Injection Therapy

Corticosteroid Injection

A localized anti-inflammatory injection designed to offer temporary relief from acute pain and swelling in select patients.

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What is a Corticosteroid Injection?

A corticosteroid injection (often called a 'steroid' or 'cortisone' injection) involves administering a strong anti-inflammatory medication directly into the knee joint. The primary objective is to manage active inflammation, helping to reduce pain and swelling in patients with conditions like knee osteoarthritis, gout, or acute joint flares.

Procedure & Aftercare Details

Corticosteroid Injection Explanation

1. Joint Anatomy Target

AnatomyClinical Approved

Corticosteroid Injection Target

Clinical illustration of knee joint showing intra-articular target space.

2. Injection Needle Path

Needle PathClinical Approved

Corticosteroid Needle Access Path

Needle trajectory for superolateral approach into the suprapatellar recess.

This outpatient procedure is conducted under strict sterile conditions:

1Clinical assessment and discussion to confirm the injection is indicated.

2Informed consent process reviewing potential benefits, risks, and alternatives.

3Preparation of the skin using a sterile antiseptic solution to minimize infection risk.

4Administration of the injection into the joint space, using anatomical landmarks or ultrasound guidance if clinically appropriate.

5Application of a clean dressing to the site.

6Post-injection advice and review of aftercare guidance before departure.

Clinical AccuracyUltrasound-Guided Injections

We highly recommend executing injections under real-time ultrasound guidance to ensure precise placement within the joint space, maximizing therapeutic safety and efficacy.

Learn About Guidance →

Clinical Characteristics Summary

Onset of Action24-48 hours

Typical Duration6-12 weeks

Primary MechanismRapid anti-inflammatory action

Main IndicationAcute osteoarthritis flares & synovitis

This information is for general patient education and does not replace an individual clinical assessment.

How does it work?

Corticosteroids mimic the actions of natural hormones produced by the adrenal glands to suppress inflammatory pathways. By dampening the local immune response within the knee joint, they help reduce tissue swelling, joint effusion (fluid buildup), and nerve irritation. This localized approach is selected to target symptoms directly within the knee.

Who is this suitable for?

Patients Who May Be Considered

Patients experiencing acute pain and swelling due to inflammatory knee arthritis.
Individuals with severe joint flares where pain restricts basic mobilization.
Those who have not obtained sufficient symptom control from conservative measures like activity modification.
Patients requiring temporary, localized symptom reduction to facilitate active rehabilitation or physiotherapy.

Who May Not Be Suitable

Active or suspected infection within or around the knee joint.
Systemic infections or uncontrolled diabetes mellitus (as steroids can elevate blood glucose levels).
History of hypersensitivity or allergic reaction to corticosteroids or local anaesthetic.
Severe joint destruction or instability where surgical intervention is the appropriate pathway.

Potential Benefits & Risks

Potential Benefits

Potential reduction in severe inflammation and joint swelling.
Temporary relief from acute knee pain in select patients.
Possible improvement in joint range of motion and comfort during daily activities.
May help patients engage more comfortably in active physical therapy programs.

Risks & Limitations

Symptom relief is temporary and the duration of effect varies significantly between individuals.
Repeated injections are generally not recommended due to potential risks of cartilage degeneration and tendon weakening.
Small risk of localized joint infection (septic arthritis), which requires immediate medical attention.
Possible temporary increase in joint pain ('steroid flare') lasting 24 to 48 hours post-injection.
Potential for temporary skin changes, fat atrophy, or depigmentation at the injection site.

What happens during the procedure?

Knee injections are outpatient procedures completed in our sterile clinical rooms. The step-by-step process is detailed in the interactive guide above, including:

1. Preparation & CleaningJoint positioning, skin disinfection, and local anaesthetic.

2. Needle InsertionPrecise injection, often under ultrasound guidance.

3. Dressing & MonitoringSterile dressing applied and post-procedure check.

Needle placement may be performed under real-time imaging guidance depending on clinical indication.Learn about ultrasound-guided knee injections →

After the injection

Aftercare is focused on protecting the joint and monitoring for rare complications. Guidelines are outlined in the interactive tabs above. Remember to rest the joint for the first 48 hours and avoid unaccustomed heavy loads.

