Can Your Primary Doctor Give You a Cortisone Shot?

Primary care doctors can absolutely give cortisone shots, and many do so routinely. Joint and soft-tissue corticosteroid injections are among the most commonly performed office procedures in family medicine and internal medicine practices. A study evaluating musculoskeletal injections performed in a primary care setting found an overall success rate of nearly 88% at six weeks, with significant pain relief and no major complications.¹ Whether your particular doctor offers them depends on their training, comfort level, and the joint or structure involved, but there is nothing unusual about getting a cortisone shot without ever seeing a specialist.

What Primary Care Doctors Are Trained to Inject

Family medicine residency programs overwhelmingly teach injection skills. In a survey of program directors, over 98% agreed that family physicians should be able to perform joint aspirations and injections.² That said, how much hands-on practice a given resident gets varies. Residents who participate in sports medicine tracks perform injections at significantly higher rates than their peers. By their final year, sports-medicine-track residents were performing injections on roughly four times as many patient encounters as non-track residents.³ In practical terms, some primary care doctors inject knees and shoulders weekly, while others may refer most of those cases out. If your doctor does not do injections often, they will typically tell you so and point you to a colleague or specialist.

The most common targets in a primary care office are the knee (for osteoarthritis), the shoulder (for bursitis or rotator cuff tendinopathy), the elbow (for tennis elbow), and the hand or wrist (for trigger finger and carpal tunnel syndrome).¹ A randomized trial of patients with tennis elbow recruited entirely through family doctors, who administered the cortisone injections themselves.⁴ In other words, primary care involvement in cortisone injections is not a recent trend or a corner-cutting shortcut; it is embedded in established clinical practice and research.

How Well Do the Shots Work

The answer depends heavily on what you are getting injected for. Cortisone shots are not a one-size-fits-all fix, and the evidence varies by condition.

For knee osteoarthritis, a meta-analysis of high-quality studies found that patients were roughly twice as likely to experience symptom improvement compared to controls in the first few months after injection.⁵ Another study reported a mild-to-moderate effect on pain lasting up to three months, which is longer than some older estimates suggested.⁶ However, the benefit tends to fade. In one randomized trial comparing cortisone injection with another treatment, over 80% of cortisone patients reported improvement at two and four weeks, but by six months only 29% still felt better.⁷ The pattern is consistent across the literature: cortisone provides real but temporary relief for arthritic knees.

For shoulder conditions like rotator cuff tendinopathy, the picture is more modest. A Cochrane review found that subacromial steroid injection had only a small benefit over placebo in some trials, and pooled results of multiple trials showed no clear advantage over anti-inflammatory pills.⁸ Subacromial bursa injections did produce meaningful pain and function improvements across dose groups, but the clinical benefit depended on the dose and number of injections.⁹

For tennis elbow, cortisone injections deliver fast relief in the short term. A systematic review found moderate evidence that corticosteroid injections significantly reduce pain within a few weeks compared to platelet-rich plasma, though the improvement may not be clinically meaningful.¹⁰ The catch is that this early advantage fades, and patients treated with cortisone sometimes end up worse at six months to a year than those who received other treatments or no injection at all.¹¹ This does not mean the shot is useless; it means the injection is best understood as a bridge to get you through an acute flare-up, not a long-term solution.

Does It Matter Whether Your Doctor Uses Ultrasound

Many primary care offices use a “landmark-guided” technique, meaning the doctor identifies the injection site by feel and anatomical landmarks rather than imaging. Specialists, particularly in sports medicine and rheumatology, increasingly use ultrasound to watch the needle in real time. The accuracy difference can be substantial. An umbrella review found that ultrasound-guided injections into the shoulder joint were accurate around 86% to 100% of the time, compared with 45% to 100% for landmark-guided injections.¹² A separate review confirmed that ultrasound-guided injections are more accurate regardless of which body part is being injected.¹³

Does higher needle accuracy always translate into better pain relief? Not necessarily for every joint. Knees are large and relatively easy to enter without imaging, so the accuracy gap matters less there than it does for smaller or more complex joints like the shoulder or wrist. If your primary care doctor is injecting your knee for osteoarthritis and has done so many times before, the lack of ultrasound probably does not change your outcome much. For deep or tricky targets, particularly small joints or tendons, ultrasound guidance becomes more important. That is often the point at which your doctor would refer you out rather than attempt a blind injection into a structure they cannot easily palpate.

