Are Steroid Injections Harmful?
Few treatments in orthopedics carry as much undeserved fear as the steroid injection. Patients often arrive at my office having already decided, based on something they read online or heard from a friend, that a cortisone shot will "eat away" their joint or that they're only allowed to have a certain number in a lifetime. Some of that caution has a kernel of truth in it. Most of it is outdated or overstated. Here is what I actually see in practice, and what the research supports.
How a steroid injection works
Corticosteroids are powerful anti-inflammatory medications. When injected directly into an irritated joint, tendon sheath, or area of localized inflammation, they shut down the local inflammatory cascade that is driving pain and swelling. Because the medication is delivered right where the problem is, rather than swallowed and filtered through the entire body, a small dose can produce a large local effect with minimal systemic exposure.
Temporary relief: breaking the pain cycle
For many of the conditions I treat, the goal of an injection is straightforward — calm the inflammation long enough for the underlying problem to settle on its own. Conditions like a flare of osteoarthritis, tendinitis, or bursitis often follow a self-limited course, but the inflammation itself can become a cycle: swelling causes pain, pain causes guarding and stiffness, stiffness causes more irritation. A steroid injection interrupts that cycle. The relief a patient feels afterward is not just masking the problem; it is often removing the very inflammation that was preventing the tissue from calming down and healing.
When relief is permanent
What surprises many patients is how often a single injection resolves the problem entirely, with no recurrence. I see this regularly with:
- Trigger finger — a well-placed injection into the tendon sheath resolves a meaningful proportion of early cases without any further treatment
- De Quervain's tenosynovitis — often responds completely to one or two injections
- Trigger point and bursitis injections — frequently break a cycle of chronic irritation for good
- Mild carpal tunnel syndrome — can provide lasting symptom relief in a subset of patients, sometimes delaying or eliminating the need for surgery
In these situations, the injection isn't a stopgap. It is the treatment, and for the right patient it can be curative.
What about repeated injections for arthritic joints?
This is where the most persistent myths live. The old concern — dating back to animal studies from the 1960s and 70s using very high, repeated doses — was that corticosteroids might damage cartilage over time. That concern got baked into medical culture as a rule of thumb: no more than three or four injections a year, spaced at least three months apart.
That spacing guideline is still reasonable clinical practice, and I follow it. But it's worth being clear about why: it is a conservative, common-sense precaution rather than evidence of proven harm at appropriate intervals. When you look at the actual human data:
- Randomized trials using clinically appropriate doses and intervals — steroid every three months for up to two years, for example — have not shown accelerated joint space narrowing compared with placebo injections
- Large observational studies of real-world patients receiving repeated injections have found the long-term risk to joint structure to be minimal
- The clearest evidence of cartilage harm comes from animal models given far higher and more frequent doses than we use clinically, or from small studies with mixed and sometimes contradictory results
Put plainly: at the doses and intervals used in a typical orthopedic practice, the weight of human evidence does not support the idea that occasional, appropriately spaced steroid injections meaningfully accelerate arthritis. For a patient with a painful arthritic joint who is not yet ready for — or does not want — surgery, a periodic injection is a reasonable, low-risk way to stay comfortable and functional for months or years at a time.
The honest caveat: the research isn't unanimous. A minority of studies, particularly in weight-bearing joints like the knee, have raised questions about cartilage changes with very frequent, ongoing injections. This is why I don't recommend unlimited, indefinite injections without reassessing the joint — and why injections around tendons (as opposed to inside joints) are handled with extra caution, since tendon tissue is more sensitive to repeated steroid exposure than cartilage is.
The bottom line
Steroid injections are not a treatment to fear. Used thoughtfully — the right condition, a reasonable dose, appropriate spacing — they relieve pain effectively, and for many of the conditions I treat, they resolve the problem outright. For arthritic joints, occasional injections given a few months apart are a safe, well-supported way to manage pain without rushing toward surgery. The old "steroids will destroy your joint" warning made sense as a precaution decades ago; it does not hold up as a reason to avoid a treatment that, for the right patient, works very well.
If you're wondering whether an injection makes sense for your specific joint or tendon problem, that's exactly the kind of question worth bringing to your visit — the right answer depends on which structure is involved, how long you've had symptoms, and what else has already been tried.