Osteoarthritis is the most common form of arthritis. It develops when joint cartilage, bone, and nearby tissues change over time, which can cause pain, stiffness, swelling, and reduced movement. It often affects the knees, hips, feet, hands, and spine.

If you want a broader overview of arthritis, start there. If you want a more detailed condition guide, visit our main osteoarthritis page.

Osteoarthritis often builds gradually. However, symptoms can flare after joint overload, past injury, reduced activity, or changes in strength and mobility.

What causes osteoarthritis?

Osteoarthritis develops when a joint no longer handles load as well as it once did. Ageing, previous injury, repetitive stress, reduced muscle support, excess body weight, and genetics can all contribute to joint changes over time.

Although many people call it “wear and tear”, osteoarthritis is more complex than that. The cartilage, bone, joint lining, and surrounding muscles can all play a role. Some people show clear X-ray changes with very little pain, while others have significant symptoms with less obvious imaging findings.

How do you know if osteoarthritis is causing your pain?

Osteoarthritis is usually suspected from your symptoms, your joint movement, and how the area responds to loading. An X-ray can help confirm joint changes, but diagnosis should always match the full clinical picture.

A physiotherapist or doctor will usually ask about stiffness, swelling, function, activity limits, and aggravating tasks. They will also assess movement, strength, balance, and nearby joints. If symptoms suggest another condition, they may also consider problems such as rheumatoid arthritis, psoriatic arthritis, or ankylosing spondylitis.

For a broader consumer overview, Healthdirect explains osteoarthritis symptoms, diagnosis, and treatment.

Which joints does osteoarthritis affect most often?

Osteoarthritis most often affects the knees, hips, hands, feet, and spine. These joints deal with repeated load, daily movement, and age-related change.

Knee and hip osteoarthritis often affect walking, stairs, and exercise tolerance. Hand osteoarthritis can affect gripping and fine motor tasks. Spinal osteoarthritis may contribute to stiffness and painful movement. If your pain is more widespread or behaves differently, your clinician may also consider broader arthritis patterns.

If your main concern is a specific region, you may also find these pages helpful:
knee pain,
hip pain,
hand and wrist pain, or
back pain.

How is osteoarthritis treated?

Osteoarthritis treatment usually aims to reduce pain, improve movement, build strength, and help you stay active. Most people improve with a combination of education, exercise, load management, and symptom relief strategies.

Research supports exercise therapy as a key part of osteoarthritis care, especially for hip and knee osteoarthritis. The right program can help improve pain, function, confidence, and day-to-day tolerance.

Physiotherapy often focuses on joint mobility, muscle strength, balance, walking tolerance, and confidence with daily activities. Treatment may also include pacing, temporary activity modification, footwear advice, and weight management support where relevant.

Some people also benefit from medication or injections through their doctor. Surgery is usually reserved for more advanced or persistent cases that do not respond well to conservative care.

Can physiotherapy help osteoarthritis?

Physiotherapy may help osteoarthritis by improving joint movement, muscle support, walking confidence, and activity tolerance. It can also help you decide which activities to keep doing, which to modify, and how to progress safely.

If you have ongoing joint pain, a tailored program is usually more useful than complete rest. Our Rheumatology Physiotherapy service may also help if arthritis symptoms are affecting your daily life, work, or exercise.

When should you seek help for osteoarthritis?

You should seek help if joint pain, swelling, stiffness, or reduced movement is limiting your walking, sleep, work, sport, or usual daily activities. Early guidance may help you stay more active and comfortable.

Prompt assessment is especially important if the joint is hot, very swollen, suddenly much worse, locking, giving way, or linked with fever or unexplained weight loss. These features may suggest something other than straightforward osteoarthritis.

What to do next

If you think osteoarthritis may be affecting you, the next step is to get the joint properly assessed and match treatment to your symptoms, goals, and daily load. Good care is not just about what an X-ray shows. It is about helping you move better, feel more confident, and function more comfortably.

You can also explore related topics such as fibromyalgia, lupus, and our main osteoarthritis guide if you want more detail before booking.

Frequently asked questions about osteoarthritis

Is osteoarthritis the same as normal ageing?

