Hyaluronic acid (HA) injections — sometimes called viscosupplementation — are used to reduce joint pain and improve movement, most commonly in the knee. They are especially helpful for people with osteoarthritis or cartilage wear.
What Is Hyaluronic Acid?
Hyaluronic acid is a naturally occurring substance found in healthy joints.
It acts as:
- A lubricant, helping joints move smoothly
- A shock absorber, protecting cartilage during movement
In conditions like osteoarthritis, the amount and quality of hyaluronic acid in the joint decreases, leading to:
- Pain
- Stiffness
- Grinding or clicking
- Reduced mobility
How Is It Different from a Steroid Injection?
| Steroid Injection | Hyaluronic Acid Injection |
|---|---|
| Reduces inflammation | Improves lubrication |
| Works quickly | Works gradually |
| Short-term relief | Longer-lasting support |
| Best for flare-ups | Best for ongoing joint wear |
How the Injection Helps
When hyaluronic acid is injected into the joint, it works in several ways:
1. Improves Joint Lubrication
The injection thickens the joint fluid, allowing the bones to glide more smoothly and reducing friction during walking and movement.
2. Absorbs Shock
It cushions the joint, helping reduce stress on damaged cartilage during everyday activities.
3. Reduces Pain and Stiffness
Better lubrication and cushioning lead to less irritation of the joint lining, easing pain and stiffness over time.
4. Supports Joint Health
Hyaluronic acid may help calm inflammation and support the joint’s natural repair environment.
Why Ultrasound Guidance Matters
At Alton Pain Clinic, hyaluronic acid injections are performed under ultrasound guidance, which ensures:
- Accurate placement inside the joint
- Better distribution of the medication
- Reduced discomfort during the procedure
- Improved treatment effectiveness
Precise placement is key — especially in arthritic joints where anatomy may be altered.
When Does It Start Working?
Unlike cortisone, hyaluronic acid does not give immediate relief.
- Improvement usually begins within 2–4 weeks
- Pain relief can last several months
- Many patients notice gradual improvement in walking comfort and flexibility
Who Is It Best For?
Hyaluronic acid injections are commonly recommended for:
- Mild to moderate knee osteoarthritis
- Patients who cannot tolerate steroid injections
- Those looking to delay or avoid surgery
Is It Safe?
Yes. Hyaluronic acid is very safe and well tolerated.
Possible temporary effects:
- Mild swelling
- Aching for 24–48 hours
- Feeling of fullness in the joint
Serious side effects are rare.
Aftercare
- Gentle walking is encouraged
- Avoid high-impact activity for 48 hours
- Gradually return to normal activity
Your clinician at Alton Pain Clinic will give personalised advice.
Book an Assessment at Alton Pain Clinic
If knee pain is affecting your quality of life, ultrasound-guided hyaluronic acid injections may help restore smoother movement and lasting relief.
Frequently Asked Questions
What are hyaluronic acid injections used for?
They are used to reduce joint pain and stiffness, most commonly in knee osteoarthritis, by improving lubrication and cushioning inside the joint.
How do hyaluronic acid injections work?
They replace and supplement the joint’s natural fluid, helping the joint move more smoothly and absorb shock during walking and daily activities.
How is this different from a steroid injection?
Steroid injections reduce inflammation quickly, while hyaluronic acid improves joint lubrication and provides longer-term support. HA works more gradually.
How long does it take to work?
Most patients notice improvement within 2–4 weeks, with benefits often lasting several months.
How long do the effects last?
Pain relief typically lasts 3–6 months, and sometimes longer, depending on joint condition and activity level.