Joint Injection

Introduction

If your doctor has suggested a joint injection, you are likely dealing with joint pain that has not settled with rest, oral medicines, or physiotherapy alone. A joint injection is a short, minimally invasive procedure in which medicine is placed directly into the affected joint — for example the knee, shoulder, hip, ankle, wrist, or small joints of the hand or foot.

This guide explains what a joint injection is, why doctors use it, the different types of injections you may be offered, how the procedure is done, what recovery looks like, and what risks and outcomes to expect. It is written for patients who already have a diagnosis such as osteoarthritis, rotator cuff tendinopathy, frozen shoulder, or another joint problem, and who are now planning the next step in treatment.

What Is a Joint Injection?

A joint injection is a procedure in which a thin needle is used to deliver medicine into the joint space (intra-articular injection) or into the soft tissues immediately around the joint, such as a tendon sheath or bursa. The aim is to reduce pain and inflammation, improve movement, and in some cases help the doctor confirm where pain is coming from.

A joint injection is not surgery. Nothing is cut, removed, or repaired. Most injections take only a few minutes and are done in an outpatient clinic or day-care setting, with the patient going home the same day.

Joint Injection vs. Joint Surgery

Joint injections sit between simple measures such as physiotherapy and oral medicines on one side, and joint surgery (such as arthroscopy or joint replacement) on the other. For some patients with mild to moderate joint disease, injections offer meaningful relief and may allow them to delay or avoid surgery. For others with advanced disease, injections may be one part of a longer plan that eventually includes surgery.

Why Is a Joint Injection Performed?

Doctors use joint injections for two broad reasons: to relieve symptoms (therapeutic) and to help work out where pain is coming from (diagnostic).

Therapeutic Reasons

The most common reason for a joint injection is to reduce pain and inflammation in a specific joint or soft-tissue structure. Conditions doctors commonly treat with injections include:

• Osteoarthritis — wear-and-tear arthritis, most often of the knee, hip, shoulder, or base of the thumb
• Rheumatoid arthritis and other inflammatory arthritis — where one or two joints flare despite overall disease control
• Frozen shoulder (adhesive capsulitis)
• Rotator cuff tendinopathy and subacromial bursitis of the shoulder
• Trochanteric bursitis of the hip
• Tennis elbow and golfer’s elbow (lateral and medial epicondylitis)
• De Quervain’s tenosynovitis and other tendon sheath inflammation
• Trigger finger
• Carpal tunnel syndrome
• Plantar fasciitis and ankle joint pain
• Sacroiliac joint pain and certain types of back pain (often done by pain specialists with imaging guidance)

Diagnostic Reasons

Sometimes the source of pain is not clear from examination and scans alone. Numbing medicine (a local anaesthetic) injected into a specific joint or bursa can help confirm whether that structure is the actual source of pain. If pain settles for the duration the local anaesthetic is active, the structure is likely involved. This is sometimes called a diagnostic block.

Who Is a Candidate?

A joint injection may be considered when:

• Pain limits daily activities, sleep, or work
• You have tried simpler measures — activity modification, physiotherapy, oral pain medicines — with limited benefit
• Imaging and examination point to a specific joint or soft-tissue structure as the source of pain
• Surgery is not yet needed, not yet appropriate, or you and your doctor wish to try less invasive options first
• You need temporary relief to take part in rehabilitation or physiotherapy

Joint injections may not be appropriate, or may need to be delayed, if you have:

• An active infection in or near the joint, or any active skin infection over the injection site
• Fever or a suspected joint infection (this needs urgent evaluation, not a steroid injection)
• A bleeding disorder or you are taking blood-thinning medicines (your doctor will decide whether adjustments are needed)
• Poorly controlled diabetes — steroid injections can raise blood sugar temporarily
• An allergy to the planned injection medicine
• A prosthetic (artificial) joint — injections into joint replacements are usually avoided because of infection risk, unless done in very specific circumstances

Pregnancy, certain immune-suppressing medicines, and a recent steroid injection in the same joint are also factors your doctor will weigh.

Alternatives to Joint Injection

Joint injections are one part of a wider range of treatments. Depending on your condition, your doctor may suggest trying or continuing several of the following before, alongside, or instead of injections.

Lifestyle and Self-management

• Weight management — reducing load on weight-bearing joints, particularly the knee and hip, is one of the most consistently evidence-based measures for osteoarthritis
• Activity modification — avoiding the specific movements or loads that flare the joint while staying generally active
• Footwear, insoles, and walking aids — especially for knee, hip, ankle, and foot problems

Physiotherapy and Exercise

Major orthopaedic and rheumatology societies, including the American Academy of Orthopaedic Surgeons (AAOS) and the American College of Rheumatology (ACR), consistently place exercise and physiotherapy as core, first-line treatments for osteoarthritis and many soft-tissue conditions. A structured programme of muscle strengthening, range-of-motion work, and aerobic activity often improves pain and function over weeks to months.