Risks and Side Effects to Know About

Cortisone injections are generally low risk, but “low risk” is not “no risk.” The most common nuisance is a post-injection flare, where the injected area hurts more for a day or two before improving. This happens because the crystalline steroid suspension can irritate the tissue before it dissolves and begins working. A systematic review found that minor adverse events after soft-tissue cortisone injections were actually quite common in some studies, while major complications were rare.¹⁴

The recognized local side effects include:

• Skin changes: Lightening of the skin (hypopigmentation) or thinning at the injection site, which can be cosmetically noticeable, particularly in people with darker skin.
• Tendon weakening: Repeated injections near a tendon can increase the risk of rupture, which is why doctors generally avoid injecting directly into tendons.
• Cartilage thinning: Discussed in more detail below.
• Post-injection flare: Temporary worsening of pain for one to two days.

Infection is the complication patients worry about most, but the actual numbers are reassuring. A retrospective analysis of over 15,000 intra-articular cortisone injections found only 14 cases of septic arthritis, an incidence of about one in a thousand.¹⁵ A larger propensity-matched study found that joint injection patients actually had a slightly lower rate of septic arthritis within 21 days than a control group visiting for other reasons, suggesting the procedure itself is not a major infection driver when standard sterile technique is followed.¹⁶ Infection risk rises meaningfully only when hygiene precautions break down, such as reuse of multi-dose vials across patients or failure to properly clean the skin.¹⁷

The Cartilage Question

A concern that has gotten more attention in recent years is whether repeated cortisone injections damage cartilage. A two-year randomized trial compared patients who received cortisone injections into their knee every three months against patients who received saline injections on the same schedule. The cortisone group lost more cartilage over two years, with a statistically significant difference in cartilage thickness between the two groups. Pain scores, surprisingly, were not meaningfully different between groups by the end of the study.¹⁸ The cartilage loss was not associated with worse symptoms during the trial period, but faster cartilage loss has been linked in other research to higher rates of eventually needing a knee replacement.

This finding does not mean a single cortisone shot will destroy your knee. It means that getting injected every three months for years on end carries a structural cost that you should weigh against the short-term benefit. Most guidelines suggest limiting injections to about three or four per joint per year.¹⁹ Your doctor should be tracking how many shots you have received and discussing what comes next if they stop working.

What If You Have Diabetes

If you have diabetes, cortisone injections deserve an extra conversation. Corticosteroids raise blood sugar, and the spike can be meaningful. A study of diabetic patients who received hand or wrist injections found a significant increase in fasting blood glucose on the first day after injection (averaging about 43 mg/dL above baseline) and a smaller but still significant increase on day two. By day four, blood sugar levels had returned to normal.²⁰

Shoulder injections in people with type 2 diabetes showed a similar pattern, with mean glucose rising from about 136 mg/dL before the injection to 159 mg/dL during the first three days after. More concerning, the time spent with very high blood sugar (above 250 mg/dL) roughly doubled on the first day post-injection, and 4 of 25 patients developed new glucose readings above 350 mg/dL.²¹ The injection site may matter too: one study found that knee injections caused a more significant blood sugar elevation than hand or wrist injections in diabetic patients, possibly because larger joints receive higher steroid doses.²²

None of this means you cannot get a cortisone shot if you have diabetes. It means your doctor should know about your diabetes beforehand, and you should monitor your blood sugar more closely for the two to three days after the injection. If your blood sugar is already running high and poorly controlled, your doctor may want to postpone the injection or coordinate with whoever manages your diabetes.

