Understanding Shoulder Pain

Most mobile joint in the body - prone to injury

4.5MDoctor visits annually for shoulder pain
Understanding the Joint

Shoulder Anatomy

Shoulder anatomy illustration

The shoulder is a ball-and-socket joint with the greatest range of motion of any joint. This mobility comes at the cost of stability.

Key Structures

  • Rotator cuff (4 muscles/tendons)
  • Labrum (cartilage ring)
  • Bursa (fluid-filled sacs)
  • AC joint (collarbone to shoulder blade)
  • Biceps tendon
Common Causes

Shoulder Pain Conditions

Rotator Cuff Tear

2M+ Americans/year

Tear in muscles/tendons that stabilize the shoulder. Can be acute or degenerative.

Symptoms

  • Pain at night lying on shoulder
  • Weakness when lifting or rotating arm
  • Crackling sensation
  • Difficulty reaching behind back

Frozen Shoulder

2-5% of population

Adhesive capsulitis causes progressive stiffening. Often occurs after immobilization.

Symptoms

  • Progressive stiffness over months
  • Constant dull ache
  • Inability to reach behind back
  • Limited movement in all directions

Impingement Syndrome

Very common

Rotator cuff tendons get compressed during arm movements especially overhead.

Symptoms

  • Pain with overhead activities
  • Weakness in arm
  • Night pain
  • Pain reaching behind back

Shoulder Arthritis

Common over 50

Cartilage loss in glenohumeral or AC joint.

Symptoms

  • Deep aching pain
  • Grinding sensation
  • Limited motion
  • Pain worsens with activity

Shoulder Dislocation

Common in young athletes

Ball of humerus comes out of socket usually forward from trauma.

Symptoms

  • Severe pain
  • Visible deformity
  • Inability to move arm
  • Numbness down arm
Physical Therapy

Recommended Exercises

Consult a healthcare provider before starting any exercise program.

Pendulum Swings

2 min each directionGentle mobility

Lean forward supporting yourself on table. Let affected arm hang. Gently swing in small circles.

External Rotation

3 sets of 15Rotator cuff

Hold elbow at side bent 90 degrees. Rotate forearm outward keeping elbow at side.

Wall Slides

3 sets of 10Scapular stability

Stand with back against wall, arms at 90 degrees. Slide arms up wall keeping contact.

Doorway Stretch

Hold 30 sec x 3Chest and anterior shoulder

Stand in doorway with arms on frame at 90 degrees. Step through until you feel stretch.

Red Flags

When to See a Doctor

  • ! Sudden severe pain from injury
  • ! Visible shoulder deformity
  • ! Unable to use arm at all
  • ! Significant weakness that does not improve
  • ! Pain lasting more than 2 weeks
  • ! Signs of infection
Find a Specialist

Not Sure What's Causing Your Pain?

Take our AI-powered assessment for personalized insights.

Start Assessment