Knee Osteoarthritis

Understanding the knee

Knee osteoarthritis affects the joint surfaces between the thighbone, shinbone and kneecap. The cartilage covering these surfaces becomes damaged, with changes in the surrounding bone and other joint tissues. Pain, stiffness and difficulty with everyday movement can follow. The diagnosis does not, by itself, decide whether an operation is needed. AAOS explains knee arthritis.

Think about what you would like an assessment to help you do: walk to a nearby shop, manage stairs at home, stand for work or sleep more comfortably. These are useful starting points for a treatment conversation. A photograph of an X-ray cannot describe those priorities, and another person’s experience cannot tell you which option fits your circumstances.

Symptoms and causes

Common features include pain with walking or stairs, stiffness after resting, swelling and reduced movement. Symptoms may fluctuate. Increasing age, previous injury and excess body weight can contribute; osteoarthritis is different from inflammatory arthritis. A new symptom should not automatically be attributed to an old diagnosis. AAOS overview.

Before a visit, make a short record of where the pain is, how long it has been present and which tasks bring it on. Describe any catching, true locking, falls or episodes of giving way in your own words. For example, being reluctant to straighten because it hurts is worth describing separately from a knee that physically will not straighten. You do not need to choose the correct medical label beforehand.

How it is evaluated

Assessment combines your history and examination. X-rays can show joint-space and bone changes. MRI is not a routine requirement for every arthritic knee; other tests may be used when a different cause is suspected. Infection, gout or another arthritis may require a different investigation pathway. NIAMS describes diagnosis.

Bring previous images as well as reports, a current medicine list and a note of treatments already tried. Include the length of each trial and what changed: less night pain, easier stair climbing, no benefit or a side effect. If you have had an injection elsewhere, record its name and date if available. This avoids turning the consultation into a series of guesses about earlier care.

Ask the clinician to connect each proposed test to a decision. Useful questions are: what are we trying to confirm, could another problem explain this pain, and would the result change the next step? If several joints are painful, mention that rather than focusing only on the worst knee.

Treatment without surgery

Education, exercise and a sustainable approach to weight management, when relevant, are central options. A physiotherapist can adapt strengthening, flexibility and low-impact activity to your starting ability. A correctly fitted walking aid or selected brace may help some people. These options can support function even though they do not replace lost cartilage. NIAMS treatment guidance.

Pain medicines need an individual safety discussion. Topical or oral anti-inflammatory medicines are possible options, but suitability depends on other illnesses and medicines. An injection may offer temporary relief in selected circumstances. Ask about likely benefit, limitations and adverse effects rather than assuming that a stronger treatment is automatically a better treatment. NHS treatment guidance.

A workable plan should say which activity to start, how it will be progressed and when it will be reviewed. Tell the team if travelling to physiotherapy is difficult or if your job involves prolonged standing. Ask for written instructions that match the equipment and space you actually have. You should be able to explain the plan back in everyday language before leaving.

When surgery is discussed

Knee replacement may be considered when pain and loss of function remain substantial despite appropriate non-surgical treatment. The conversation should include alternatives, expected limitations and risks such as infection, blood clots, stiffness and persistent pain. No operation guarantees a particular outcome. AAOS treatment overview.

Ask what improvement is realistic for your main goal, what makes you a suitable candidate and what would happen if you continued non-surgical care for now. Also ask about support at home, follow-up visits, rehabilitation and total costs. A decision made with those details is more useful than a promise to be “back to normal” on a fixed date. See the knee replacement guide for a fuller decision checklist.

Recovery and living with symptoms

Osteoarthritis care is usually ongoing. Treatment can improve symptoms and participation, but response varies and a plan may need adjustment. After surgery, recovery also depends on the procedure, health and rehabilitation. A calendar alone cannot confirm readiness for every activity. NHS overview of support.

Choose two or three ordinary activities to discuss at follow-up. You might record whether you can complete a shopping trip, how often sleep is interrupted and whether you need help rising from a chair. Include what remains difficult. Avoid comparing yourself only with someone who had a different operation or whose work and home demands differ from yours.

When to seek urgent care

A very painful or suddenly swollen knee, inability to bear weight, locking, a change in shape, or a hot red knee with fever needs urgent medical assessment. Do not assume this is an ordinary arthritis flare. NHS warning signs.

Use urgent local medical services for these symptoms rather than waiting for a website appointment or a WhatsApp reply. For a routine consultation, bring your questions and records; you do not need to have decided about surgery before asking for help.

Preparing for a shared decision

If relatives have strong opinions about replacement, consider writing down your own preferred outcome before the visit. Ask them to help you remember the discussion rather than decide for you. Request an explanation of any recommendation you do not understand, including why a treatment is suitable now and how you would know if it was time to consider a different option. Keep a copy of the agreed plan.