Oral and Topical Medicines

• Topical anti-inflammatory gels — often a first option for knee and hand osteoarthritis
• Oral anti-inflammatory medicines (NSAIDs) — used for short periods, with care in patients with kidney, stomach, or heart conditions
• Paracetamol — modest benefit but a safer option for some patients
• Disease-modifying medicines — for rheumatoid arthritis and other inflammatory diseases, treating the underlying condition is the priority

Other Procedures and Surgery

• Arthroscopy — keyhole surgery to address specific structural problems
• Osteotomy — realigning a bone to offload a damaged part of a joint, used in selected younger patients
• Joint replacement (arthroplasty) — for advanced joint disease where pain and function are no longer acceptable

Whether a joint injection is the right next step, or whether another option fits better, is a decision to make with your treating doctor based on your diagnosis, the joint involved, and what you have already tried.

Types of Joint Injections

Corticosteroid Injections

Corticosteroids (often shortened to “steroids”) are strong anti-inflammatory medicines. A small amount is injected, often mixed with a local anaesthetic. These are the most commonly used joint injections worldwide.

• Best known for: reducing inflammation quickly in osteoarthritis flares, frozen shoulder, bursitis, tendon sheath inflammation, and inflammatory arthritis flares in a single joint
• Onset of relief: usually within a few days, sometimes within hours
• Duration of relief: typically several weeks to a few months; variable between patients and conditions
• Frequency: doctors generally avoid repeating steroid injections in the same joint at short intervals; many guidelines suggest waiting at least three months between injections in the same joint, and limiting the total number per year

Concerns about repeated steroid injections include possible thinning of nearby tissues, skin colour change at the injection site, and, with frequent use in weight-bearing joints, potential effects on cartilage. These are part of why injections are spaced and limited.

Hyaluronic Acid (Viscosupplementation) Injections

Hyaluronic acid is a substance naturally present in synovial fluid that helps lubricate and cushion the joint. In viscosupplementation, a hyaluronic acid preparation is injected into the joint, most commonly the knee.

• Used mainly for: knee osteoarthritis; sometimes hip, shoulder, or ankle osteoarthritis
• Onset of relief: slower than steroids — often a few weeks
• Duration of relief: may last several months in patients who respond
• Evidence: guideline groups differ in their views. Some, such as AAOS, do not strongly recommend hyaluronic acid for knee osteoarthritis based on current evidence, while it remains in routine use in many centres for selected patients. Your doctor can explain how this applies to your situation.

Platelet-Rich Plasma (PRP) Injections

• Often considered for: knee osteoarthritis, tennis elbow, certain tendon problems, and some sports injuries
• Onset of relief: gradual, often over several weeks
• Evidence: studies show mixed but generally encouraging results in certain conditions, particularly knee osteoarthritis and lateral epicondylitis. PRP preparations vary between centres, which makes comparing studies difficult.
• Status: in routine clinical use in many orthopaedic and sports medicine practices, though not yet first-line in most major guidelines

Local Anaesthetic-Only Injections

Sometimes only a local anaesthetic is injected, particularly as a diagnostic block to confirm the source of pain. Relief is short (hours), but the information it gives can be useful in planning further treatment.

Other and Emerging Options

Several newer injectables are being studied or used in selected centres, including certain regenerative therapies. Stem cell-based injections, in particular, remain investigational for most joint conditions and are subject to specific regulatory restrictions. Whether such options apply to you is a question for a specialist familiar with both your condition and current evidence.

Preparing for a Joint Injection

Preparation for a joint injection is usually simple, but a few details matter.

Before the Appointment

• Share a complete list of your medicines, including blood thinners (such as warfarin, clopidogrel, apixaban, rivaroxaban), insulin and diabetes medicines, and any allergies
• Tell your doctor about any infection, fever, recent illness, or skin problem near the joint
• Mention previous injections in the same joint, including when they were given and how well they worked
• For people with diabetes, plan to monitor blood sugar more closely for a few days after a steroid injection, as levels can rise temporarily
• Arrange for someone to drive you home if you are having an injection into a weight-bearing joint or if sedation is planned (sedation is rarely needed)

On the Day

• You can usually eat and drink normally before the procedure
• Wear loose, comfortable clothing that gives easy access to the joint
• Continue your usual medicines unless told otherwise — in particular, do not stop blood thinners on your own without your doctor’s advice

What Happens During a Joint Injection

A joint injection is usually a quick procedure, done in a clinic room or minor procedure room.

