Assessing knee control during step-down movement.

A clicking knee is common during walking, squatting, stairs, sport, or exercise. A painless click is often harmless. Clicking with pain, swelling, locking, catching, or giving way may suggest irritation inside the knee joint.

This FAQ explains what knee clicking can mean, when to worry, and how physiotherapy may help. For broader causes and treatment options, see our Knee Pain Guide. You may also find Healthdirect Australia’s knee pain advice useful.

Is a Clicking Knee Dangerous?

A clicking knee is not usually dangerous if it is painless, brief, and not linked with swelling or instability. It becomes more important when the click is painful, the knee locks, or the joint feels weak, swollen, hot, or unreliable.

Knee noise can come from soft tissues moving, small pressure changes in joint fluid, kneecap tracking, cartilage irritation, or a meniscus tear. The pattern matters more than the sound alone.

What Causes a Clicking Knee?

Several issues can cause a clicking knee. Some are normal. Others suggest that the joint or nearby tissues need a closer look.

Harmless Joint Sounds

Tendons and soft tissues can move over bony points as the knee bends and straightens. Tiny gas bubbles in the joint fluid can also pop as pressure changes. These sounds are often painless and do not usually need treatment.

• No pain
• No swelling
• No locking
• No giving way
• No loss of movement

Meniscus Tears

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

• Painful clicking or catching along the joint line
• Swelling or stiffness
• Trouble fully straightening or bending the knee
• A stuck feeling or true locking

Mechanical symptoms can occur with a meniscus tear, but clicking alone does not prove a tear. A proper history, movement test, and examination help decide the likely cause.

Knee Arthritis and Crepitus

Crepitus means a grating, crackling, or crunchy feeling during movement. It may occur with knee osteoarthritis, but crepitus can also occur in people without major pain.

• Crunching during stairs, squats, or walking
• Stiffness after rest
• Pain that changes with load
• Reduced confidence with hills or stairs

If arthritis is suspected, management often focuses on strength, joint mobility, pacing, and activity confidence. Arthritis Australia provides helpful background on osteoarthritis.

Kneecap Tracking and Patellofemoral Pain

The kneecap should glide smoothly as the knee bends and straightens. If the kneecap is sensitive or overloaded, you may notice clicking, popping, grinding, or pain around the front of the knee.

Checking knee control during single-leg movement.

• Pain with 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

Useful related pages include Patellofemoral Pain Syndrome and Chondromalacia Patella.

When Should You Worry About a Clicking Knee?

You should worry more about a clicking knee when it changes how you move or comes with other symptoms. Pain, swelling, locking, catching, heat, trauma, or giving way make assessment more important.

• Clicking with pain, swelling, warmth, or redness
• Locking, catching, or a knee that feels stuck
• A feeling that the knee may give way
• Recent twist, fall, awkward landing, or sporting injury
• Clicking that steadily worsens or limits work, walking, stairs, or sport

Seek urgent medical advice after major trauma, a clear deformity, inability to bear weight, fever, severe swelling, or signs of infection.

Can Exercises Help Reduce Knee Clicking?

Exercises may help if knee clicking is linked with poor kneecap control, weak hip or thigh muscles, stiff joints, or a sudden change in training load. The right plan should match your symptoms, strength, sport, and daily tasks.

Guided knee strengthening for movement confidence.

A physiotherapist may recommend:

• Quadriceps and hip strengthening
• Hamstring and calf strength work
• Kneecap control and step-down drills
• Mobility exercises for stiff knees
• Load changes for walking, running, gym, or sport
• Technique advice for stairs, squats, and lunges

General physical activity advice is available from the Australian Department of Health, Disability and Ageing. If symptoms are linked with a sports injury, sports physiotherapy may also be useful.

How Can Physiotherapy Help a Clicking Knee?

Physiotherapy can help identify why your knee clicks and whether the pattern is likely harmless or linked with a treatable movement issue. Your physiotherapist can assess swelling, joint movement, kneecap control, strength, balance, and sport-specific tasks.

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

What Should You Do Next?

If your knee clicks without pain, swelling, locking, or instability, monitor it and keep active with sensible loading. If clicking is painful, persistent, new after injury, or limiting your sport or daily tasks, book a physiotherapy assessment.

Your physiotherapist can explain the likely cause, test the knee safely, and guide a plan matched to your goals.

Frequently Asked Questions About Knee Clicking

Why does my knee click when I move?

Your knee may click because soft tissues move over bone, joint pressure changes, or the kneecap glides slightly unevenly. If the click is painless and there is no swelling or locking, it is often not serious.

Should I be worried if my knee clicks but does not hurt?

Painless clicking is usually less concerning. Keep active and watch for changes. Book an assessment if the clicking becomes painful, swollen, unstable, or starts after a twist, fall, or new training load.

What does painful clicking in the knee mean?

Painful clicking can come from the meniscus, kneecap joint, cartilage, ligament injury, or irritated joint surfaces. The location, swelling, and movement pattern help guide the likely cause.

Can a meniscus tear cause knee clicking?

Yes. A meniscus tear can cause painful clicking, catching, locking, swelling, or trouble fully straightening the knee. Clicking alone does not confirm a tear, so assessment matters.

Can exercises stop knee clicking?

Exercises may reduce clicking when poor strength, kneecap control, stiffness, or training load contributes. A program often includes hip, thigh, calf, and step-control exercises.

When should I see a physiotherapist or doctor?

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

Related Information

• Knee Pain Guide – common knee pain causes, assessment, and treatment pathways.
• Meniscus Tear – painful clicking, catching, locking, and meniscus rehabilitation.
• Knee Osteoarthritis – crepitus, stiffness, and arthritis management.
• Patellofemoral Pain Syndrome – kneecap pain, tracking issues, and exercise care.
• Chondromalacia Patella – cartilage-related kneecap pain and clicking symptoms.
• Knee Treatment – physiotherapy options for knee pain and movement problems.
• Physiotherapy Brisbane – how physiotherapy may help knee symptoms and movement confidence.

References

1. Couch JL, King MG, De Oliveira Silva D, et al. Noisy knees – knee crepitus prevalence and association with structural pathology: a systematic review and meta-analysis. Br J Sports Med. 2025;59(2):126-132. doi:10.1136/bjsports-2024-108866
2. McHugh CG, Matzkin EG, Katz JN. Mechanical symptoms and meniscal tear: a reappraisal. Osteoarthritis Cartilage. 2022;30(2):178-183. doi:10.1016/j.joca.2021.09.009
3. Neal BS, Lack SD, Bartholomew C, Morrissey D. Best practice guide for patellofemoral pain based on synthesis of a systematic review, the patient voice and expert clinical reasoning. Br J Sports Med. 2024;58(24):1486-1495. doi:10.1136/bjsports-2024-108110
4. Mo L, Jiang B, Mei T, Zhou D. Exercise Therapy for Knee Osteoarthritis: A Systematic Review and Network Meta-analysis. Orthop J Sports Med. 2023;11(5):23259671231172773. doi:10.1177/23259671231172773