Knee locking, catching or giving way: meniscus tears and other causes
What a meniscus tear feels like, why a knee can lock, catch or give way, and the symptoms that need urgent assessment.
The menisci are two C-shaped pads of cartilage that cushion the knee. They can tear after a twisting injury, particularly in sports that involve cutting and pivoting, and can also wear and thin with age. A torn meniscus can cause pain, swelling, catching and sometimes locking, but not every click or catch is a tear.
When to get urgent help
Go to A&E or call 999 if you have any of these. They can be signs of a fracture, infection, blood clot or other emergency.
- A limb that looks deformed, or a joint that you cannot move or put weight on after an injury
- A cold, pale or numb foot or hand after injury
- A hot, red, swollen joint with a high temperature
- A painful, swollen, warm calf, with or without breathlessness or chest pain
What it can feel like
- Sharp or stabbing pain along the inner or outer joint line
- Swelling of the knee, often coming on over hours to a day after the injury
- Catching, locking, or a sense of giving way
- Difficulty fully straightening or bending the knee
Common contributors
- Twisting, cutting and pivoting movements, particularly in football, rugby and racket sports
- Meniscal tears often occur alongside ligament injuries such as the ACL
- Gradual wear of the meniscus with age, sometimes after minor movements
- Other causes of mechanical symptoms, including loose fragments or kneecap problems
General self-care
These are general comfort measures many people find reasonable. They are not a treatment plan, and what suits one person may not suit another.
- Reduce the load on the knee and avoid deep squatting or twisting while it is sore
- Use a cold pack wrapped in a towel for up to 20 minutes every two to three hours if the knee is sore or swollen
- Keep the knee moving within comfort, since stiffness can add to the problem
- Paracetamol or ibuprofen may help, if suitable for you. Check with a pharmacist
- Do not force a locked knee to straighten
When to see your GP
See your GP promptly, or call NHS 111, if you have any of the following:
- Pain after a significant injury, fall or twist
- Pain that is constant, severe or getting worse, or wakes you at night
- Unexplained weight loss, fever or feeling generally unwell with limb pain
Consider seeing your GP if:
- A knee that is locked and cannot straighten needs urgent assessment. Go to A&E or an urgent treatment centre
- Severe pain, an inability to put weight on the leg, or a badly swollen knee. The NHS advises contacting 111
- Persistent catching, swelling or giving way that is not settling, as you may need a scan or specialist opinion
Where an osteopath fits in
There is limited good-quality research showing that hands-on treatment changes the course of meniscus tears and mechanical knee symptoms, so I do not claim that osteopathy treats it.
What an osteopath can usefully do is assess the knee with specific clinical tests, decide whether you need an urgent medical review or imaging, and advise on activity and strengthening for the hip and thigh. Some meniscal problems improve with exercise and time, while a locked knee needs a surgical opinion. If the assessment suggests you need your GP, a physiotherapist or a specialist instead, I will tell you.
If you would like your symptoms assessed, you are welcome to book an appointment. Osteopathic care is not right for everyone, and if something needs medical attention first, I will tell you.
Common questions
What does a torn meniscus feel like?
An NHS referral guide lists sharp or stabbing pain along the joint line, locking or giving way, swelling and difficulty fully straightening or bending the knee, typically after a twisting or pivoting injury.
Does a locked knee need urgent treatment?
Yes. The referral guide advises urgent referral for a locked knee. Go to A&E or an urgent treatment centre rather than waiting for a routine appointment.
Sources and further reading
Links open in a new tab. Sources were checked in October 2026.
Related guides
This page is general information to help you understand common aches and pains. It is not medical advice and cannot diagnose your problem. If you are worried about your symptoms, please speak to your GP or call NHS 111.