A steroid injection does not fix anything.
It buys you a WINDOW of reduced pain and swelling, and what you do inside that window decides whether the problem comes back.
That framing changes the decision. The question is not “should I have an injection.” It is “what am I going to do with the six weeks it gives me.”
What it actually does
Corticosteroid is a powerful anti-inflammatory delivered directly to the irritated tissue. It reduces swelling inside a tight space, which is why it works so well where the problem IS the tightness.
Pain relief usually starts between two and seven days. Some people get a flare of worse pain for the first 24 to 48 hours before it improves, which catches people out badly if nobody warned them.
Where it works well
- Trigger finger — one of the best responses anywhere in the body. Many people need nothing further
- De Quervain’s — particularly good, especially combined with a thumb splint
- Carpal tunnel — reliable relief, but usually temporary. Useful as a diagnostic test and to get through a pregnancy or a deadline
- Thumb base arthritis — variable, sometimes months of relief
- Ganglia and mucous cysts, with a meaningful recurrence rate
Where it works badly
- Tennis elbow. Excellent at six weeks, and by twelve months the injected group often does WORSE than the group that did nothing. This is one of the better-replicated findings in tendon medicine and it is still routinely ignored
- Degenerative tendon problems generally, where there is little inflammation to suppress
- Any nerve compression caused by bone rather than swelling
An injection into a tendon that is failing structurally treats the alarm, not the fire.
The first injection is a reasonable trial. The second is a decision. The third is a conversation about whether this is the right treatment at all.
So how many is too many?
There is no magic number, and anyone who gives you one confidently is simplifying.
The practical framework most hand surgeons work to:
- Leave at least three months between injections into the same site
- Two or three in the same place is where most clinicians start getting cautious
- If relief is getting shorter each time — six months, then three, then six weeks — the injection has told you what it can. That pattern is a message
- If the first two did nothing, a third is unlikely to be different
The risks, stated plainly
- Skin changes. A pale patch or a dent of thinned fat at the injection site. More visible on darker skin, often permanent, cosmetic rather than dangerous
- Blood sugar rise for several days. If you have diabetes, expect it and plan for it — see the diabetic hand
- Tendon weakening with repeated injections into or near a tendon. Rupture is rare but real
- Infection. Uncommon. Increasing pain, redness and heat after day three is not the normal flare — get it checked
- Post-injection flare in the first 48 hours, which is normal and self-limiting
Using the window properly
This is the part that gets skipped, and it is the part that determines whether you are back in six months.
- Do not go back to full load because it stopped hurting. Pain was the brake. You have just had the brake removed, not the problem repaired
- Splint alongside it where relevant. Injection plus splint beats injection alone for De Quervain’s — see which splint
- Load it progressively during the pain-free window, so the tissue is stronger when the steroid wears off
- Change the thing that caused it. If nothing about your week changes, neither does the outcome
The patients who get one injection and never need another are almost always the ones who changed something in the six weeks afterwards.
Questions worth asking before you agree
- What are you injecting, and is it guided by ultrasound?
- How long does relief typically last for this condition?
- What should I do differently during the good weeks?
- If this one doesn’t hold, what is the next step — and is that step still open to me?
An injection that buys you time you don’t use is an injection you will need again.
If you are weighing this against an operation, see hand therapy or surgery.
Every article on this site is written using the Closing Window Method: name the window your condition runs on, find where you are in it, and act while it’s still open.