The duration of pain relief from a corticosteroid injection is one of the most important factors patients consider when weighing up treatment options. The honest answer is that it varies — but understanding what affects the duration can help set realistic expectations and inform a smarter treatment plan.
Typical Duration of Relief
For most patients, a corticosteroid injection provides meaningful pain relief lasting anywhere from six weeks to six months. Some patients report relief lasting a year or longer, particularly following a well-placed, ultrasound-guided injection.
At Alton Pain Clinic, our use of ultrasound guidance is central to maximising the effectiveness of each injection — ensuring the corticosteroid is delivered precisely to where it is needed most.
Factors That Affect How Long a Cortisone Injection Lasts
Several variables influence the duration of relief:
- The severity of the underlying condition: Mild to moderate inflammation typically responds better and for longer than advanced or degenerative disease. Patients with early-stage osteoarthritis, for example, may experience longer-lasting relief than those with severe joint damage.
- The joint or tissue being treated: Weight-bearing joints such as the knee and hip are subject to continuous mechanical stress, which can reduce how long an injection lasts compared to a shoulder or elbow injection, where the joint is less loaded during daily activity.
- The type and dose of corticosteroid used: Different corticosteroid preparations have different durations of action. Longer-acting agents such as triamcinolone acetonide tend to provide more sustained relief than shorter-acting formulations. Our clinicians select the most appropriate preparation for each patient.
- Injection accuracy: Research shows that ultrasound-guided injections are significantly more accurate than unguided approaches, and that accuracy is directly linked to the degree and duration of pain relief. This is why we exclusively use ultrasound guidance at Alton Pain Clinic.
What to Do When Relief Wears Off
If your symptoms return after a corticosteroid injection, it is worth reviewing your options with our team. A further injection may be appropriate, or it may be time to explore alternatives such as:
- Arthrosamid — a long-lasting hydrogel treatment for knee osteoarthritis
- Hyaluronic acid (viscosupplementation) injections
- Platelet-rich plasma (PRP) therapy
Key Takeaways
✓ Corticosteroid injections typically last between six weeks and six months
✓ Some patients experience relief for up to a year or longer
✓ Duration depends on the condition, joint, corticosteroid type, and injection accuracy
✓ Ultrasound-guided injections at Alton Pain Clinic maximise precision and effectiveness
This article is intended for informational purposes only and should not replace professional medical advice. If you are experiencing persistent symptoms, please consult a qualified clinician.
Frequently Asked Questions
Why did my cortisone injection only last a few weeks?
Short-lived relief can occur for several reasons, including the severity of the underlying condition, the accuracy of injection placement, or high levels of physical activity immediately after the injection. If relief was brief, please speak to our team — we can review your treatment plan and explore whether an alternative approach may deliver longer-lasting results.
Does a cortisone injection work immediately?
The corticosteroid itself typically takes three to seven days to reach its full anti-inflammatory effect. If a local anaesthetic is included in the injection, you may notice some immediate short-term relief, but this wears off within a few hours as the anaesthetic clears — before the corticosteroid takes effect.
Can I have another injection if the first one didn't last long enough?
Possibly, yes — but we recommend waiting at least six to twelve weeks before repeating an injection at the same site. If repeated injections are providing only short-term relief, our clinicians will discuss whether a different treatment option would be more appropriate for your condition.