Muscle, joint & pain

Do Cortisone Shots Damage Your Joints?

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Cortisone is one of the most common injections in orthopedics, and one of the most misunderstood. For a flare, it can buy weeks of relief. Given repeatedly to the same joint, the evidence turns unflattering, and in some tendons it makes the long-term outcome worse. Here is what the trials show, and how clinicians decide when a shot is worth it.

Last updated: July 2026

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Is a single cortisone shot bad for your joint?

For an occasional injection, the answer is reassuringly no. A single corticosteroid shot into an inflamed joint is a well-established way to quiet a flare, and most people feel relief within a few days. The common downsides are minor and temporary: a day or two of soreness as it settles, facial flushing, or a brief rise in blood sugar. Real concern about joint damage attaches to repetition, not to one shot.

An occasional, well-placed cortisone shot is a low-risk way to calm a flare. The steroid works by suppressing the inflammatory process that drives swelling and pain. That is genuine relief, and for many people it is enough to get moving again, which is where the lasting benefit actually comes from.

The worry people carry into the clinic, often from a friend or a forum, is that cortisone "eats the joint." That fear is not baseless, but it is misdirected. It comes from studies of injections repeated on a fixed schedule over years, not from a shot given now and then when a joint flares.

What did the repeat-injection knee trial actually show?

The clearest evidence comes from a randomized trial that gave people with knee osteoarthritis an injection every twelve weeks for two years, either corticosteroid or saline as a placebo. The steroid group had no less pain at the end, and imaging showed they had lost more cartilage volume than the saline group 1. Two years of injections, and the tradeoff ran the wrong way.

Corticosteroid every 12 weeks for two years produced no pain benefit over saline and greater cartilage volume loss 1. That is a specific finding about a specific regimen, not proof that every knee injection harms cartilage. But it is why clinicians stopped treating repeat cortisone as a harmless routine.

The practical reading: cortisone on a calendar, quarter after quarter, is the pattern the evidence turned against. This is the core of the corticosteroid cartilage harm question, and the honest answer is that repetition is where the risk lives.

Why cortisone can backfire in a tendon

Injecting cortisone around a tendon is a different story from injecting inside a joint, and here the long-term signal is worse. In a trial of tennis elbow, people who received a corticosteroid injection felt better early but ended up with worse outcomes and more recurrences at one year than those given a placebo injection 2. The shot bought short-term relief and cost long-term recovery.

In tendon problems like tennis elbow, cortisone often trades early relief for a worse result a year later 2. Tendons heal slowly and cortisone appears to interfere with that repair, so the tissue that felt better at six weeks was less recovered at twelve months.

This is why a thoughtful clinician treats a painful joint and a painful tendon as separate decisions. What is reasonable for an arthritic knee flare may be the wrong tool for an inflamed tendon.

How many cortisone shots are safe?

There is no single universally agreed number, which is precisely why patients ask. What guidelines and the trial evidence support is treating cortisone as a short-term option, spaced out, and reassessed each time rather than repeated on autopilot. Major osteoarthritis guidelines only conditionally recommend intra-articular corticosteroids, and mainly for short-term relief 34. The question of how many cortisone shots are safe is answered by frequency and purpose, not a fixed cap.

A common clinical convention is to space injections in a given joint by several months and to stop if a shot no longer helps or helps only briefly. But conventions vary, and the two-year knee trial is a reminder that more injections did not mean more benefit 1.

  • What the guidelines say: exercise and, for the knee, weight loss are the core treatments; cortisone is an adjunct for short-term relief, not the foundation 34.
  • What repetition buys: in the knee trial, quarterly injections for two years produced no pain advantage over saline 1.
  • The reframe: each shot is a decision, not a subscription. If it stops earning its place, that is information.

What cortisone does, and what it can't do

Cortisone treats inflammation; it does not treat the underlying joint. Osteoarthritis is a degenerative process in which cartilage gradually breaks down, and no injection reverses that 5. A steroid can lower the inflammation that a worn joint produces, which is why it eases pain, but the mechanical wear itself is untouched. Understanding this distinction is what keeps expectations honest.

Intra-articular means the injection goes inside the joint capsule itself, as opposed to into the surrounding soft tissue. A joint injection and a tendon injection are placed differently and behave differently.

So a shot that relieves pain has not "fixed" anything structural. That is not a criticism of cortisone; it is the correct job description. Problems arise only when a temporary relief tool is asked to do a permanent job, quarter after quarter.

Where a cortisone shot still earns its place

Cortisone is not the villain, and an evidence-based view is not an anti-injection view. Used as a bridge, a well-timed shot can lower pain enough to let someone start the exercise and rehabilitation that actually change the trajectory. For a sciatica flare, epidural corticosteroid gives small, short-term relief of leg pain, though it does not change the one-year outcome or reduce the odds of eventual surgery 6. Short-term relief, honestly framed, is a legitimate goal.

Reasonable uses share a shape: the shot has a clear purpose, a defined window, and a plan for what the relief is meant to enable.

  • As a bridge to movement: relief that lets you begin or continue rehab, rather than relief as the whole treatment.
  • For a defined flare: a single joint that has flared, not a standing quarterly appointment.
  • When the alternative is worse: for someone who cannot tolerate other options, a short-term shot may be the most reasonable step.

A hip cortisone injection, a shoulder cortisone injection, or a knee injection can all fit this pattern. The cost of a cortisone injection is a separate practical question worth asking about before you book. What ties the reasonable uses together is that the shot serves a plan instead of replacing one.

