Shoulder Impingement

The shoulder is the body’s most mobile joint, allowing a wide range of motion for lifting, reaching, throwing, and other activities. Because it relies on a delicate balance of bones, tendons, and muscles to function smoothly, the shoulder is particularly susceptible to repetitive wear, irritation, and inflammation.

The shoulder joint relies on the rotator cuff tendons and the subacromial bursa to glide smoothly beneath the acromion (the outer edge of the shoulder blade). When these soft tissues become compressed or irritated during arm movement, it can lead to pain and restricted mobility. At Fox Valley Orthopedics, we provide personalized treatment plans designed to resolve shoulder impingement and restore long-term function.

What is Shoulder Impingement?

Shoulder impingement occurs when the tendons of the rotator cuff or the bursa become repeatedly pinched or compressed against the top bone of the shoulder joint (acromion) during overhead motion.

Impingement may result in:

• Inflammation of the rotator cuff tendons (tendonitis)

• Swelling of the subacromial bursa (bursitis)

• Friction and irritation during overhead arm movement

• A aching sensation or localized sharp pain in the upper arm or shoulder

Over time, repeated impingement episodes may lead to chronic tendon degradation or partial and full-thickness rotator cuff tears.

What Types of Shoulder Impingement Are There?

Several forms of impingement can affect the shoulder joint.

Subacromial Impingement (External Impingement)

This most common type occurs on the outside of the joint when the rotator cuff tendons rub against the underside of the acromion during arm elevation.

Internal Impingement

Often seen in overhead athletes, this type occurs when the rotator cuff tendons get pinched against the back side of the joint socket (glenoid) during high-velocity throwing or reaching.

Secondary Impingement

This form develops due to subtle muscle weakness, joint laxity, or poor shoulder blade mechanics, causing the arm bone to shift abnormally and compress nearby soft tissues.

Bony Impingement (Subacromial Spurs)

This occurs when bone spurs form on the underside of the acromion, narrowing the space available for the tendons and bursa to glide smoothly.

What Causes Shoulder Impingement?

Shoulder impingement typically develops when the space beneath the acromion narrows or when the soft tissues within the joint become swollen.

Common causes include:

• Repetitive overhead activities

• Throwing sports

• Heavy lifting or construction work

• Bone spurs on the acromion

• Rotator cuff muscle weakness or imbalance

• Poor posture and scapular dyskinesis

• Bursitis or tendonitis

• Age-related wear and tear

• Prior shoulder trauma

Athletes who participate in swimming, baseball, tennis, volleyball, weightlifting, and other overhead activities may be at increased risk.

What are the Symptoms of Shoulder Impingement?

Symptoms vary depending on the severity of inflammation and the specific structures involved.

Common signs and symptoms include:

• Shoulder pain

• Pain when lifting the arm overhead or reaching behind the back

• Localized aching in the front or outer side of the shoulder

• Weakness

• Difficulty lifting objects

• Clicking or catching sensations during motion

• Limited range of motion

• Nighttime pain or trouble sleeping on the affected side

• Reduced athletic performance

• Shoulder fatigue during activity

Many patients describe a persistent dull ache that turns into sharp pain when reaching above shoulder height.

How is Shoulder Impingement Diagnosed?

Diagnosing shoulder impingement begins with a comprehensive orthopedic evaluation.

Diagnostic evaluation may include:

• Review of symptoms and medical history

• Physical examination

• Impingement clinical tests (such as Neer and Hawkins-Kennedy tests)

• Assessment of strength and range of motion

• Evaluation of posture and shoulder blade mechanics

• X-rays

• Ultrasound imaging

• MRI imaging

• Diagnostic local anesthetic injections

Imaging studies help identify bone spurs, structural narrowing, bursa inflammation, and potential rotator cuff tears.

How is Shoulder Impingement Treated?

Treatment focuses on reducing inflammation, restoring clear movement space, and preventing future tendon damage.

What Nonsurgical Treatments Are Available for Shoulder Impingement?

Many patients can improve without surgery.

Nonsurgical treatment options may include:

• Activity modification

• Physical therapy

• Rotator cuff strengthening

• Scapular stabilization exercises

• Anti-inflammatory medications

• Corticosteroid injections

• Ice therapy and rest

• Home exercise programs

• Postural correction routines

Therapy focuses on strengthening the rotator cuff muscles and scapular stabilizers to pull the arm bone down and keep it from pinching under the acromion.

When Is Surgery Recommended for Shoulder Impingement?

Surgery may be recommended when:

• Persistent pain limits daily activities, sports, or work

• Conservative treatment fails after several months

• Significant bone spurs or structural narrowing are present

• Associated partial or full-thickness rotator cuff tears require repair

Surgical options may include:

• Subacromial decompression (acromioplasty)

• Arthroscopic bursectomy

• Rotator cuff repair

• Biceps tenodesis or tenotomy in severe cases

The appropriate procedure depends on the specific cause and severity of the impingement.

What Does Shoulder Impingement Recovery Look Like?

Recovery depends on the severity of the condition and the treatment selected.

Many patients successfully improve through rehabilitation and strengthening programs.

Following surgery, recovery often includes:

• Temporary sling use

• Early passive range-of-motion exercises

• Physical therapy

• Progressive muscle strengthening

• Sport- or work-specific rehabilitation

• Gradual return to full overhead activity

A structured rehabilitation program is critical for restoring strength and reducing the risk of recurring inflammation.

What Complications Can Occur if Shoulder Impingement Is Left Untreated?

Without treatment, shoulder impingement may continue to worsen over time.

Potential complications include:

• Chronic shoulder pain

• Rotator cuff tears

• Chronic bursitis

• Muscle weakness and atrophy

• Frozen shoulder (adhesive capsulitis)

• Reduced range of motion

• Loss of athletic performance

• Decreased quality of life

Early treatment can help preserve shoulder function and prevent long-term joint damage.

Get Expert Shoulder Impingement Care at Fox Valley Orthopedics

Shoulder impingement can make it difficult to work, compete in sports, exercise, and perform everyday activities with confidence. At Fox Valley Orthopedics, our experienced specialists provide comprehensive care for shoulder impingement, including advanced diagnostics, targeted physical therapy, and minimally invasive arthroscopic procedures when necessary.

Whether your treatment involves physical therapy, strengthening exercises, anti-inflammatory options, or arthroscopic subacromial decompression, our team is committed to helping you regain comfort, mobility, and strength. If you’re experiencing symptoms of shoulder impingement or pain with overhead movement, schedule an appointment with Fox Valley Orthopedics today by calling (855) 386-7846 to discuss your treatment options and take the first step toward lasting recovery.