Step-by-Step

1. Positioning: you are placed in a position that gives clear access to the joint — for example, sitting for a shoulder injection or lying down for a knee or hip injection.
2. Cleaning the skin: the area is cleaned with an antiseptic solution to reduce infection risk.
3. Numbing (optional): the doctor may use a cooling spray or inject a small amount of local anaesthetic into the skin to reduce the pinch of the needle.
4. Imaging guidance (when used): for deep joints (hip, sacroiliac joint, some shoulder injections) or when accuracy matters, the doctor may use ultrasound or X-ray (fluoroscopic) guidance to place the needle precisely.
5. Needle placement: a thin needle is gently inserted into the joint space or target tissue. If there is extra fluid in the joint, the doctor may first draw some of it out (called aspiration) before injecting the medicine.
6. Injecting the medicine: the medicine is delivered slowly. You may feel a sense of pressure or fullness.
7. Finishing: the needle is removed, the area is wiped, and a small dressing or bandage is applied.

The whole procedure typically takes about 10 to 20 minutes. The injection itself is usually over within a minute or two.

Does It Hurt?

Most people describe a brief pinch and a feeling of pressure rather than severe pain. Discomfort varies by joint — small joints in the hand or foot can be more tender than the knee, for example. Local anaesthetic and good technique keep most injections well tolerated.

Recovery After a Joint Injection

Recovery from a joint injection is generally quick and most people return home the same day, walking out of the clinic.

The First 24 to 48 Hours

• Soreness at the injection site is common and usually settles in a day or two. An ice pack over the area for 10–20 minutes at a time can help.
• Steroid flare — a small number of people experience a temporary increase in pain in the first 24–48 hours after a steroid injection. This usually settles on its own.
• Activity: doctors commonly advise avoiding strenuous activity and heavy loading of the joint for one to two days. Gentle, normal use is fine.
• Skin care: keep the area clean and dry until the small puncture site has sealed (usually a few hours). Avoid swimming pools or hot tubs for 24–48 hours.

Days to Weeks After

• With a steroid injection, pain relief usually begins within a few days and may continue to improve over one to two weeks
• With hyaluronic acid or PRP, improvement is more gradual, often over several weeks
• Many doctors recommend pairing the injection with physiotherapy, particularly for shoulder, hip, and knee conditions. A reduction in pain often makes rehabilitation exercises more effective.

When to Contact Your Doctor

Most patients have no problems after an injection. Contact your doctor promptly if you notice:

• Increasing pain, redness, swelling, or warmth in the joint beyond 48 hours
• Fever or chills
• Pus or discharge from the injection site
• Sudden severe pain or inability to move the joint

These can be signs of joint infection (septic arthritis), which is rare but needs urgent assessment.

Risks and Complications

Joint injections are generally considered safe when done by trained clinicians using sterile technique. As with any procedure, there are possible risks.

Common, Usually Mild

• Soreness at the injection site for a day or two
• Temporary increase in pain (steroid flare) in the first 1–2 days after a steroid injection
• Small bruise at the injection site
• Temporary rise in blood sugar after a steroid injection, especially in people with diabetes
• Facial flushing or feeling warm for a day or two after a steroid injection

Less Common

• Thinning or lightening of the skin and underlying fat at the injection site, especially with repeated steroid injections in superficial areas
• Tendon weakening if steroid is injected directly into a tendon — doctors typically inject around, not into, tendons
• Allergic reaction to the injected medicine
• Temporary disturbance of menstrual cycle after steroid injections in some women

Rare but Serious

• Joint infection (septic arthritis): very rare with sterile technique but a serious complication that requires urgent treatment
• Nerve or blood vessel injury: rare, more relevant in deep or complex injections; imaging guidance reduces this risk
• Cartilage effects with repeated steroid injections: a concern with frequent injections in weight-bearing joints, which is one reason injections are spaced and limited

Your doctor will weigh these risks against the expected benefit for your specific situation.

What Outcomes to Expect

Outcomes vary by condition, joint, medicine used, and individual factors. In general:

• For osteoarthritis flares, steroid injections often provide several weeks to a few months of meaningful relief, which can help patients return to physiotherapy and daily activity.
• For frozen shoulder, early steroid injection combined with physiotherapy often shortens the painful phase.
• For trigger finger, tennis elbow, De Quervain’s, and similar soft-tissue conditions, a single injection resolves symptoms in many patients; some need a repeat injection or, eventually, a small surgical procedure.
• For knee osteoarthritis treated with hyaluronic acid, some patients report several months of improvement; others see little change.
• For PRP in selected conditions, improvement is typically gradual over weeks, and effects may last several months in patients who respond.

