The first thing that needs to be tried — and I mean properly tried — is physiotherapy. I want to be really clear about what that means, because most people who tell me physio didn’t work for them simply weren’t getting the right kind of treatment.

I’m not talking about being handed a sheet of exercises, and I’m not talking about massage. I’m talking about hands-on manual therapy from a physiotherapist who gets into the soft tissue around the knee, works on the joint’s range of movement, and genuinely knows what they’re doing with their hands. The difference that skilled manual therapy can make to pain and range of movement is, honestly, phenomenal — often almost instant — and I see it every week in my clinics.

That hands-on work needs to go hand in hand with the right rehabilitation exercises. The key detail here is that they need to be exercises that don’t compress the joint. Traditional squats and leg presses are often the wrong choice for an arthritic knee, and loading the joint in the wrong way can leave people convinced that “exercise makes it worse” when really it was the wrong exercise all along.

So here’s the honest test: if you haven’t had that combination of skilled manual therapy plus the right rehab, you haven’t truly given physiotherapy a fair go yet. And until you have, you can’t really say it hasn’t worked.

If you’ve been doing the right physio and you’re still struggling, the next step worth considering is injection therapy. For knee arthritis there are two main options, and they work quite differently.

The first is a steroid injection. This is good for reducing inflammation and buying a window of reduced pain. That window matters for more than just comfort — it also lets you get far more out of your physio, because a calmer, less painful joint responds better to the hands-on work and the exercises.

The second is hyaluronic acid. Rather than purely targeting inflammation, this works to lubricate the joint, helping it move more smoothly. It’s a different mechanism, and for some people it’s a better fit than a steroid.

The most important principle, though, is this: injections work best in conjunction with physio, not as a standalone fix. An injection that simply takes the edge off without any of the rehab work behind it is only ever a short-term answer. There’s also a right time and a wrong time to inject an arthritic knee, which is exactly why this should be explored with a doctor or physiotherapist who can judge your specific situation rather than treating it as a quick fix.

I want to share something here, because I think it puts everything above into perspective.

I have patients I’ve been treating who were told — seven or eight years ago — that they needed a new knee. They’re still going strong. They’re still active, the knee is no worse, and in many cases it’s actually better than it was back then. What kept them out of the operating theatre wasn’t luck. It was a genuine commitment to the right physio, topped up with an injection when they needed it, usually around once a year.

Now, I’m not saying everyone can avoid surgery — that simply wouldn’t be true. But it is proof that a diagnosis of bone-on-bone arthritis doesn’t have to mean a replacement is imminent or inevitable. For a great many people, there’s far more that can be done than they’re initially led to believe, and a well-managed knee can keep them living their life for years longer than they expected.

That’s really the heart of how to avoid knee replacement, or at least postpone it: consistent, skilled treatment over time, rather than a single intervention you try once and abandon.

So when does the conversation about a knee replacement become the right one? In my view, it’s when everything above has genuinely been tried and exhausted, and your basic quality of life is being seriously affected.

What does that actually look like in practice? It might be that you’re heavily reliant on painkillers just to get through the day. It might be that your mobility is declining despite your best efforts, or that the pain has started affecting your sleep, night after night. It may be that you’ve stopped doing the things that matter most to you — whether that’s walking, working, staying active with your family, or simply taking the dog out.

At that point, surgery stops being something to avoid and starts being something worth serious consideration. And it’s important to say: choosing surgery then is not a failure. It’s the right tool for the right moment — used once everything else has been given a proper, genuine chance first. A knee replacement done at the right time, for the right reasons, can be life-changing.

So before you book that consultation for a new knee, make sure you’ve had real hands-on manual therapy, make sure the rehab has been the right kind for an arthritic joint, and explore injection therapy properly with your doctor or physiotherapist. Give the alternatives a genuine shot. If you’ve done all of that and your quality of life is still suffering, then you’ll know you’re making the decision from a place of certainty rather than rushing into the biggest option first.

Every knee — and every person — is different, so it’s always worth getting an honest, individual assessment of where you stand before drawing any firm conclusions. But for a large number of people, the path to a comfortable, active life doesn’t run straight through the operating theatre. It’s worth finding out whether yours does too.

Joe Sharp
BSc (Hons) Physiotherapy