No. Age increases the chance of osteoarthritis, but it is not simply a normal or inevitable part of ageing. Previous injuries, loading history, muscle weakness, body weight, and genetics can all influence whether symptoms develop.

Does an X-ray always match how much pain you feel?

No. Some people have clear osteoarthritis changes on X-ray with little pain, while others have more pain than their scan suggests. That is why symptoms, function, and clinical assessment matter as much as imaging.

Should you stop exercising if you have osteoarthritis?

Usually no. Complete rest often leads to more stiffness, weakness, and reduced confidence. A better approach is to modify exercise, manage flare-ups, and gradually rebuild strength and tolerance with the right advice.

Can osteoarthritis affect younger adults?

Yes. Osteoarthritis is more common with age, but younger adults can develop it, especially after joint injuries, repeated high loads, surgery, or longstanding biomechanical issues.

Can physiotherapy help if your osteoarthritis is advanced?

Yes, in many cases. Physiotherapy may still help improve strength, mobility, pacing, walking tolerance, and day-to-day function. It can also help prepare you for surgery or support recovery afterwards if surgery becomes necessary.

More arthritis information

• What is Arthritis?
• Rheumatology Physiotherapy
• Osteoarthritis
• Ankylosing Spondylitis
• Fibromyalgia
• Lupus
• Psoriatic Arthritis
• Rheumatoid Arthritis

References

1. Marriott KA, Williams AMM, North JB, et al. Are the Effects of Resistance Exercise on Pain and Physical Function in People With Knee and Hip Osteoarthritis Different Within 3 Months, 3 to 6 Months, and Over 6 Months? A Systematic Review With Meta-Analysis. Arthritis Care Res (Hoboken). 2024;76(8):1324-1335.
2. Varongot-Reille C, Gálvez-Romero JL, Martín-Saborido C, et al. Effectiveness of exercise on pain intensity and physical function in patients with osteoarthritis: a meta-meta-analysis. Osteoarthritis Cartilage Open. 2024;6(1):100438.
3. Mao Y, Lin Q, Zhu Y, et al. Efficacy of home-based exercise in the treatment of pain and disability related to knee and hip osteoarthritis: a systematic review and meta-analysis. BMC Musculoskelet Disord. 2024;25:561.
4. Felson DT. A clinician's perspective on the role of imaging in knee osteoarthritis in clinical practice. Curr Opin Rheumatol. 2023;35(2):90-96.

What does arthritis in the knee feel like? For many people, knee arthritis feels like an achy, stiff, or swollen knee that becomes more noticeable with walking, stairs, squatting, or getting up after sitting. Symptoms often build gradually, although flare-ups can make the joint feel puffy, tight, warm, and less reliable day to day.

This FAQ supports our broader guides to knee pain and arthritis. While many people blame age alone, a clear diagnosis can help explain why your knee hurts and what may help you move with more confidence.

Common Signs That Your Knee Pain May Be Arthritis

• pain that feels achy or deep in the joint
• morning stiffness or stiffness after rest
• swelling or a feeling of fullness around the knee
• clicking, crunching, or grinding sensations
• pain with stairs, walking, kneeling, or getting out of a chair
• reduced trust in the knee, including occasional buckling

What Does Arthritis in the Knee Feel Like When It Starts?

Early knee arthritis often feels like stiffness, mild swelling, or an ache that is worse after inactivity and settles once you get moving. Some people first notice it during stairs, hills, longer walks, or after sitting for too long. Others mainly notice reduced knee flexibility or a swollen, “full” joint.

Why Knee Arthritis Can Feel Stiff, Swollen, or Noisy

Arthritic knees often become painful because the joint is irritated and less tolerant of load. That can lead to swelling, stiffness, muscle guarding, and discomfort during everyday movement. As the joint surfaces change over time, some people also notice clicking, popping, or a rougher feeling through range.

Morning stiffness is common, especially if your knee has been still for hours. However, stiffness from knee osteoarthritis is usually shorter-lasting than the prolonged morning stiffness seen with some inflammatory joint conditions. A physiotherapist may also compare your symptoms with other knee problems such as patellofemoral pain syndrome or other causes of front-of-knee pain.

What Activities Commonly Aggravate Knee Arthritis?