Frequently Asked Questions

No. Corticosteroid injections are not a cure for osteoarthritis or other degenerative joint conditions. They do not reverse cartilage wear or repair joint damage; their primary purpose is to manage inflammation and provide temporary symptom relief.

The appointment typically takes 15 to 30 minutes. This includes a clinical review, the consent process, preparation of the sterile field, administering the injection, and discussing aftercare instructions.

It is generally advised to arrange alternative transport or have someone accompany you. If a local anaesthetic is administered alongside the steroid, temporary numbness or altered sensation can affect your leg control, making driving unsafe immediately afterwards.

You should rest the knee and avoid strenuous exercise, running, gym workouts, or high-impact activities for at least 48 hours to minimize local irritation and allow the medication to settle in the joint. You may gradually resume light activities thereafter.

Repeated steroid injections are generally limited. Most clinicians recommend no more than three to four injections in a single joint per year, as excessive steroid exposure can potentially accelerate cartilage wear and weaken surrounding tissues.

Most patients experience a brief stinging sensation during the skin preparation and insertion of the needle. A local anaesthetic is often mixed with the steroid to numb the area, helping to minimize discomfort during the procedure.

Yes, diagnostic imaging (such as an X-ray or MRI) is typically required to confirm the underlying diagnosis and structure of the knee before an injection can be recommended. Injections must be targeted to a clinically verified condition.

In select patients, managing pain and inflammation with an injection may help defer surgery temporarily. However, an injection does not halt the progression of joint wear, and suitability for surgery is determined by a comprehensive specialist assessment.

Which injection may be appropriate?

Choosing an injection therapy requires an individualized clinical assessment. The choice depends upon several factors, including:

Verified clinical diagnosis
Type and severity of symptoms
Diagnostic imaging findings (X-ray, MRI, Ultrasound)
Patient activity levels and functional goals
Previous conservative treatments attempted
Individual medical history, medications, and allergies
Potential clinical risks versus patient-specific benefits
Available non-injection treatment alternatives

⚠️ Only an individual consultation with our consultant orthopaedic surgeon can determine whether a knee injection is clinically appropriate for your condition.

Schedule a Clinical Consultation

To evaluate your knee symptoms and discuss whether an injection therapy is indicated, arrange a specialist consultation.

Call Clinic Book Assessment

Clinically Reviewed

Mr Ricardo J Pacheco (GMC 4145976)Consultant Trauma & Orthopaedic Surgeon

Last reviewed: 29 July 2026

Evidence & References

National Institute for Health and Care Excellence (NICE) Guidelines on Osteoarthritis: care and management.
Royal College of Radiologists / Royal College of General Practitioners guidance on joint injections.
Peer-reviewed clinical literature on the efficacy and safety of intra-articular corticosteroid injections.
Expert consensus on glucocorticoids injection for knee osteoarthritis - PMC (pmc.ncbi.nlm.nih.gov)
Use and safety of corticosteroid injections in joints and ... (rapm.bmj.com)
AAC-Intra-articular-Injections-for-Knee-OA-Updated-August-2020. ... (coa-aco.org)
Efficacy of intra-articular corticosteroid injections in knee ... (sciencedirect.com)
A Systematic Review of Current Clinical Practice Guidelines on Intra ... (journals.sagepub.com)

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Medical Disclaimer

This website provides educational and general information about knee symptoms, conditions, and treatments. The content is for informational purposes only and does not constitute medical advice, diagnosis, or a treatment plan. It should not be used as a substitute for a professional consultation, examination, or clinical decision-making by a qualified orthopaedic specialist.

If you are experiencing symptoms or are concerned about a knee problem, please arrange a clinical consultation. If you have urgent symptoms, severe pain, or are unable to put weight on your leg, please read our urgent advice guidance or contact emergency services immediately (dial 999 or NHS 111).