Hip injections are generally safe when performed with image guidance and sterile technique. The most common side effects are mild, including temporary pain at the injection site and short-lived flares, while serious complications like joint infection occur in roughly 1 in 10,000 cases. That said, safety depends on the type of injection, how often you get them, and your individual health profile.
Common Side Effects
The most frequent reaction to a hip injection is a postinjection flare, a temporary spike in pain that feels worse than what you walked in with. Studies of joint injections report flare rates between 33% and 35%. These flares typically show up one to two days after the injection, last about two days on average, and don’t interfere with the longer-term benefits of the treatment.
Skin changes at the injection site are another possibility, particularly with corticosteroid injections. You may notice lightening of the skin or thinning in the area, sometimes appearing several weeks after the procedure. These changes are more common with repeated injections and are linked to the steroid particles migrating along the needle path within the soft tissue.
How Different Injection Types Compare
Not all hip injections carry the same risks. The three most common types are corticosteroid injections, hyaluronic acid (viscosupplementation), and platelet-rich plasma (PRP).
Corticosteroid injections are the most widely used and the most studied. They’re effective for short-term pain relief, but they carry the broadest range of potential side effects, especially with repeated use. These include accelerated cartilage loss, stress fractures in the bone beneath the cartilage, and in rare cases, rapid joint destruction. One review in Radiology identified four main structural problems observed after repeated steroid injections: faster osteoarthritis progression, bone fractures just below the joint surface, osteonecrosis (loss of blood supply to bone), and severe joint breakdown including bone loss.
Hyaluronic acid injections have a milder side effect profile. The main concerns are injection-site pain, local swelling, and a small risk of pseudoseptic reactions, which mimic a joint infection with swelling and warmth but aren’t caused by bacteria. One specific formulation derived from rooster combs has slightly higher rates of allergic reactions due to residual animal proteins. If you have a known allergy to poultry products, mention it before receiving this type of injection.
PRP injections, which use concentrated platelets from your own blood, show the most favorable safety data so far. Across multiple clinical trials involving hundreds of patients, no major adverse events were reported. Minor side effects like localized pain, warmth, and stiffness occurred in a small number of patients and resolved on their own. Some studies noted slightly more post-injection pain with PRP compared to hyaluronic acid, but nothing requiring additional treatment.
Serious but Rare Complications
Joint infection (septic arthritis) is the complication most people worry about, and for good reason: it can cause permanent joint damage. The reassuring reality is that infection rates after steroid injections into joints are extremely low, around 1 in 10,000 procedures. Sterile technique and image guidance during the injection minimize this risk further. If you develop fever, significant swelling, redness, or worsening pain in the days following an injection, seek medical attention promptly, as early treatment of a joint infection is critical.
Avascular necrosis of the femoral head, where bone tissue dies due to interrupted blood supply, has been a longstanding concern with hip steroid injections. Some older reports suggested rates as high as 30% in certain populations, but more recent data paints a different picture. A retrospective study of 530 hips that received ultrasound-guided corticosteroid injections found only one case of avascular necrosis, and that patient had been on oral steroids for over 20 years. When injections are performed properly with image guidance, the actual risk appears minimal.
Why Image Guidance Matters
The hip is a deep joint surrounded by major blood vessels and nerves, making blind injections (based on feel and landmarks alone) less reliable and potentially riskier. Modern hip injections are almost always performed with either ultrasound or fluoroscopy (real-time X-ray) guidance. Both methods achieve accuracy rates between 97% and 100% for placing the needle correctly inside the joint.
Ultrasound has become increasingly popular because it matches fluoroscopy in accuracy while eliminating radiation exposure and the need for contrast dye. If you’re offered a hip injection, it’s reasonable to confirm that image guidance will be used.
Blood Sugar Spikes for People With Diabetes
If you have diabetes, corticosteroid hip injections will temporarily raise your blood sugar. On average, glucose levels jump by about 64 mg/dL the day after injection and return to baseline by day two. But the spike varies significantly depending on how well-controlled your diabetes is. Patients with an HbA1c of 7% or lower saw increases of about 48 mg/dL, while those with higher HbA1c levels averaged a 99 mg/dL spike. Patients on insulin experienced the largest swings, averaging 135 mg/dL above baseline. In extreme cases, blood sugar can temporarily climb by 350 mg/dL or more.
This doesn’t mean diabetic patients can’t receive hip injections, but you should plan for it. Monitor your blood sugar closely for 48 hours after the procedure and discuss any adjustments to your insulin or medication with your care team beforehand.
Other Situations That Increase Risk
Blood-thinning medications increase the chance of bleeding or bruising at the injection site. Most providers will ask you to stop blood thinners before the procedure, though the specific timeline varies by medication. Always disclose what you’re taking so your doctor can advise you on when to pause and restart.
Active infections anywhere in the body are a contraindication. If bacteria are circulating in the bloodstream and a needle introduces them directly into the joint space, septic arthritis becomes a real possibility. Even a minor skin infection near the injection site is enough reason to postpone.
The Cartilage Question
Perhaps the most important safety concern isn’t about a single injection but about repeated ones. Corticosteroids can accelerate the breakdown of cartilage in the hip joint over time. Case reports have documented patients progressing from moderate osteoarthritis to needing a total hip replacement within just three months of injection. While these represent worst-case outcomes, they illustrate why most providers limit the frequency of steroid injections and avoid using them as a long-term management strategy.
This is also why providers typically won’t perform corticosteroid hip injections on a regular schedule over months or years. Each injection may relieve symptoms temporarily, but the cumulative effect on the joint’s structural integrity is a genuine trade-off to consider.
Recovery and Getting Back to Activity
Plan on one to two days of relative rest after a hip injection. During the first 24 hours, limit activity to allow the medication to absorb and to watch for any adverse reactions. After that initial window, you can begin progressive weight-bearing activities like cycling, using an elliptical, or doing bodyweight exercises. Full return to sport or high-impact activity generally happens as tolerated based on how your symptoms respond.
For competitive athletes, some governing bodies enforce stricter timelines. The Union Cycliste Internationale, for example, requires eight days of rest and no competition after a glucocorticoid injection. Even if you’re not a professional athlete, easing back into activity over several days rather than jumping straight into intense exercise is a sensible approach.