adults whose cartilage becomes more brittle with age.

It can affect anyone, but it’s most common in people who play sports that involve pivoting (like soccer, basketball, or tennis) and in older adults whose cartilage has weakened over time.

Symptoms

Common symptoms

• Pain, especially when twisting or rotating your knee
• Swelling that develops over 24–48 hours
• A feeling that your knee is catching, locking, or giving way
• Trouble fully straightening or bending your knee

Symptoms in children

• Children may complain of knee pain but have trouble describing exactly where it hurts
• They might limp or avoid putting weight on the injured leg
• Swelling may be mild and come on slowly

Symptoms in older adults

• The tear often happens from a minor twist or even just from standing up — not a big injury
• Pain may be dull and come on gradually
• Stiffness and creaking sounds (crepitus) are more common

Causes

Main causes

• Twisting your knee when your foot is planted on the ground — common in sports
• A sudden, forceful impact to the knee, such as a tackle in football
• Age-related wear and tear that makes the cartilage more prone to tearing from simple movements like squatting or climbing stairs

Risk factors

• Playing high-impact sports like soccer, basketball, or skiing
• Being older than 40 (cartilage naturally weakens with age)
• Having had a previous knee injury or knee surgery
• Being overweight (extra weight puts more strain on your knees)

When to see a doctor

See a doctor urgently if:

• You cannot walk or bear weight on the injured knee
• Your knee feels unstable or keeps giving out
• You have severe pain or the knee locks in place

Book a routine appointment if:

• You have ongoing knee pain that does not improve after a few days of rest
• You notice mild swelling that does not go away
• You want to return to sports or activities and need guidance

Diagnosis

Your doctor will ask about your symptoms and how the injury happened. They will then examine your knee, checking for swelling, tenderness, and range of motion. Special tests, like moving your knee in certain directions, can help find out if the meniscus is torn.

Tests that may be done

• Physical exam — the doctor moves your knee to see if certain positions cause pain
• X-ray — though it doesn't show the meniscus, it can rule out a broken bone
• MRI (magnetic resonance imaging) — this scan gives a detailed picture of your knee's soft tissues, including the meniscus, and can confirm a tear

What to expect at your appointment

An MRI is painless and takes about 30 minutes. You may have to lie still while the machine takes pictures. There's no special preparation needed. The results will help you and your doctor decide on the best treatment plan.

Treatment

Treatment depends on the size, location, and severity of the tear, as well as your age and activity level. Many tears heal with conservative (non-surgical) care, while others may need surgery. The goal is to reduce pain, restore movement, and prevent future problems.

Self-care at home

• Rest your knee — avoid activities that cause pain, but try to move it gently
• Ice the area for 15–20 minutes every 2–3 hours to reduce swelling
• Compress your knee with an elastic bandage or sleeve, making sure it's not too tight
• Elevate your leg when sitting or lying down to help fluid drain

Medical treatments

Your doctor may recommend a short course of pain relievers (like paracetamol or ibuprofen) — always follow the label or your doctor's advice. Physical therapy (exercises to strengthen the muscles around your knee) is often the main treatment. In some cases, your doctor might give you a steroid injection into the knee to reduce inflammation, but this is not a cure — it helps manage symptoms while you do therapy.

When is surgery considered?

Surgery may be considered if the tear is large, if your knee locks or gives out often, or if symptoms do not improve after 6–8 weeks of conservative treatment. The surgeon may either trim the torn piece (partial meniscectomy) or stitch it back together (meniscal repair). Your doctor will explain the risks and benefits based on your specific situation.

Living with this condition

For the first few days, take it easy. Use crutches if walking hurts. Gradually return to normal activities as pain allows. Avoid twisting or squatting until your knee feels strong again. Physical therapy will teach you exercises to get back your full range of motion.

Lifestyle tips

• Use a knee brace or wrap for support when doing activities that might stress your knee
• Wear shoes with good support to reduce strain on your knees
• Avoid high-impact activities until your doctor or physiotherapist clears you

Diet and exercise

Eating a balanced diet rich in fruits, vegetables, and lean protein supports tissue healing. Maintain a healthy weight to reduce stress on your knee. Gentle low-impact exercise like swimming, cycling (with low resistance), or walking on flat ground can keep your muscles strong without hurting your knee.

Mental health and emotional wellbeing

Dealing with a knee injury can be frustrating, especially if it stops you from doing things you love. It's normal to feel down or worried. Stay connected with friends and family, and talk to your doctor if you feel very anxious or depressed. Focusing on what you can do — like safe exercises — can help you feel more in control.

Prevention

You can lower your risk by strengthening the muscles around your knee (especially your quadriceps and hamstrings), practicing good form during sports, and wearing appropriate footwear. Warming up before activity and cooling down afterward also help. But not all tears can be prevented, especially those from an accidental twist or fall.

Vaccines

There is no vaccine to prevent meniscus tears.

Screening programmes

There is no routine screening for meniscus tears. Most are discovered when you seek care for knee pain or an injury.

Complications

If left untreated

• Chronic knee pain that limits your daily activities
• Knee instability (feeling like the knee might give out)
• Development of osteoarthritis (wear-and-tear arthritis) in the knee joint over time

Long-term outlook

Most people with a meniscus tear get better with proper care. With rest, physical therapy, and sometimes surgery, you can return to your normal activities. Even if you develop arthritis later, staying active and managing your weight can keep your knee healthy for years. Your outlook depends on the severity of the tear and how well you follow your treatment plan.

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