Injections do not reverse underlying joint damage. They reduce pain and inflammation, which often allows better function and better engagement with exercise and rehabilitation. For some patients, this is enough to delay surgery for months or years; for others, an injection is a temporary bridge to a planned operation.

Life After a Joint Injection

A joint injection is one piece of a longer plan to look after the joint.

Continuing Rehabilitation

Pain relief from an injection is most useful when paired with strengthening and movement work. Major society guidelines emphasise that exercise and physiotherapy remain the foundation of long-term joint care for arthritis and most soft-tissue conditions, even when injections are part of the plan.

Healthy Joint Habits

• Maintain a healthy body weight to reduce load on weight-bearing joints
• Build a regular exercise routine that includes strengthening, range-of-motion, and low-impact aerobic activity
• Use supportive footwear; consider walking aids if recommended
• Pace activity — alternate between active and rest periods, particularly during flare-ups
• Manage other health conditions (diabetes, high blood pressure, smoking, inflammatory disease) that affect joint health and recovery

Spacing of Future Injections

If your treatment plan may include further injections, your doctor will space them based on the type used, the joint, and your overall plan. Steroid injections in the same joint are typically spaced several months apart, with attention to total cumulative exposure.

Planning for Possible Surgery

If joint disease is advanced or progressing, an injection is one step on the way to a longer-term decision. If joint replacement may be needed in the future, let your future surgical team know about recent steroid injections, as some surgeons prefer to wait a certain period after an injection before doing joint replacement to reduce infection risk.

Joint Injections in Children

Most joint injections are given to adults. In children, injections are used in specific situations, most often for juvenile idiopathic arthritis, where injecting an inflamed joint can help control disease and protect joint development. These injections are usually planned by paediatric rheumatologists and may be done under sedation or anaesthesia depending on the child’s age and the joint involved. Sports injuries and other soft-tissue conditions in children and adolescents are usually managed first with rest, physiotherapy, and bracing rather than injections.

Frequently Asked Questions

Will a joint injection cure my arthritis?

No. Joint injections do not reverse arthritis or rebuild lost cartilage. They reduce pain and inflammation, often allowing better movement and easier engagement with exercise. They are one tool among several.

How long does relief last?

It depends on the medicine, the condition, and the individual. Steroid injections often help for several weeks to a few months. Hyaluronic acid and PRP can provide more gradual but sometimes longer relief in patients who respond. Some people get strong, lasting benefit; others see little.

How many injections can I have in the same joint?

For steroid injections, many doctors limit them to a few per joint per year, often with a gap of at least three months between injections in the same joint. The exact plan depends on the joint, the medicine, and your overall situation.

Will I need physiotherapy after the injection?

Often, yes. Doctors commonly pair injections with physiotherapy, because the pain relief from the injection creates a window to do strengthening and movement work more effectively.

Is the procedure painful?

Most people describe a brief pinch and a sense of pressure rather than severe pain. Skin numbing and good technique keep discomfort modest. Some joints, particularly small ones, can be more tender than others.

Can I drive home afterwards?

For most upper-body injections, yes. For injections into weight-bearing joints such as the hip or knee, especially with local anaesthetic, your doctor may advise arranging transport for the day of the procedure.

What if my blood sugar goes up after a steroid injection?

A temporary rise in blood sugar is common after a steroid injection. If you have diabetes, monitor your levels more closely for a few days and follow your usual care team’s advice on adjustments.

Can a joint injection delay or avoid joint replacement?

For some patients with mild to moderate joint disease, injections combined with physiotherapy and lifestyle measures help delay surgery, sometimes for years. For patients with advanced disease, injections may give temporary relief but are not a substitute for surgery if it is needed.

Are joint injections safe during pregnancy?

This is a decision for your doctor based on your specific situation. Some injections are avoided or postponed during pregnancy; others may be considered when symptoms are severe.

Conclusion

A joint injection is a short, minimally invasive procedure that can play a useful role in managing joint pain from arthritis, inflammation, and a range of soft-tissue conditions. The different types of injections — corticosteroid, hyaluronic acid, platelet-rich plasma, and others — work in different ways, with different timelines and different supporting evidence. The right choice, if any, depends on your diagnosis, the joint involved, your overall health, and what you have already tried.

For most patients, an injection is one step in a longer plan that also includes physiotherapy, exercise, weight management, and care of other health conditions. Talking through expected benefits, the realistic duration of relief, the timing of any repeat injections, and how the injection fits into a longer-term plan with your treating doctor will help you make the decision that is right for your joint and your life.