Cortisone Injections for Knee Arthritis: 4 Reasons to Avoid

If you are weighing cortisone injections for knee arthritis, you deserve a straight answer about what they can and cannot do. Arthritis is a common condition in which the cartilage and joint lining break down, and it loves heavily used, weight-bearing joints like the knees. For a lot of active people in Greenville, an arthritic knee is the reason they miss out on tennis, golf, hiking, cycling, and time with family. A shot sounds like an easy fix, so here are four honest reasons to think twice about cortisone injections for knee arthritis before you commit.

Reason 1: The Pain Relief Is Usually Modest and Short-Lived

Injecting corticosteroids directly into the joint is a standard treatment for knee arthritis, and it can calm an angry, swollen knee for a few weeks. That short-term role is real. The problem is what happens beyond those first weeks. When researchers have measured it carefully, the benefit of cortisone injections for knee arthritis turns out to be modest at best, and it fades.

In a two-year randomized trial, patients who got a corticosteroid injection every three months had no meaningful improvement in pain compared with a saline placebo. If the goal is lasting relief, repeated shots are not delivering it for most people.

Reason 2: Repeated Shots Carry a Real Risk

Here is the part that surprises people most about cortisone injections for knee arthritis. In that same JAMA trial, the group receiving steroid injections actually lost significantly more cartilage than the placebo group. In other words, the treatment meant to help the joint may have quietly harmed it.

As Dr. McAlindon of Tufts Medical Center put it, “We now know that these injections bring no long-term benefit, and may, in fact, do more harm than good by accelerating damage to the cartilage.” Repeated cortisone can contribute to further degenerative changes and, over time, nudge a knee toward replacement surgery. None of this means a single, well-timed injection is never appropriate, but it does mean cortisone injections for knee arthritis should be seen as a short-term tool, not a solution, and a choice to make with your doctor.

Reason 3: A Shot Can’t Fix Why Your Knee Really Hurts

A steroid quiets inflammation, but it does nothing about why the joint is overloaded in the first place. When the knee hurts, there are almost always contributing factors. Weakness of the thigh, hip, and trunk muscles overloads the tendons and bursae around the knee and can cause pain in the front, inside, or back of the joint. If the knee cannot fully straighten, extra stress lands on the inside of the knee.

Movement quality matters too. Stiffness at the ankle and insufficient lower-body strength change how you move, so squatting, lunging, kneeling, stepping, and walking all aggravate an arthritic knee. This is the gap that cortisone injections for knee arthritis simply cannot close. The best way to know what is driving your pain is a movement assessment that sorts out whether you have a strength, mobility, or movement problem.

Reason 4: There’s a Proven Alternative That Lasts

This is the encouraging truth. The alternative to cortisone injections for knee arthritis is well supported by evidence: a Cochrane review found that exercise reduces pain and improves function in knee osteoarthritis, with benefits that carry on for months after a program ends. Unlike a shot that wears off, the strength and mobility you build keep working for you. Building the right strength is one of the best things you can do for an arthritic knee.

The path looks like this. If the knee is irritated, hands-on therapy eases pain, and some of it you can do yourself with a foam roller, bands, or a simple patellar mobilization. If there is weakness, you learn to activate the muscles that are not firing, with go-to drills like the banded calf raise, hip hurdle, and leg-lock bridge. From there you retrain the functional movement patterns (squat, hinge, step and lunge), and once you can move without pain, you add resistance to build strength. Our full guide on how to strengthen your knees walks through it. Adequate strength can prolong the life of your knee for years, even if you have been told you have “bone-on-bone” arthritis.

Frequently Asked Questions

Do cortisone injections for knee arthritis actually work?

They can reduce pain and swelling for a few weeks, which is useful for a bad flare. But high-quality research shows little lasting benefit, and repeated injections did not beat placebo for pain over two years, so cortisone injections for knee arthritis are best used sparingly rather than as your main plan.

Are cortisone shots bad for your knee?

A single, well-timed injection is generally considered safe. The concern is with repeated shots: the JAMA trial linked them to greater cartilage loss. That trade-off is worth discussing honestly with your physician before signing up for a series. For anyone leaning on cortisone injections for knee arthritis as a long-term plan, this is the caveat that matters most.

I was told my knee is “bone-on-bone.” Can exercise still help?

Yes. Imaging severity does not map neatly onto pain or function, and many people with advanced arthritis get significantly better with strengthening and movement. It is not a guarantee, but “bone-on-bone” is not a dead end.

What should I try instead of, or alongside, injections?

An assessment-guided plan of hands-on care, muscle activation, and progressive strengthening. It addresses the causes a shot cannot, and the evidence for exercise in knee arthritis is strong. Used this way, cortisone injections for knee arthritis become an occasional tool rather than the whole strategy.

Get Lasting Knee Relief in Greenville, SC

If you have knee arthritis and want to overcome the pain without leaning on medications, injections, or surgery, the physical therapists at Movement Solutions in Greenville, SC would be glad to help. We can assess your knee, explain your options, and build a plan aimed at getting you back to the knee pain-free activities you love, from the Swamp Rabbit Trail to Paris Mountain.

Prefer to ask questions first? We offer a free 15-minute phone consultation. Call us at (864) 558-7346 and ask how we can help.