Steroid injections: when they help
An honest guide to when a steroid injection is worth having, what it can realistically achieve, and when a different approach will serve you better
A steroid injection can settle an inflamed joint, tendon sheath or bursa quickly and effectively. Used well, it is one of the most useful treatments in rheumatology. Used as the answer to everything, it can disappoint, or get in the way of finding the real problem. This guide explains when an injection genuinely helps, what to expect from it, and when it is better to do something else.
Written for patients and reviewed by Dr Liubov Borukhson, Consultant Rheumatologist (GMC 7021928). Last clinically reviewed: June 2026.
What is a steroid injection?
It is an injection of a corticosteroid, a medicine that calms inflammation, given into or around a joint, tendon sheath or bursa. It is often combined with a local anaesthetic, so both are given as a single injection. Because the steroid acts where it is placed, a small amount can settle inflammation in one area.
Injections are one of several forms of steroid treatment used in rheumatology, alongside tablets and steroids given into a muscle or a vein. Our guide to steroids: how they're used in rheumatology explains the different forms, their side effects, and how these medicines (corticosteroids) differ from the anabolic steroids misused in sport. Which form is suitable, and whether a steroid is the right treatment at all, depends on the diagnosis and is always discussed fully with you first.
When an injection genuinely helps
An injection works best when there is a clearly inflamed structure to treat and a clear reason for treating it. Common examples include:
- A single inflamed joint that is troublesome out of proportion to the rest, in someone whose condition is otherwise under control
- An inflamed tendon sheath or bursa, as in De Quervain's tenosynovitis, trigger finger or bursitis
- Settling inflammation while a longer-term medicine, such as a disease-modifying treatment, takes effect
- Creating a window of comfort so that physiotherapy or rehabilitation can make progress, for example in frozen shoulder
In each case the injection is part of a wider plan, not the whole plan. The diagnosis comes first, and the injection serves the plan rather than replacing it.
What to expect from the result
The local anaesthetic can make the area feel better almost straight away, but that effect wears off within hours. The steroid itself takes longer to work: relief usually builds over several days, so it is sensible to judge the result after a week or two rather than on the same evening.
How long the benefit lasts varies from person to person. For many people it is weeks to a few months; for some, one injection settles the problem for good, particularly where the underlying cause is also being addressed. An injection treats inflammation rather than its cause, so if the cause remains active the symptoms can return. That is not a failed injection; it is a sign that the wider plan needs attention.
When an injection is not the right choice
There are times when the honest answer is that an injection should wait, or should not happen at all:
- If there is any suspicion of infection in the joint, steroid must not be injected. The joint needs to be assessed first, usually with fluid drawn off for testing, as described in the guide to joint aspiration
- When the same joint keeps needing injections. Repeated injections into the same place at short intervals are generally avoided, and a joint that flares again and again is usually a sign that the underlying condition needs better control
- When treating the underlying condition matters more. If an inflammatory arthritis is active in many joints, the priority is treatment that controls the disease itself; injecting one joint after another does not achieve that
Sometimes the most useful consultation is the one where an injection is not given. The aim is the right treatment, not simply the quickest one.
Accuracy, and a one-stop visit
For many sites, particularly deeper or smaller targets, placing an injection accurately by feel alone is difficult. Ultrasound guidance allows the needle and the target to be seen in real time, so the medicine goes exactly where it is intended. The procedure itself is described in the separate guide to ultrasound-guided injections.
Because Dr Borukhson uses point-of-care ultrasound during the consultation, the assessment, the scan and, where appropriate, the injection can usually happen in a single visit. Just as importantly, the scan sometimes shows that an injection is not the right treatment after all, which is exactly the kind of decision this guide is about.
Aftercare, and a word of warning
Afterwards you can usually go straight home. It is sensible to rest the injected area for a day or two and build activity back up gradually. Any specific aftercare for the structure treated is explained at the time.
A few people notice a temporary flare of pain for a day or two once the anaesthetic wears off; this settles on its own. Infection after a steroid injection is rare, but it matters: if the area becomes increasingly hot, swollen and very painful in the days afterwards, or you develop a fever or feel unwell, seek medical advice urgently rather than waiting for it to pass.
Wondering whether an injection would help?
An assessment with ultrasound can establish whether an injection is the right step and, where it is, often carry it out in the same visit
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