Joint replacement surgery — such as a knee or hip replacement — can dramatically improve pain and mobility. However, it’s still possible to experience discomfort, stiffness, or inflammation around the replaced joint afterwards. Steroid injections can be given near a replaced joint, but only in specific situations and with strict safety protocols.
What matters most is where the injection is placed
✔ Safe:
Injection into surrounding soft tissues, such as:
- Bursae (e.g., trochanteric bursa)
- Tendons
- Ligaments
- Areas of inflammation around the joint
These injections do not enter the artificial joint, so the risk of infection is very low when performed under sterile, ultrasound-guided technique.
✘ Not Recommended:
Injection directly into the artificial joint (prosthesis)
Injecting into the joint space of a replacement is generally avoided because it may slightly increase the risk of infection, which can be serious in prosthetic joints.
When Might a Steroid Injection Help After Joint Replacement?
Patients may experience pain even after a successful replacement. Common treatable conditions include:
- Bursitis (e.g., trochanteric or pes anserine bursitis)
- Tendon inflammation
- Scar-tissue pain
- Soft-tissue irritation around implants
- Persistent swelling from overuse
In these conditions, a targeted steroid injection can significantly reduce inflammation and improve comfort.
When Should You Avoid a Steroid Injection?
A cortisone injection is usually avoided if:
- The pain is suspected to be coming from inside the prosthetic joint
- There is any sign of infection
- You have had a recent joint replacement (within 3 months)
- You have multiple risk factors for infection (e.g., uncontrolled diabetes)
If needed, our clinicians may recommend further imaging or refer you back to your orthopaedic surgeon for assessment.
What to Expect During the Procedure
Assessment & Ultrasound Scan
We evaluate the source of your pain and confirm whether the injection is appropriate.Ultrasound-Guided Injection
A combination of a corticosteroid and local anaesthetic is placed precisely into the inflamed soft tissue.Immediate Relief
The anaesthetic may give instant comfort, with the steroid acting fully within 48–72 hours.Recovery
You can walk immediately but should rest the area for 24–48 hours.
Aftercare & Recovery
To ensure the best outcome, we recommend:
- Resting the knee for 24–48 hours
- Avoiding heavy exercise for a few days
Explore Other Treatment Options
Hyaluronic Acid Injections
Hyaluronic acid (HA) injections can help improve joint lubrication by replenishing the natural hyaluronic acid found within the joint. This may reduce friction between joint surfaces, support smoother movement and help improve comfort during everyday activities.
PRP Injections
Platelet-rich plasma (PRP) injections use a concentrated preparation of your own platelets to support the body’s natural healing processes within the affected joint. They may help support tissue repair, reduce discomfort and promote improved joint function and mobility.
Frequently Asked Questions
Is it safe to have a steroid injection around the replaced joint?
Yes. In many cases we can safely inject into the soft tissues around the joint (e.g., bursae or tendons), especially with ultrasound guidance to avoid the implant.
How long should I wait after my joint replacement before having an injection?
We typically recommend waiting at least 3 months after surgery. This allows tissues to heal and lowers infection risk.
Will the injection affect my knee or hip implant?
No — when done under ultrasound guidance, injections are placed safely away from the prosthesis and do not harm the implant.
How often can I have a steroid injection after joint replacement?
This varies by condition, but typically no more than 3–4 times per year, spaced several months apart. Your clinician will guide you.