AC Separation

An acromioclavicular (AC) sprain, commonly referred to as a shoulder separation, involves injury to the ligaments that connect the collarbone (clavicle) to the acromion, the outer tip of the shoulder blade. This type of injury often occurs during contact sports such as football or hockey, particularly following a direct impact to the shoulder. The severity of an AC separation can vary, ranging from mild stretching or fraying of a single ligament to complete rupture of the supporting ligaments. Injuries are classified into grades based on the extent of ligament damage. Common symptoms include shoulder pain, swelling, and, in some cases, a visible bump at the top of the shoulder.

Care typically focuses on non-invasive management and may include rest, guided exercises, therapeutic modalities, and temporary use of a sling to support the shoulder during early healing. Applying ice for 10–15 minutes at a time may help reduce pain and swelling, particularly in the initial phase. Activity modification is important early on, especially avoiding overhead movements or reaching across or behind the body. Mild AC separations often improve within one to two weeks, while more significant injuries may require a longer recovery period. Some individuals may notice a lasting bump at the shoulder joint, which usually does not interfere with function or long-term comfort.

Understanding AC Separation

What a shoulder separation means and how it’s managed

A fall onto the shoulder, a collision during sports, or a sudden impact can sometimes lead to an injury known as an AC separation, or shoulder separation. While the name can sound alarming, many AC separations respond well to conservative care and a gradual return to activity when managed appropriately.

At Trenton Integrative Health Centre, we regularly see patients who are unsure whether their shoulder injury is something that will “just settle” or if it needs further attention. Understanding what’s involved can help you make informed, confident decisions about your recovery.

What Is an AC Separation?

An AC separation occurs when the ligaments that stabilize the acromioclavicular joint are injured. This joint connects the collarbone to the shoulder blade and plays an important role in shoulder movement and stability.

AC separations are commonly caused by a direct blow to the shoulder, such as a fall or contact during sports like hockey or football. The injury is classified into grades based on the extent of ligament damage, ranging from mild stretching to complete ligament disruption.

Common Symptoms

Symptoms can vary based on the severity of the injury but often include:

• Pain at the top of the shoulder
• Swelling or tenderness over the joint
• Difficulty lifting or moving the arm
• Pain with overhead or cross-body movements
• A visible bump on the shoulder in some cases

Not all shoulder separations look dramatic right away, and symptoms may become more noticeable as swelling develops.

How AC Separations Are Typically Managed

Most AC separations are managed without surgery, especially in the early stages. Initial care often focuses on protecting the joint, reducing pain and swelling, and allowing the ligaments time to heal.

Management may include:

• Temporary rest from aggravating activities
• Activity modification, especially limiting overhead or cross-body movements
• Use of ice to help manage pain and swelling
• Short-term use of a sling if needed for comfort
• Gradual return to movement with guided exercises and supportive therapies

Milder injuries often improve within one to two weeks, while higher-grade separations may take longer to recover fully.

What to Expect During Recovery

As healing progresses, discomfort typically decreases, and shoulder movement becomes easier. Some patients may notice a small, permanent bump at the top of the shoulder due to changes in joint alignment. In most cases, this does not affect shoulder strength, function, or long-term comfort.

Recovery timelines vary, and returning to sport or physically demanding work is best guided by symptom improvement and functional ability rather than a fixed timeline.

How TIHC Supports Shoulder Injury Recovery

At Trenton Integrative Health Centre, care begins with understanding how your shoulder injury affects your daily life, work, and activities. Treatment plans are tailored to your specific injury, goals, and comfort level and may involve one or more members of our collaborative care team.

Our team works together using evidence-informed, non-invasive approaches whenever appropriate, helping support recovery and guide you back to the activities you enjoy with confidence.

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