Most AC (acromioclavicular) joint injuries are not permanent. Mild to moderate injuries usually heal within weeks to a few months. However, some people develop persistent AC joint pain or arthritis, which may require targeted treatment such as ultrasound-guided cortisone or hyaluronic acid injections.
An acromioclavicular (AC) joint injury, sometimes called a shoulder separation, affects the small joint at the top of the shoulder where the collarbone meets the shoulder blade. It is a common cause of pain at the top of the shoulder, particularly after a fall or direct impact.
A frequent concern patients have is whether the damage is permanent.
The answer depends on the severity of the injury and how it heals.
At Alton Pain Clinic, we provide ultrasound-guided AC joint injections in Alton, including cortisone and hyaluronic acid treatments, to manage persistent symptoms.
Do AC Joint Injuries Heal?
Mild Injuries (Grade I–II)
- Ligaments are stretched or partially torn
- Pain and swelling settle gradually
- Recovery typically occurs within 2–8 weeks
- Most patients regain full function
These injuries are not permanent.
Moderate to Severe Injuries (Grade III+)
- Complete ligament tear
- Visible bump at the top of the shoulder
- Longer recovery time (6–12+ weeks)
Even in more severe cases, the injury itself is not necessarily permanent. However, the joint may remain slightly prominent or develop ongoing irritation.
Why Some People Have Long-Term Symptoms
Although the ligaments may heal, some patients develop:
- Chronic AC joint inflammation
- Persistent tenderness
- Pain when reaching across the body
- AC joint arthritis
- Night shoulder pain
This does not mean the injury is “permanent,” but rather that inflammation or degenerative change has developed within the joint.
Treatment We Offer at Alton Pain Clinic
1. Ultrasound-Guided Cortisone Injections
Cortisone is a powerful anti-inflammatory medication injected directly into the AC joint under ultrasound guidance.
Benefits:
- Rapid reduction in inflammation
- Effective pain relief
- Improved shoulder movement
- Helps settle flare-ups
Ultrasound guidance ensures precise placement within the small AC joint, improving accuracy and effectiveness.
2. Ultrasound-Guided Hyaluronic Acid Injections
Hyaluronic acid acts as a lubricant within the joint. It is particularly beneficial in:
- Post-traumatic AC joint pain
- Degenerative AC joint arthritis
- Chronic joint irritation
Benefits:
- Improved joint cushioning
- Reduced friction
- Longer-lasting relief in selected cases
This treatment can be especially helpful when inflammation has settled but joint irritation persists.
When to Seek Specialist Treatment
You should consider assessment if:
- Pain persists beyond 6 weeks
- There is ongoing tenderness at the top of the shoulder
- Sleep is disturbed
- Daily activities remain limited
At Alton Pain Clinic, we provide ultrasound-guided AC joint injections in Alton to accurately target the source of pain and optimise recovery.
Key Takeaway
Most AC joint injuries are not permanent. Mild and moderate injuries usually heal within weeks.
However, some patients develop ongoing AC joint pain or arthritis. In these cases, ultrasound-guided cortisone injections and hyaluronic acid injections can significantly reduce inflammation and improve shoulder function.
If you continue to experience pain at the top of the shoulder, assessment and targeted treatment may help prevent long-term discomfort.
Frequently Asked Questions
Can an AC joint injury cause permanent damage?
Most injuries heal, but some patients may develop chronic inflammation or arthritis.
How long does AC joint pain last?
Mild injuries settle within weeks. Persistent pain beyond 6–8 weeks may require treatment.
Are injections effective for chronic AC joint pain?
Yes. Ultrasound-guided cortisone and hyaluronic acid injections can significantly reduce inflammation and discomfort.