Why Does My Knee Click When I Move?

Assessing knee control during a step-down movement.

A painless clicking knee is usually not a sign of serious damage. Knee clicks can come from normal tendon movement, kneecap movement or pressure changes inside the joint. Seek assessment when clicking occurs with pain, swelling, locking, catching, giving way or a recent injury.

This guide explains the common causes of knee clicking, warning signs to watch for and when exercises or physiotherapy may help. For a broader overview, visit our Knee Pain Guide. You can also read Healthdirect Australia’s knee pain advice.

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Quick Guide: What Does Knee Clicking Mean?

Painless clicking: often comes from normal joint or tendon movement.
Painful clicking: may involve the kneecap, meniscus, cartilage or another irritated structure.
Locking or catching: needs assessment, particularly after a twist, fall or sporting injury.
Grinding or crunching: may occur with kneecap irritation or knee osteoarthritis.
Clicking with swelling or giving way: should not be ignored.

Is a Clicking Knee Dangerous?

A clicking knee is usually not concerning when the sound is painless, brief and not linked with swelling, weakness or reduced movement. Many healthy knees make occasional clicking, popping or cracking sounds.

Clicking becomes more important when the knee also hurts, swells, locks, catches or feels unreliable. The pattern of symptoms matters more than the sound itself.

What Causes a Clicking Knee?

Knee noise may come from normal soft-tissue movement, pressure changes inside the joint or irritation of structures such as the kneecap or meniscus. An assessment considers where you feel the click, which movement causes it and whether other symptoms occur.

Normal Joint and Tendon Sounds

Tendons and other soft tissues can move over bony points as your knee bends and straightens. Pressure changes within the joint fluid may also create a popping sound.

This type of clicking is often harmless when you have:

No pain
No swelling
No locking or catching
No giving way
No loss of movement

Meniscus Injury

The meniscus is a C-shaped cartilage pad that helps cushion and guide the knee. A meniscus tear may follow a twist, deep squat or awkward landing. It can also develop gradually as the joint changes with age.

Possible meniscus symptoms include:

Painful clicking or catching near the knee joint line
Swelling or stiffness
Difficulty fully straightening or bending the knee
A stuck feeling or true locking

Clicking alone does not confirm a meniscus tear. Your history, swelling pattern, movement and physical examination help determine the likely cause.

Knee Arthritis and Crepitus

Crepitus describes a grating, crackling or crunchy feeling during movement. It can occur with knee osteoarthritis, but it may also occur in people who have little or no pain.

An arthritis-related pattern may include:

Crunching during stairs, squats or walking
Stiffness after sitting or resting
Pain that changes with activity levels
Reduced confidence on hills or stairs

Management commonly focuses on strength, movement, pacing and maintaining useful physical activity. Arthritis Australia provides further information about osteoarthritis.

Kneecap Tracking and Patellofemoral Pain

The kneecap glides over the end of the thigh bone as the knee bends and straightens. If this joint becomes sensitive or overloaded, you may notice clicking, popping, grinding or pain around the front of the knee.

Clicking knee single-leg squat assessment checking kneecap and thigh movement control

Checking kneecap and thigh control during single-leg movement.

A kneecap-related pattern may include:

Pain during stairs, squats, hills or running
Clicking behind or around the kneecap
Pain after sitting with the knee bent
Reduced control during step-downs or single-leg tasks

Read more about Patellofemoral Pain Syndrome and Chondromalacia Patella.

What Does Your Clicking Pattern Suggest?

The following guide does not diagnose the cause. However, it can help you decide whether monitoring or assessment is the more sensible next step.

Painless, Brief Click

What it may mean: Normal joint pressure change or soft-tissue movement.

Next step: Stay active and monitor for pain, swelling or instability.

Clicking With Swelling

What it may mean: Joint irritation or an injury inside the knee.

Next step: Reduce aggravating load and arrange an assessment.

Catching or Locking

What it may mean: A possible meniscus injury or another mechanical joint problem.

Next step: Seek professional advice, especially if the knee becomes stuck.

Grinding With Stairs

What it may mean: Kneecap irritation, reduced load tolerance or an arthritis pattern.

Next step: Review strength, movement and activity load.

Clicking After a Twist, Fall or Landing

What it may mean: A recent knee injury involving the meniscus, ligament, cartilage or another joint structure.