When Your Doctor Should Not Give the Injection

There are clear situations where a cortisone shot is off the table regardless of who is holding the needle. Active infection at or near the injection site is the most absolute contraindication, since steroids suppress the local immune response and can turn a minor infection into a dangerous one. A joint fracture, joint instability, and current bloodstream infection are also reasons to avoid the procedure.²³ Relative contraindications include severe osteoporosis near the joint, a bleeding disorder, or having already received three injections in the same joint within the past year.

Your doctor should also ask whether you are planning a joint replacement in the near future. A meta-analysis found that a cortisone injection within three months before total knee or hip replacement increases the risk of post-surgical joint infection.²⁴ The risk was sharpest when the injection occurred within two weeks of surgery, where one large study found it nearly tripled the odds of post-operative infection.²⁵ A separate meta-analysis on hip arthroplasty found a similar elevated risk when injections were given within three months pre-operatively.²⁶ If a joint replacement is on your horizon, make sure both your primary care doctor and your surgeon know about any recent injections.

Why the Local Anesthetic Matters Too

Most cortisone injections come mixed with a local anesthetic like lidocaine or bupivacaine. The anesthetic gives you immediate pain relief while the steroid takes a day or two to kick in. But the combination is not purely beneficial. Lab studies on human cartilage cells show that when corticosteroids are combined with local anesthetics, the mixture is more toxic to cartilage than either drug alone.²⁷ A scoping review confirmed that this combined chondrotoxicity is time-dependent, meaning it gets worse with longer exposure.²⁸

This is primarily a concern for intra-articular injections, where the drugs sit in a joint space in contact with cartilage. For soft-tissue injections around tendons or into bursae, the relevance is lower. In clinical practice, the concentrations and exposure times are brief enough that a single injection is unlikely to cause measurable cartilage harm. The concern grows when someone receives repeated injections over many months, compounding whatever minor toxic effect each round carries. It is worth asking your doctor what they are mixing in and whether the anesthetic is necessary for your particular injection, especially if you have already had several shots in the same joint.

The Placebo Effect Is Real and Large

Something that rarely comes up in the exam room: a sizable portion of the relief you feel after a cortisone shot may not come from the cortisone itself. A study examining placebo injections in knee osteoarthritis trials found that patients who received sham injections (saline or another inert substance) experienced pain reduction in 93% of cases. At one month, the average pain reduction from placebo injections was substantial, and placebo injections produced significantly greater pain relief than placebo pills.²⁹

This does not mean cortisone shots are “just placebo.” The active drug does outperform sham injections, especially in the first few weeks. But it does mean the act of getting an injection carries its own therapeutic weight, likely through expectation, the ritual of a medical procedure, and the body’s own pain-modulating responses. When someone tells you their cortisone shot “worked wonders,” some fraction of that result came from the needle and the doctor’s reassurance, not the steroid.

When Cortisone Is Not the Best Option Anymore

Your primary care doctor may also discuss alternatives, especially if cortisone has stopped delivering meaningful relief or you have hit the recommended ceiling on injections per year. For tennis elbow, platelet-rich plasma injections show slower initial improvement compared to cortisone but better outcomes over six months to two years.¹¹ PRP is not universally available in primary care offices, since it requires a centrifuge and carries a higher cost, but some practices do offer it. Hyaluronic acid injections for knee osteoarthritis are another option that some primary care doctors perform, though the evidence on their benefit over cortisone is mixed.

Physical therapy deserves a mention here, because it is the non-injection intervention with the strongest long-term evidence for most of the conditions treated with cortisone shots. The same trial that enrolled tennis elbow patients through family doctors found that while cortisone injections worked fastest, physiotherapy and even a wait-and-see approach eventually caught up or surpassed the injection group.⁴ If your primary care doctor suggests cortisone as a way to control pain while you start rehab exercises, that is often the smartest use of the injection: not as the sole treatment, but as a short-term aid that helps you engage in the physical therapy that produces lasting improvement.