Knee arthritis symptoms often flare when the joint is exposed to repeated or heavier load than it currently tolerates. Common triggers include walking longer distances, hills, stairs, squatting, kneeling, twisting, gardening, and getting up and down from chairs or cars.

That does not mean you should stop moving. In fact, many people do better with the right type and dose of activity. Programmes that build strength, confidence, and walking tolerance can be useful, especially when combined with education and pacing. Our knee treatment, knee exercises, and GLA:D® Australia Program pages explain this in more detail.

For broader Australian consumer guidance, see healthdirect’s osteoarthritis overview.

Does Knee Arthritis Always Feel the Same?

No. Symptoms can vary from day to day. Some people mainly notice stiffness and swelling. Others notice aching with activity, pain after longer walks, or a knee that feels less trustworthy on stairs. Flare-ups can happen after overload, but symptoms may also settle again with sensible activity modification and rehabilitation.

If your symptoms are gradually worsening, it can help to compare them with our knee pain FAQs and joint pain relief guide.

When Should You Get Knee Pain Checked?

You should arrange an assessment if your knee is repeatedly swelling, becoming harder to straighten or bend, limiting walking, disturbing sleep, or making you lose confidence with daily tasks. It is also worth getting checked if you are not sure whether the pain is arthritis, a sports injury, or another problem inside the knee.

Urgent medical review is more important if the joint is very hot, very swollen, badly deformed, or you cannot take weight through it. If symptoms become severe and conservative care no longer helps enough, your doctor may discuss options such as knee replacement.

Related Knee Pain Guides

• Knee Arthritis
• Knee Pain: Causes, Relief, Physio & Prevention
• Knee Treatment
• Knee Exercises
• Knee Pain FAQs

Frequently Asked Questions

Does knee arthritis always hurt all day?

Not usually. Many people feel worse after inactivity, with stairs, or after a bigger day on their feet. Symptoms often fluctuate, so some days feel manageable while others feel stiff, swollen, or more painful.

Can knee arthritis cause clicking or popping?

Yes. Knee arthritis can cause clicking, crunching, or popping sensations, especially when the joint surfaces become rougher. However, not every knee noise means arthritis, so the full symptom pattern still matters.

Is morning stiffness a sign of knee arthritis?

It can be. Morning stiffness or stiffness after sitting is common with knee arthritis. Many people feel better once they start moving, although the knee may still ache later if it is overloaded.

Does walking help knee arthritis?

Walking can help when the dose suits your current tolerance. Shorter, regular walks are often better than one long walk that flares the joint. A graded exercise plan may help build tolerance safely.

Can physiotherapy help knee arthritis?

Physiotherapy may help by improving strength, movement confidence, joint tolerance, and flare-up management. A physiotherapist can also help you work out whether arthritis is the main driver of your pain or whether another knee condition is involved.

What to Do Next

If your symptoms match arthritis in the knee, the next step is to have the joint assessed properly and work out what is driving your pain, swelling, or stiffness. That usually helps separate arthritis from other knee problems and gives you a clearer management plan.

A physiotherapist may recommend load modification, strengthening, mobility work, education, and a gradual return to walking or exercise that matches your current capacity.

References

1. Lawford BJ, Harris IA, Sharma L, et al. Exercise for osteoarthritis of the knee. Cochrane Database Syst Rev. 2024;12(12):CD004376. doi:10.1002/14651858.CD004376.pub4
2. Whitfield M, Tomlinson OW. Optimal exercise modalities and doses for therapeutic management of osteoarthritis of the knee. Front Aging. 2025;6:1458983. doi:10.3389/fragi.2025.1458983
3. King LK, Young JJ, Gronne DT, et al. GLA:D to Be Walking Better: Change in Self-Reported Difficulty Walking After Exercise Therapy and Education in Persons With Knee Osteoarthritis. J Rheumatol. 2024;51(10):1033-1038. doi:10.3899/jrheum.2023-1213
4. Duong V, Oo WM, Ding C, et al. Evaluation and Treatment of Knee Pain: A Review. JAMA. 2023;330(16):1568-1580. doi:10.1001/jama.2023.19675

How Do I Know If I Need an MRI on My Knee?