The treatments that change the trajectory

If cortisone does not fix the joint, something has to, and for arthritis the something is unglamorous. Every major osteoarthritis guideline puts structured exercise at the center, with weight management added for knee arthritis 34. These are strongly recommended, not conditional, because they are the interventions that improve pain and function over time rather than for a few weeks 5.

This is the sequence-of-care logic that cortisone fits inside. A shot can calm the flare that makes exercise feel impossible; the exercise is what carries the benefit forward.

  • Exercise and physical therapy: the strongly recommended core for hip and knee arthritis 34.
  • Weight management: for knee arthritis, losing weight reduces both load and pain 34.
  • Cortisone: a conditional, short-term adjunct that supports the plan without being the plan 34.

Seen this way, the anxious question changes. It is less "will this shot damage my joint" and more "what is this shot for, and what am I doing with the relief it buys."

Common questions

For most people, no. A single, occasional corticosteroid injection into an inflamed joint is a low-risk way to calm a flare, with mostly minor and temporary side effects such as a brief post-injection ache, facial flushing, or a short rise in blood sugar. The concern about joint damage comes from injections repeated on a schedule over years, not from one shot.

There is no single agreed limit. Guidelines treat cortisone as a short-term option to be spaced out and reassessed, not repeated automatically. A common convention is to leave several months between injections in the same joint and to stop if a shot no longer helps. In a two-year knee trial, quarterly injections produced no pain benefit over saline.

Repeated injections can. In a randomized trial, knee arthritis patients given corticosteroid every twelve weeks for two years lost more cartilage volume than those given saline, with no pain advantage. A single occasional shot has not been shown to do this. Cortisone does not cause arthritis, but repetition on a fixed schedule appears to work against the joint.

Yes, and the tendon evidence is less favorable. In a tennis elbow trial, people given a corticosteroid injection felt better early but had worse outcomes and more recurrences at one year than those given placebo. Cortisone appears to interfere with tendon healing, so a shot that helps at six weeks can leave the tissue less recovered at twelve months.

No. Cortisone is a symptom treatment, not a step on a conveyor belt to the operating room. For many people it is a bridge that lowers pain enough to do the exercise and rehabilitation that improve the joint over time. Whether surgery is ever needed depends on the underlying condition and how it responds to core treatments, not on having had a shot.

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When a cortisone shot needs a call, not a wait

  • —Increasing pain, warmth, redness, and swelling in the injected joint one to three days after the shot, especially with fever or chills, which can signal a joint infection
  • —A joint that becomes hot, exquisitely tender, and hard to move after an injection
  • —Fever above 101F in the days after an injection with no other clear source
  • —In people with diabetes, a blood sugar spike after a shot that will not come back down with usual measures

A joint that becomes hot, swollen, and increasingly painful after an injection, particularly with fever, can be a septic joint and is a same-day emergency; go to an emergency room or urgent care rather than waiting for a routine appointment.

This article explains what research shows about corticosteroid injections in general terms. It is educational and is not medical advice, a diagnosis, or a treatment recommendation for any individual. Decisions about whether, where, and how often to inject a joint depend on your specific situation and belong with a clinician who can examine you.

References

  1. 1.McAlindon TE, LaValley MP, Harvey WF, et al. (2017). Effect of Intra-articular Triamcinolone vs Saline on Knee Cartilage Volume and Pain in Patients With Knee Osteoarthritis: A Randomized Clinical Trial. JAMA. PMID 28510679 ✓Repeated intra-articular corticosteroid every 12 weeks for two years produced no pain benefit over saline and was associated with greater cartilage volume loss in knee osteoarthritis.
  2. 2.Coombes BK, Bisset L, Brooks P, Khan A, Vicenzino B (2013). Effect of Corticosteroid Injection, Physiotherapy, or Both on Clinical Outcomes in Patients With Unilateral Lateral Epicondylalgia: A Randomized Controlled Trial. JAMA. PMID 23385272 ✓For tennis elbow, corticosteroid injection produced worse one-year outcomes and higher recurrence than placebo injection, illustrating that cortisone can worsen long-term tendon outcomes.
  3. 3.Kolasinski SL, Neogi T, Hochberg MC, et al. (2020). 2019 American College of Rheumatology/Arthritis Foundation Guideline for the Management of Osteoarthritis of the Hand, Hip, and Knee. Arthritis & Rheumatology / Arthritis Care & Research. doi:10.1002/art.41142 ✓Strongly recommends exercise and weight loss as core osteoarthritis treatment and conditionally recommends intra-articular corticosteroids, positioning cortisone as an adjunct rather than the foundation.
  4. 4.Bannuru RR, Osani MC, Vaysbrot EE, et al. (2019). OARSI guidelines for the non-surgical management of knee, hip, and polyarticular osteoarthritis. Osteoarthritis and Cartilage. linkCore treatments for knee, hip, and polyarticular osteoarthritis are education and structured exercise (with weight management for the knee); intra-articular corticosteroids are conditionally recommended for short-term relief.
  5. 5.National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) (2023). Osteoarthritis. NIAMS, National Institutes of Health. link ✓Osteoarthritis is a degenerative joint disease in which cartilage gradually breaks down, providing the definitional basis for why an anti-inflammatory injection does not reverse the underlying structural change.
  6. 6.Pinto RZ, Maher CG, Ferreira ML, et al. (2012). Epidural Corticosteroid Injections in the Management of Sciatica: A Systematic Review and Meta-analysis. Annals of Internal Medicine. doi:10.7326/0003-4819-157-12-201212180-00564 ✓Epidural corticosteroid injections give small, short-term relief of sciatica leg pain but no meaningful long-term benefit and no reduction in subsequent surgery, illustrating cortisone as a short-term bridge.

6 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — citations link their sources. Editorial policy

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