Cortisone injection into a joint: six common questions

1. Does cortisone "eat" the joint?

Frequent, unmonitored repeat injections are not good for cartilage. That much is true.

But an injection given where it is indicated, with proper intervals, does not damage the joint in that sense.

That is exactly why the number of injections into one joint, and the gap between them, is decided for each patient separately.

2. How many can I have?

There is no universal number. It depends on the state of the joint, the response to previous injections, and the underlying disease.

If one joint needs repeat injections over a short period, that is a sign the underlying treatment needs reviewing.

3. I have diabetes — can I have one?

Diabetes is not an absolute contraindication. But a steroid can raise blood sugar for a few days.

This is discussed in advance, and you may be advised to check your sugar more often during those days.

4. Is the procedure painful?

You feel the needle going in and a sensation of pressure inside the joint. Many people compare it to having blood taken.

A temporary increase in pain over the first 24–48 hours is normal and settles on its own.

5. When is an injection postponed?

• Where infection is suspected in the joint or the skin over it
• Where there is sudden redness, severe pain and fever
• Where there is a bleeding tendency, or an unsuitable medicine is being taken

In those cases the cause is established first. Joint infection is treated in an entirely different way, not with an injection.

6. What should I do afterwards?

Do not load the joint that day, avoid long walks, and avoid sport.

If redness, swelling or fever develops at the injection site, contact the clinic straight away.

Once the pain eases, movement and exercise are helpful — that is what the injection is for.