Injection Therapy: What It Is, How It Works and Who It May Help

Injection therapy can be used to manage certain types of joint, tendon and muscle pain when a targeted treatment is appropriate. In the UK, injection therapy is also within the scope of physiotherapy practice for appropriately trained and competent physiotherapists, subject to the relevant medicines framework, clinical setting and individual scope of practice.

For patients in Preston and across Lancashire, the term can raise a few obvious questions. What exactly is being injected? Does it hurt? Is it suitable for my condition? And can a physiotherapist actually provide it?

The answer depends on the diagnosis, the type of injection and the clinician providing the treatment.

What is Injection Therapy?

Injection therapy involves delivering a medicine or other therapeutic product directly into a specific area, such as a joint, tendon or surrounding soft tissue. In physiotherapy practice, this may include corticosteroids, local anaesthetic, botulinum toxin and certain medical devices, depending on the clinical indication and the practitioner's training and scope. Joint aspiration may also form part of injection therapy.

The aim is usually targeted treatment.

For example, a corticosteroid injection can reduce inflammation and pain around a painful joint or tendon, potentially making movement and rehabilitation easier. NHS guidance lists conditions including painful joints, tendons and bursitis among situations where hydrocortisone injections may be used.

What Conditions May Require Injection Therapy?

Not every painful condition needs an injection. In fact, injections are generally considered when they are clinically appropriate rather than as a first response to every ache or injury.

Depending on the type of injection and the diagnosis, injection therapy may be considered for conditions involving:

• Painful or inflamed joints

• Bursitis

• Certain tendon-related problems

• Inflammatory musculoskeletal conditions

• Some chronic pain conditions

• Muscle overactivity associated with particular neurological or musculoskeletal conditions

Corticosteroid injections, for example, are used for certain painful and swollen joints and tendons and may help reduce pain and swelling.

A proper assessment comes first. The injection should address a specific clinical problem, not simply the presence of pain.

Can a Physiotherapist Do Injections?

Yes, appropriately trained physiotherapists in the UK can undertake therapeutic injection therapy within their scope of practice.

The Chartered Society of Physiotherapy states that injection therapy for therapeutic purposes is within the scope of physiotherapy practice. Physiotherapists may use licensed medicines such as corticosteroids, local anaesthetic and botulinum toxin, as well as certain licensed medical devices, where appropriate. Additional training and competence are required.

This does not mean every physiotherapist provides injections.

The practitioner must have appropriate training, competence, insurance and a suitable clinical framework. Whether a particular physiotherapist can prescribe, supply or administer a medicine also depends on the relevant UK medicines framework.

What Types of Injections Are Used?

"Injection therapy" is a broad term rather than the name of one particular treatment.

Depending on the condition, examples can include:

Type	General purpose
Corticosteroid injections	Reduce inflammation and associated pain
Local anaesthetic	Temporarily numb an area and reduce pain
Botulinum toxin	Used for certain muscle overactivity, spasticity and other specific conditions
Medical-device/orthobiologic products	Used in selected clinical situations
PRP	Uses concentrated platelets from the patient's own blood and has specific regulatory requirements in the UK

PRP, in particular, should not be treated as interchangeable with a standard steroid injection. The CSP states that physiotherapist administration of PRP has specific requirements and must be under the direction of a doctor who manufactured the product.

Does Injection Therapy Hurt?

Usually, there is some discomfort. The needle itself may cause a brief sharp sensation, pressure or stinging.

Some injections may include a local anaesthetic to reduce discomfort. NHS guidance notes that hydrocortisone injections can be uncomfortable, although local anaesthetic may sometimes be used.

There is another point patients are sometimes surprised by: pain can temporarily increase after an injection.

A steroid flare can cause increased pain and swelling for a short period before symptoms settle. NHS information says this generally improves within a few days.

What to Expect Before Treatment

A responsible injection appointment starts with assessment, not a syringe.

Your clinician should discuss your symptoms, medical history, medications, previous treatments and the reason an injection may be appropriate. Factors such as infection, allergies, diabetes, pregnancy, recent vaccination, anticoagulant medication and other medical conditions may affect whether an injection is suitable.

You should also have an opportunity to discuss:

• Why the injection has been recommended

• What product is being used

• Expected benefits

• Possible risks

• What you should do afterwards

• Whether physiotherapy or exercise will form part of your recovery

Recovery After Injection Therapy

Recovery varies depending on the injection and the area treated.

With corticosteroid injections, some people notice improvement within a few days, while others take longer. NHS guidance notes that the benefit can last for several weeks or months, although the response varies between individuals.

You may be advised to rest the treated area initially and avoid heavy or aggravating activity. After that, gradual return to normal activity is generally encouraged according to the condition and clinical advice.

This is where physiotherapy can play an important role.

Reducing pain is useful, but the bigger objective may be restoring movement, strength, load tolerance and confidence so that the underlying problem is properly managed.

Possible Risks and Side Effects

Like any invasive procedure, injection therapy carries risks.

Common or temporary effects can include:

• Pain or soreness around the injection site

• Bruising

• Temporary swelling

• A short-term increase in pain

• Skin colour changes in some cases

Less common but more serious complications can include infection or an allergic reaction. Certain injections may also have specific risks, so your clinician should explain these before treatment.

Seek medical advice if the treated area becomes increasingly hot, swollen and painful, particularly if you also feel unwell or develop a fever.

Who May Benefit from Injection Therapy?

Injection therapy may be considered when:

• Pain or inflammation is limiting normal movement

• Conservative treatment has not provided enough relief

• A targeted treatment is clinically appropriate

• Reducing pain could help the patient participate more effectively in rehabilitation

• The diagnosis and expected benefits support the procedure

It is not suitable for everyone, and an injection is not a guaranteed solution.

At ActivLiving Physiotherapy in Preston, the most useful question is therefore not simply, "Can I have an injection?"

It is:

"Is injection therapy appropriate for my condition, and how can it fit into my overall recovery plan?"

A well-planned treatment approach considers the injection, rehabilitation, exercise, activity levels and the patient's individual goals together.