Many people ask whether they need a knee MRI after pain, swelling, a twist, or a sports injury. While MRI scans can provide detailed images of the knee joint, they are not always the first or most useful step. In many situations, a physiotherapist or doctor can identify the likely cause through a structured clinical assessment. For a broader overview of knee injuries, diagnosis, and treatment pathways, visit our Knee Pain & Injury guide.

Firstly, clinicians usually assess how the injury happened, whether the knee feels unstable, whether it locks or gives way, and which movements reproduce symptoms. Combined with physical tests and your medical history, this information often provides enough detail to guide treatment and decide whether imaging is likely to change management.

Short Answer

Most people with knee pain do not require an immediate MRI. Healthcare providers usually begin with a clinical assessment to determine the likely source of symptoms and whether simpler imaging such as an X-ray is more appropriate. A knee MRI may be recommended if the diagnosis remains unclear, if a significant structural injury is suspected, or if symptoms are not improving as expected. For a full overview of common knee conditions and management options, see our Knee Pain & Injury page.

Common Reasons a Knee MRI May Be Recommended

An MRI scan provides detailed images of soft tissues such as ligaments, cartilage, tendons, and menisci. A clinician may consider this test if they suspect an injury that could change your treatment plan or prompt referral for further opinion.

Examples include:

• Possible ACL injury after a twisting incident, pop, or fast swelling
• A suspected meniscus tear causing locking, catching, or sharp joint-line pain
• Persistent knee instability or repeated giving way
• Complex trauma involving more than one structure
• Symptoms that fail to improve with appropriate rehabilitation and load management

In these situations, imaging may help confirm the diagnosis and assist decisions about rehabilitation, specialist review, or whether surgery should even be discussed.

When a Knee MRI May Not Be Necessary

For many knee problems, a careful physical examination provides enough information to begin treatment safely. Conditions such as Patellofemoral Pain Syndrome (PFPS), mild ligament sprains, patellar tendinopathy, and some overload-related knee pain patterns can often be diagnosed clinically.

Additionally, MRI findings do not always match symptoms. A scan may show age-related or incidental changes that are not the real reason for your pain. Therefore, ordering an MRI too early can sometimes create confusion rather than clarity.

When X-Rays May Be More Appropriate

After trauma, clinicians often consider plain radiographs, also known as X-rays, before MRI. X-rays are more useful for ruling out fractures, major bony injury, and some joint changes.

Many clinicians use the Ottawa Knee Rules to help decide whether an X-ray is needed after an acute knee injury. These rules look at factors such as age, tenderness over key areas, and whether you can bear weight. If a fracture is unlikely and the knee is clinically stable, an MRI may not be needed straight away.

What Symptoms Make Assessment More Important?

If your knee feels unstable, repeatedly gives way, locks, stays very swollen, or fails to improve after a few weeks of appropriate care, a physiotherapy or medical assessment becomes more important.

A clinician will usually evaluate:

• How the injury occurred
• Joint stability and ligament integrity
• Range of motion and swelling
• Pain location, including whether symptoms fit a knee ligament injury or cartilage problem
• Functional tasks such as walking, stairs, squatting, pivoting, or sport-specific movements

This assessment helps determine whether imaging such as MRI, ultrasound, or X-ray may add useful information.

Activity and Load Also Matter

The need for imaging can also depend on what you need your knee to do. A person who wants to return to pivoting sport, heavy work, or rapid direction change may need a different pathway from someone with mild pain during walking or stairs.

For example, if your symptoms are more consistent with a broader knee sports injury pattern, your clinician may weigh up MRI sooner than they would for a simple flare-up of overuse pain. On the other hand, if the problem appears mechanical but stable, a period of treatment may be more sensible before scanning.

What This Means for You

If you have knee pain, the first step is usually a thorough clinical assessment rather than immediate imaging. Many knee injuries improve with targeted rehabilitation, sensible activity modification, and gradual strengthening.

However, if symptoms persist, worsen, or involve instability, locking, major swelling, or difficulty weight-bearing, further investigation may be appropriate. A physiotherapist or doctor can help decide whether a knee MRI is likely to clarify the diagnosis and guide the next stage of recovery.