Next step: Arrange an early assessment, particularly if swelling, limping or giving way develops.

When Should You Worry About a Clicking Knee?

Arrange an assessment when clicking changes how you walk, exercise or use the knee. Pain, swelling, locking, catching or giving way make an examination more important.

Book a physiotherapy or medical review if you notice:

Clicking with pain or swelling
Warmth or redness around the joint
Locking, catching or a knee that feels stuck
A feeling that the knee may give way
A recent twist, fall, tackle or awkward landing
Symptoms that steadily worsen
Difficulty with walking, stairs, work, gym or sport

Seek Prompt Medical Care

Seek prompt medical advice after major trauma, a visible deformity, inability to bear weight, severe swelling, fever, a hot red joint or other signs of infection.

Can Exercises Help Reduce Knee Clicking?

Exercises may help when knee clicking is linked with reduced strength, poor kneecap control, stiffness or a sudden increase in activity. The program should match your symptoms, goals and current capacity.

Clicking knee step-up rehabilitation building knee strength and movement confidence

Guided knee strengthening can improve control and movement confidence.

A physiotherapy exercise program may include:

Quadriceps and hip strengthening
Hamstring and calf strengthening
Step-up and step-down control exercises
Single-leg balance and movement drills
Mobility exercises for a stiff knee
Gradual changes to walking, running, gym or sporting load
Technique guidance for squats, lunges and stairs

General activity guidance is available from the Australian Government physical activity resources. People returning to sport may also benefit from a structured sports physiotherapy plan.

Should You Keep Exercising?

Continue gently when clicking is painless and the knee feels stable.
Reduce the load when clicking becomes painful during stairs, squats, running or gym work.
Stop and arrange an assessment if the knee locks, gives way, swells or feels unsafe.
Build up gradually as pain, strength and movement improve.

What About Clicking After Knee Surgery?

Clicking can occur after knee surgery as swelling, strength and movement patterns change. Some noises settle as rehabilitation progresses.

Ask your surgeon or physiotherapist about new clicking that is painful, worsening or linked with swelling, locking, giving way or reduced movement. Follow your specific post-operative restrictions rather than using general exercise advice.

How Can Physiotherapy Help a Clicking Knee?

A physiotherapist can assess whether your knee clicking appears harmless or is linked with a movement, strength or joint problem. The assessment may include swelling, joint movement, kneecap control, muscle strength, balance and the tasks that reproduce your symptoms.

Management may include education, exercise rehabilitation, taping, bracing advice, load planning, gait or running guidance and referral for imaging or medical review when needed. Learn more about the broader pathway on our Physiotherapy Brisbane page.

Frequently Asked Questions About Knee Clicking

Why does my knee click when I move?

Your knee may click because soft tissues move over bone, pressure changes occur inside the joint or the kneecap moves across the thigh bone. If the clicking is painless and there is no swelling, locking or instability, it is often not serious.

Should I worry if my knee clicks but does not hurt?

Painless clicking is usually less concerning. Keep active and monitor the knee. Arrange an assessment if the clicking becomes painful, swollen, unstable or begins after an injury or sudden change in training.

What does painful clicking in the knee mean?

Painful clicking may come from the kneecap joint, meniscus, cartilage or another irritated structure. The location of pain, swelling pattern and movement that causes the click help guide the likely cause.

Can a meniscus tear cause knee clicking?

Yes. A meniscus tear can cause painful clicking, catching, swelling, locking or difficulty fully straightening the knee. However, clicking alone does not confirm a meniscus tear.

Can exercises stop knee clicking?

Exercises may reduce clicking when strength, kneecap control, stiffness or activity load contributes. A program may include hip, thigh, calf and step-control exercises. Harmless joint noise may remain even when the knee is healthy and strong.

When should I see a physiotherapist or doctor?

Seek advice when clicking is painful, swollen, locking, giving way, worsening or linked with trauma. An assessment can clarify whether you need exercise rehabilitation, load changes, imaging or medical review.

What Should You Do Next?

If your knee clicks without pain, swelling, locking or instability, continue sensible activity and monitor it. You do not need to stop exercise because of noise alone.

If the clicking is painful, persistent, follows an injury or limits walking, work, stairs, gym or sport, book a physiotherapy assessment. Your physiotherapist can identify the likely cause and guide a plan matched to your goals.