Shoulder Condition

AC Joint Injuries

Symptoms, Diagnosis & Treatment Options

The AC joint sits at the top of the shoulder, where the collarbone meets the shoulder blade. Injuries here range from a mild sprain to a full separation — and most are treated without surgery.

Dr. Yousef Muhammad

German Board Certified Orthopaedic Surgeon | Sports Medicine | Arthroscopy | Joint Replacement

German Board-Certified Orthopaedic Surgeon
DKG Certified Knee Surgeon
AGA Certified Arthroscopic Surgeon
GOTS Certified Sports Physician
FIFA Diploma in Football Medicine
International Experience (Germany & Middle East)
Former Chief of Orthopaedic Surgery (Germany)
14+ Years of Experience

Book Consultation WhatsApp Us

The acromioclavicular (AC) joint is the small joint at the top of the shoulder where the end of the collarbone (clavicle) meets the shoulder blade. Strong ligaments hold the two bones together.

Anatomy diagram

1. Anatomy & Overview

The acromioclavicular (AC) joint is the small joint at the top of the shoulder where the end of the collarbone (clavicle) meets the shoulder blade.

Clinical examination

2. Signs & Symptoms

Pain at the top of the shoulder — right over the joint.

Diagnostic imaging

3. Diagnosis & Imaging

The diagnosis is usually clear from the history and the appearance and tenderness of the joint.

Treatment

4. Treatment Options

Most AC injuries — even those with a visible bump — recover well without surgery.

Rehabilitation

5. Recovery & Rehabilitation

Lower-grade injuries usually settle over a few weeks, with a return to sport once strength and comfortable overhead movement return.

“ Clinical Note from Dr. Yousef Muhammad

The AC joint sits at the top of the shoulder, where the collarbone meets the shoulder blade. Injuries here range from a mild sprain to a full separation — and most are treated without surgery.

Dr. Yousef Muhammad

Consultant Orthopaedic Surgeon

Frequently Asked Questions

What are the symptoms of AC Joint Injuries?

Pain at the top of the shoulder — right over the joint. A visible bump or step — in more significant separations. Pain reaching across the body — or lifting overhead. Tenderness — directly over the end of the collarbone.

What causes AC Joint Injuries?

A fall directly onto the point of the shoulder. Cycling and contact-sport collisions. A direct blow to the top of the shoulder. Reaching across the body under load, irritating an existing joint.

How is AC Joint Injuries diagnosed?

The diagnosis is usually clear from the history and the appearance and tenderness of the joint. X-rays confirm the grade of separation and the position of the collarbone — sometimes taken while holding a weight to reveal the full extent.

How is AC Joint Injuries treated?

Most AC injuries — even those with a visible bump — recover well without surgery. Sling & rehabilitation: Lower-grade injuries settle with a short period in a sling, pain relief, and a graded return to movement and strength. Reconstruction: High-grade separations, or persistent pain and weakness, may be treated by reconstructing the torn ligaments.

What does recovery involve?

Lower-grade injuries usually settle over a few weeks, with a return to sport once strength and comfortable overhead movement return. Surgical cases follow a protected, staged programme over a few months. The outlook is good, with most people regaining a strong, functional shoulder.

Note: This information is for general education only and should not replace a consultation with your doctor.