Related Information

• Knee Pain & Injury
• Knee Sports Injury
• ACL Injury
• Meniscus Tear
• Patellofemoral Pain Syndrome (PFPS)
• Patellar Tendinopathy
• Physiotherapy

References

1. Stiell IG, Greenberg GH, Wells GA, McDowell I, Cwinn AA, Smith NA, et al. Prospective validation of a decision rule for the use of radiography in acute knee injuries. JAMA. 1996;275(8):611-615. Available from: https://pubmed.ncbi.nlm.nih.gov/8594242/
2. Petron DJ, Greis PE, Aoki SK, Wills BP, Jones DL, Jacobs CA, et al. Use of knee magnetic resonance imaging by primary care physicians in patients aged 40 years and older. Sports Health. 2012;4(5):385-390. Available from: https://pubmed.ncbi.nlm.nih.gov/23015964/
3. Duong V, Oo WM, Ding C, Culvenor AG, Vicenzino B, Hunter DJ. Evaluation and treatment of knee pain: a review. JAMA. 2023;330(16):1568-1580. Available from: https://pubmed.ncbi.nlm.nih.gov/37874571/

For research summaries and management pathways, visit our main condition page: Knee Pain & Injury

Walking Tips for Knee Pain

Walking with knee pain can feel confusing, especially when you are searching for reliable walking tips for knee pain. Some people worry that walking will worsen their symptoms, while others are unsure how much activity is safe. In many cases, walking can remain part of daily life when managed carefully. For a broader explanation of causes, symptoms, and treatment options, see our main knee pain page.

Short Answer

Many people with knee pain can continue walking, provided the activity does not increase pain or swelling during or after the walk. Short, controlled walks on flat ground are often better tolerated than long or uneven routes. If pain persists, worsens, or limits daily function, a physiotherapy assessment can help clarify the cause and guide safe activity levels. Learn more about assessment options on our knee pain page.

Common Reasons Walking Triggers Knee Pain

Knee pain during walking can occur for several reasons. Joint irritation, muscle weakness, tendon overload, or altered movement patterns may all contribute. Pain may appear suddenly after injury or develop gradually with changes in activity, footwear, or terrain.

When Walking Is Usually Safe

If knee pain is mild and settles quickly after walking, gentle activity may help maintain strength and joint movement. Many people find that walking shorter distances at a comfortable pace allows them to stay active without aggravating symptoms.

When Walking May Need Modification

Walking may need to be reduced or adjusted if pain increases during the walk, swelling develops later in the day, or symptoms persist into the following morning. Hills, stairs, uneven ground, and fast pacing often increase knee load and may need temporary avoidance.

Practical Walking Tips for Knee Pain

• Start with short walks and increase gradually.
• Choose flat, even surfaces where possible.
• Keep walking routes close to home.
• Monitor pain and swelling after each walk.
• Consider supportive footwear or walking aids if advised.

Walking Tips for Knee Pain During Daily Activities

These walking tips for knee pain apply to everyday situations such as shopping, commuting, and casual exercise. Many people find that breaking walking into shorter bouts throughout the day reduces irritation while maintaining confidence and movement.

When using walking tips for knee pain, consistency matters more than distance. Walking little and often, rather than pushing through long sessions, may help manage symptoms while keeping joints mobile. Pay attention to surfaces, footwear, and pacing, especially during longer days on your feet.

How Long Should You Walk With Knee Pain?

There is no single rule for how long you should walk when following walking tips for knee pain. A practical guide is to finish your walk feeling similar or only slightly more uncomfortable than when you started, with symptoms settling within 24 hours.

If pain increases later in the day or the following morning, walking volume may need adjustment. These walking tips for knee pain often work best when combined with gradual progression and guidance from a physiotherapist, particularly if symptoms have been present for several weeks.

What This Means for You

Walking does not automatically need to stop because of knee pain. The key is matching your walking level to your current capacity. If pain limits confidence, comfort, or daily tasks, a physiotherapist can assess contributing factors and guide safe progression without unnecessary flare-ups.

Related Information

• Knee Pain – Causes, Assessment & Treatment
• Knee Pain on Stairs
• What Can Help Relieve Knee Pain?
• Knee Pain FAQs