28th September 2026

Newsletter Monday

Hello Reader,

Recently, a reader asked me about having a steroid injection for what I think was a frozen shoulder. She’d heard the pros and cons and was still unsure whether to go ahead.

It’s a good question, because depending on who you talk to, you might think it’s a waste of time or the answer to your prayers.

When tablets haven’t helped, an injection can feel like a step up. There’s a needle, a skilled person wielding it, and possibly a stern-looking trolley of supplies.

Surely all that ceremony means it’s doing something more powerful?

Sometimes it helps, sometimes it doesn’t.

A more dramatic intervention isn’t necessarily a more curative one.

A steroid injection aims to reduce pain and inflammation. It doesn’t rebuild an arthritic knee or instantly release a frozen shoulder.

For an ongoing condition, it helps to know whether you’re being offered a chance of relief or being led to expect a fix.

So if your problem is a frozen shoulder, there is good reason to consider an injection into the shoulder joint, particularly when pain is a major problem.

​Current UK shoulder guidance says an injection can improve symptoms faster than waiting for the condition to run its course. Less pain may mean better sleep and an easier time using the arm or taking part in physiotherapy. Those aren’t consolation prizes when putting on a coat has become a daily wrestling match.

What it can’t promise is a shortcut to a completely recovered shoulder.

An arthritic knee is a different condition, but the distinction between relief and repair still matters. NICE says a steroid injection can be considered when other medicines haven’t helped or aren’t suitable, or to support exercise. It advises people to expect short-term relief, typically around two to ten weeks.

If I were hobbling around with a painful knee, the possibility of a few easier weeks might sound rather appealing. I might put my hand up for that injection.

I’d be less impressed if someone suggested my knee would emerge from the appointment with a new set of cartilage and a spring in its step.

Of course, an injection has downsides.

It can be uncomfortable, the pain may flare briefly afterwards, and blood sugar can rise for a few days if you have diabetes. Infection is rare but serious.

You may also have heard that you can “only have three or four.” There isn’t one magic lifetime number: clinicians often limit how frequently they inject the same area, and the advice varies with the joint and the circumstances.

Repeated injections are a different decision from trying one, especially if each one only buys a little relief.

There’s a doctor’s side to this, too.

As a GP, I like being able to offer practical treatment. When someone is in pain, it feels good to say, “There’s something we could try,” rather than ask them to wait, try another tablet and somehow keep going.

And yes, a clinic of practical procedures can be a welcome change from appointments where people need help I can’t provide nearly as quickly.

That doesn’t make injections wrong.

But it does make me wonder whether, as GPs, we can sometimes be a little too pleased to have one to offer.

The other complication is that our own experiences can be persuasive in both directions.

I’ve had patients whose first injection helped enormously. Naturally, when the pain returned, they hoped the second would work just as well, and were bitterly disappointed when it didn’t.

Someone who got nothing from the first one may have no appetite for another attempt.

I understand both responses.

But neither experience tells us how reliably an injection works for other people.

Symptoms fluctuate, expectations can influence how we experience pain, and no two patients are identical.

That’s why we need trials comparing groups of people, rather than declaring injections brilliant or useless based on whichever patient I saw last Tuesday.

So if you’re weighing one up, I’d ask:

What am I hoping this injection will let me do, and for how long might it help?

Sleep through the night? Move more comfortably? Take part in rehabilitation? Manage while waiting for other treatment?

If it helps you do those things, temporary relief can be well worth having.

Just don’t let the sight of a needle persuade you it comes with a guarantee of a cure.

Needles are impressive, but they are not tiny magic wands.