ABC Medical Center > Diseases > Acromioclavicular Osteoarthritis

What is acromioclavicular osteoarthritis?

9 October 2025

Acromioclavicular osteoarthritis refers to the degeneration of the cartilage in the joint that connects the tip of the clavicle to the acromion, usually due to overuse. This condition causes pain during certain movements, inflammation, and stiffness. It is commonly seen in high-performance athletes, bodybuilders, and people who frequently use their arms in daily activities.

Acromioclavicular Joint

The acromioclavicular joint connects the acromion (on the scapula) with the clavicle and is located at the front of the shoulder. Despite its small size, it can withstand significant compressive, sliding, and rotational forces. Starting around age 40, when degenerative changes typically begin, this joint can start to wear down, although only some individuals experience shoulder pain and osteoarthritis symptoms.

Types of Acromioclavicular Osteoarthritis:

  • Primary acromioclavicular osteoarthritis: Common in adults aged 40 and older. It may be associated with rotator cuff injuries.
  • Post-traumatic acromioclavicular osteoarthritis: Occurs after trauma to the joint, such as an acromioclavicular dislocation.

Signs and symptoms Acromioclavicular Osteoarthritis

Common symptoms include:

  • A noticeable bump on the clavicle.
  • Sharp shoulder pain.
  • Pain when touching the joint.
  • Pain radiating to the neck and head.
  • Pain when lifting or rotating the arm above the head or trying to touch the opposite shoulder.
  • Pain even at rest or when lying on the affected shoulder.
  • Bone spurs or calcifications below the joint that may damage the rotator cuff.

Treatment Acromioclavicular Osteoarthritis

After evaluating your symptoms and medical history, a specialist will conduct a physical exam to assess your shoulder’s mobility and the level of pain. Imaging tests may be ordered to confirm the diagnosis and rule out other shoulder injuries, including:

  • Ultrasound
  • X-rays
  • MRI

Although acromioclavicular osteoarthritis cannot be cured, timely and appropriate treatment can significantly reduce pain and improve shoulder mobility. Treatment options may include:

  • Pain relievers
  • Anti-inflammatory medications
  • Corticosteroid injections into the joint
  • Physical therapy and rehabilitation
  • Exercise routines to strengthen muscles, ligaments, and joints

If there is no improvement with conventional treatment, shoulder arthroscopy may be necessary to remove damaged tissue from the clavicle, reducing friction with the acromion and alleviating pain.

Recovery from surgery typically takes four to six months, allowing ligaments and soft tissues to heal and naturally stabilize the joint. Physical therapy and rehabilitation are essential to regain optimal mobility and strength.

At the Orthopedics and Traumatology Center of ABC Medical Center, we offer specialized care contact us!

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    Ricardo Ostos

    Ricardo Ostos

    Content Creator

    Ricardo can convey complex medical information in an accessible and friendly way so that all of our patients can understand and benefit from it. In addition, he has an empathetic approach, offering information and practical advice that really makes a difference in people's lives. #lifebringsustogether.

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