PRP Therapy for Osteoarthritis Explained

Osteoarthritis can make ordinary tasks feel less ordinary. A sore knee can affect a walk along the foreshore, getting in and out of the car, work on your feet, sleep and confidence to stay active. PRP therapy osteoarthritis treatment is one option some patients consider when ongoing joint symptoms are limiting daily life and first-line measures have not provided enough relief.

Platelet-rich plasma, known as PRP, uses a concentrated portion of your own blood. It is not a cure for osteoarthritis, and it is not suitable for every painful joint. A proper assessment is needed to confirm what is causing the pain, understand the stage of arthritis and discuss whether PRP is a reasonable option alongside exercise, weight management, medication or other treatment.

What is osteoarthritis?

Osteoarthritis is the most common form of arthritis. It involves changes within a joint over time, including cartilage wear, inflammation of the joint lining, bone changes and reduced joint movement. It commonly affects knees, hips, hands, shoulders and the spine.

Symptoms can vary from a mild ache after activity to persistent pain, stiffness after rest, swelling, reduced movement and difficulty with work or exercise. An X-ray may show osteoarthritis, but treatment decisions should not be based on imaging alone. Some people have significant X-ray changes with manageable symptoms, while others have considerable pain despite relatively modest changes on a scan.

Joint pain can also have other causes, including tendon injury, bursitis, inflammatory arthritis, referred pain from the back or a recent injury. This is why a clinical review comes before selecting an injection treatment.

How PRP therapy for osteoarthritis works

PRP is prepared from a small sample of your own blood. The blood is processed in a centrifuge to separate and concentrate platelets in plasma. Platelets contain signalling proteins that are involved in the body's normal healing response.

The prepared PRP is then injected into the affected area, commonly a joint such as the knee. The aim is to influence the local joint environment and reduce symptoms for some patients. PRP does not replace lost cartilage or reverse established osteoarthritis. It should be viewed as a symptom-management treatment that may improve pain and function in selected cases.

Research into PRP for knee osteoarthritis is ongoing. Some studies suggest it can reduce pain and improve function for some people, particularly those with mild to moderate knee osteoarthritis. Results are less predictable in advanced arthritis, and there is less consistent evidence for other joints. Different PRP preparation methods, injection schedules and patient groups also make it difficult to promise a particular result.

For that reason, treatment should be based on your symptoms, examination findings, goals and medical history rather than a one-size-fits-all approach.

Who may be suitable for PRP treatment?

PRP may be discussed for adults with ongoing osteoarthritis pain who have tried appropriate conservative care but remain limited by symptoms. This can include people who have worked on strengthening and activity modification, used suitable pain relief or anti-inflammatory medicines where appropriate, and still cannot comfortably manage daily activities or preferred exercise.

It may be more useful when the pain is clearly coming from the joint being treated and arthritis is not at its most severe stage. For example, a person with knee pain during walking, stairs or work duties may need a review of joint movement, leg strength, alignment, prior injuries and imaging before deciding whether an injection is appropriate.

PRP may not be appropriate for everyone. Your doctor will consider factors such as infection, active cancer treatment, a bleeding disorder, low platelet levels, significant anaemia, use of certain medicines, pregnancy, uncontrolled medical conditions and whether the diagnosis is clear. If surgery is likely to be the most appropriate next step, PRP should not delay a needed orthopaedic assessment.

What happens at a PRP appointment?

The process usually begins with a consultation. Your doctor will ask about the location and pattern of pain, previous injuries, current treatments, work demands and activity goals. They may examine the joint and review available imaging. Further tests or imaging may be recommended where needed.

If PRP is considered appropriate, a small blood sample is taken from your arm. It is processed at the clinic to prepare the platelet-rich plasma. The injection area is cleaned carefully, and the PRP is injected into the planned site. Depending on the joint and clinical circumstances, imaging guidance may be used to support accurate placement.

You may be advised to rest the joint from strenuous activity for a short period after treatment. Most people can manage light daily activities, but returning to running, heavy labour, long shifts, gym training or sport should be gradual and guided by your symptoms and treatment plan. Rehabilitation remains important. An injection alone is unlikely to address weak supporting muscles, poor movement patterns or the demands placed on an irritated joint.

Some treatment plans involve a single injection, while others involve a series. The number of injections depends on the joint, the PRP method used and your clinical situation. This should be discussed before treatment, including expected costs, as PRP is generally not covered by Medicare for osteoarthritis treatment.

Benefits, limits and realistic expectations

The main reason patients consider PRP is the possibility of reducing pain and improving function without surgery. Because it uses your own blood, the risk of allergy to the injected material is low. Some people report gradual improvement over several weeks rather than immediate relief.

However, PRP does not work for everyone. The degree and duration of benefit vary, and some patients notice little change. It does not remove the need for a broader osteoarthritis plan, particularly where weight, muscle strength, work demands or previous joint injury are contributing to symptoms.

It is also worth considering the alternatives. A well-designed exercise program can improve pain and function, even when arthritis is established. Physiotherapy may help with strength, balance, pacing and return to activity. Weight reduction, where clinically appropriate, can reduce load through weight-bearing joints. Medicines, braces, walking aids, corticosteroid injections or referral for surgical opinion may also have a place depending on the joint and severity of symptoms.

The right treatment is not necessarily the newest treatment. It is the option that best matches your diagnosis, health needs, goals and likely benefit.

Side effects and when to seek advice

It is common to have temporary soreness, swelling or stiffness around the injection site. Some people experience a flare of joint pain in the first few days. Your doctor will provide individual aftercare advice, including which pain relief options are suitable for you and whether to avoid anti-inflammatory medicines around the procedure.

Contact the clinic promptly if you develop increasing redness, marked swelling, fever, feeling unwell, severe pain that is not settling, numbness or any other concerning symptoms after an injection. Infection is uncommon but requires urgent assessment.

Preparing for a PRP consultation

Bring or arrange access to relevant X-rays, scans and reports if you have them. It is also helpful to make a note of when the pain occurs, what activities you have reduced or stopped, previous injections or operations, and all medicines and supplements you take.

Be clear about your goal. It may be returning to walking comfortably, managing stairs at home, staying active at work or preparing for a planned holiday. A realistic goal helps your doctor assess whether PRP therapy for osteoarthritis is likely to be worthwhile in your circumstances.

At 121 Medical Centre, PRP treatment can be considered as part of a broader assessment of musculoskeletal pain and function. Booking a consultation allows time to confirm the diagnosis, discuss your options and make a plan that is practical for your joint, your work and your everyday life.