A painful knee on the stairs, a shoulder that disturbs sleep, or a hand that will not comfortably grip a kettle can make everyday life feel much smaller. Arthritis injections can reduce pain and inflammation for some people, but they are not a one-size-fits-all answer. The right option depends on the joint involved, the type and stage of arthritis, your medical history, and, most importantly, what you need to get back to doing.

At The Arthritis Clinic, injections are considered as part of a wider plan that may also include a detailed musculoskeletal assessment, diagnostic ultrasound, targeted rehabilitation and practical advice on managing load. The aim is not simply to treat a scan finding. It is to help you move with greater confidence and return to the activities that matter to you.

What can arthritis injections treat?

Injections are most commonly used for osteoarthritis, particularly in the knee, hip, shoulder, thumb, ankle and other painful joints. They may also be used where inflammation within or around a joint is contributing to symptoms, although inflammatory forms of arthritis such as rheumatoid arthritis should be managed in partnership with an appropriate rheumatology team.

The purpose of an injection varies. For one person, it may settle a significant flare enough to make walking and sleeping more manageable. For another, it may create a more comfortable window in which to rebuild strength after months of avoiding movement. In some cases, it can be an option when tablets are unsuitable, poorly tolerated or have not provided enough relief.

An injection cannot reverse worn cartilage or remove arthritis altogether. It may, however, be a useful non-surgical treatment when chosen for the right reason and combined with a plan for the months that follow.

Types of arthritis injections and how they differ

Corticosteroid injections

Corticosteroid injections are used to calm inflammation and can provide relatively prompt pain relief. They are often considered when a joint is acutely swollen, very painful or preventing normal movement and rehabilitation. Relief may last weeks or months, but the response is variable. Some patients gain substantial benefit; others notice only a limited change.

Corticosteroid is not usually viewed as a repeated long-term solution for the same joint. The number and timing of injections should be considered carefully, particularly if there is significant joint degeneration, diabetes, a planned operation or other health factors. Blood glucose levels can rise temporarily after a steroid injection, so people with diabetes need individual advice and monitoring.

Hyaluronic acid injections

Hyaluronic acid is a naturally occurring component of joint fluid. Injections are designed to improve the fluid’s cushioning and lubricating properties, potentially easing pain and stiffness in an arthritic joint. Products such as Synolis and Kiomedine are examples of hyaluronic acid treatments that may be considered, particularly for knee osteoarthritis.

These injections do not work immediately for everyone. When they are helpful, improvement often develops gradually over several weeks. They may be a reasonable choice for people seeking an alternative to steroid injection, although the level and duration of benefit differs from person to person. Joint severity, activity levels, previous treatments and expectations all matter.

Platelet-rich plasma, or PRP

PRP uses a concentrated preparation of platelets from your own blood. Platelets contain signalling proteins involved in tissue healing and inflammation regulation. After a blood sample is taken and processed, the PRP is injected into the target joint or tissue.

PRP is increasingly discussed for knee osteoarthritis and tendon problems. Some patients report worthwhile improvements in pain and function, but the research remains mixed and treatment protocols vary. It is not a guaranteed cartilage-regrowth treatment, despite some of the claims made elsewhere. A careful discussion should cover the quality of evidence, likely costs, the number of injections proposed and whether PRP fits your particular presentation.

Arthrosamid

Arthrosamid is a non-biodegradable polyacrylamide hydrogel injection used for knee osteoarthritis. It is intended to integrate into the soft tissue lining of the joint and may offer longer-lasting symptom relief for appropriately selected patients. It is not suitable for every arthritic knee, and it does not replace assessment, strength work or sensible load management.

For someone trying to delay or avoid surgery, it can be a treatment worth discussing. Equally, if pain is largely coming from another source, such as a tendon, bursa, referred spinal pain or a mechanical problem around the knee, a knee injection may not address the real cause. That is why accurate diagnosis comes first.

Why ultrasound guidance matters for arthritis injections

The joint you feel as painful is not always the structure generating the pain. Musculoskeletal ultrasound can assess superficial joints and surrounding soft tissues in real time, identifying features such as fluid, synovial thickening, tendon changes or bursitis. It can also help distinguish whether pain is likely to be arising inside the joint or from nearby structures.

During an ultrasound-guided injection, the clinician can see the needle path and relevant anatomy as treatment is delivered. This supports accurate placement, particularly in smaller, deeper or anatomically complex areas. It can be valuable for joints such as the shoulder, hip, wrist, thumb and knee, as well as for injections around tendons and bursae.

Guidance is not a substitute for clinical judgement. A high-quality assessment still considers your symptoms, movement, strength, medical history and goals. However, for many procedures, seeing the target directly gives both clinician and patient greater confidence that treatment is being delivered where it is intended.

What happens before and after an injection?

Before recommending an injection, a clinician should ask how the problem started, what aggravates it, what treatment you have tried and how it affects work, sleep, exercise and daily tasks. They should also review medicines, allergies, diabetes, anticoagulants, infection risk and any previous response to injections. If appropriate, an ultrasound assessment may be performed at the same appointment.

The procedure itself is usually brief. The skin is cleaned carefully, and local anaesthetic may be used depending on the treatment and area. You may feel pressure or a short-lived sting. Afterwards, it is common to have temporary soreness or a flare in symptoms for a day or two. PRP protocols and post-injection advice can differ from steroid or hyaluronic acid protocols, so follow the specific guidance you are given.

Most people are advised to avoid strenuous activity for a short period, then reintroduce movement in a measured way. This does not mean complete rest for weeks. Gentle mobility and a staged return to normal activity are often more helpful than protecting the joint indefinitely. The right pace depends on the injection, the joint and your starting level of function.

Risks, limits and when to seek advice

Every injection carries some risk. Infection is uncommon but serious, which is why sterile technique and clear aftercare advice are essential. Other possible effects include bleeding or bruising, temporary pain flare, skin or fat changes with steroid injections, and an incomplete or short-lived response. No treatment should be presented as certain to work.

Contact your clinician urgently if you develop increasing redness, heat, marked swelling, fever, feel unwell, or experience severe and worsening pain after an injection. These symptoms need prompt assessment.

It is also sensible to reconsider the diagnosis if an injection has not helped as expected. Persistent pain may be influenced by joint arthritis, but also by weak supporting muscles, tendon disease, nerve irritation, altered movement patterns, sleep disruption or pain sensitivity. Addressing only one element can leave the wider problem unresolved.

Making an injection part of your recovery

The best result from an injection is often not measured only by a pain score. It may be walking around the shops without planning every bench, getting through a working day with less discomfort, returning to the garden, or feeling able to exercise again.

That is where rehabilitation matters. Once pain is more manageable, targeted physiotherapy can help improve joint strength, mobility, balance and confidence. The programme should be realistic: a knee that has been painful for a year will not necessarily tolerate a sudden return to long walks or heavy gym sessions. Small, consistent progress is more likely to last.

If you are considering arthritis injections, seek an assessment that gives you clear choices rather than a standard recommendation. The most useful treatment is the one that fits your diagnosis, health needs and goals – and helps you take a meaningful step towards moving more freely again.