Joint injections: everything you need to know
Joint injections are a common and effective treatment used in rheumatology to relieve pain, reduce inflammation, and improve movement in affected joints. For many patients, they can offer a welcome alternative to oral medication or surgery. In this article, a consultant rheumatologist explains how joint injections work, what to expect from the procedure, and the benefits and risks involved.
What joint ailments can be treated with injections
Joint injections are used to treat a range of musculoskeletal and rheumatological conditions, particularly those involving inflammation or degeneration. They are commonly offered to patients with osteoarthritis, especially of the knees, shoulders, hips, or hands, where joint wear and tear leads to pain and stiffness.
Inflammatory joint conditions such as rheumatoid arthritis, psoriatic arthritis, and gout may also benefit from injections, especially when one or two joints are particularly troublesome. In addition, injections are often used around tendons and bursae – for example, in shoulder impingement, tennis elbow, or trochanteric bursitis – to target inflammation in the surrounding soft tissues.
In some cases, injections are used diagnostically to help determine whether a particular joint is the source of pain. Relief after an injection can confirm that the injected area is indeed the problem site.
What happens during a joint injection
The substances most commonly injected into joints are corticosteroids, powerful anti-inflammatory medications that work directly at the site of inflammation. In some cases, a local anaesthetic is added to provide immediate pain relief and to confirm that the injection has reached the correct area.
Another type of injection sometimes used is hyaluronic acid, a gel-like substance that mimics the natural fluid found in healthy joints. These injections may be considered for certain types of osteoarthritis, where lubrication and cushioning within the joint have been lost.
The procedure itself is usually quick and straightforward. The skin over the joint is cleaned carefully, and the clinician may use ultrasound guidance to ensure precise placement of the needle, particularly for deeper or smaller joints. The injection is then administered into the joint space. Most patients describe only mild discomfort, and the whole process typically takes only a few minutes.
Aftercare and recovery
After the injection, patients are usually advised to rest the treated joint for 24 to 48 hours. Gentle movement is encouraged to prevent stiffness, but strenuous activity, heavy lifting, or high-impact exercise should be avoided for a couple of days.
Some people experience mild soreness or a feeling of fullness in the joint for a short period after the injection. Applying a cold compress and using simple pain relief such as paracetamol can help if needed.
The effects of corticosteroid injections may take a few days to become noticeable, with maximum benefit often seen after one to two weeks. Relief can last anywhere from several weeks to several months, depending on the individual, the underlying condition, and the joint treated.
Follow-up with the treating clinician is important, particularly if the injection is part of a wider management plan. Regular assessment helps to determine whether repeat injections or alternative treatments may be needed.
The benefits of joint injections
For many patients, the main advantage of joint injections is targeted pain relief without the systemic side effects that can accompany oral medications. Inflammation can be reduced quickly and effectively, improving joint function and allowing patients to return to normal activities.
In some rheumatological conditions, injections can also help prevent longer-term joint damage by controlling local inflammation. In the case of osteoarthritis, improved comfort can support physiotherapy, exercise, and weight management, which are key components of ongoing care.
Risks and potential side effects
Like any medical procedure, joint injections are not without risks, though serious complications are rare. The most common side effect is temporary discomfort or a mild flare of pain shortly after the injection, which usually settles within a day or two.
There is a small risk of infection, which is why sterile technique is essential during the procedure. Other uncommon risks include skin thinning, loss of skin pigment, or minor bleeding or bruising at the injection site. Repeated steroid injections into the same joint should be spaced appropriately to avoid potential joint or tissue damage.
For patients with diabetes, corticosteroid injections can temporarily raise blood sugar levels, so monitoring and appropriate adjustment of medication may be advised.
Joint injections are a valuable part of rheumatological care, offering targeted relief and improved joint function for many people living with painful or inflamed joints. With the right preparation, careful technique, and sensible aftercare, they can provide significant benefit and form an important step towards maintaining mobility, independence, and quality of life.
