Shoulder Pain

Common Injuries

Rotator Cuff Tear

Tearing of one or more rotator cuff muscles or their respective tendons (figure 1), typically following a lifting, pushing or pulling activity or a sudden movement (often with the arm in elevation or overhead). Associated with pain in the shoulder that may radiate into the upper arm and sometimes pain on firmly touching the affected rotator cuff muscle or tendon (figure 1). Pain may also increase during lifting activities (especially with the arm outstretched or above the head) and when lying on the affected side.

Referred Pain

Pain referred into the shoulder from another source such as the neck or upper back, frequently associated with symptoms above or below the shoulder (such as the neck, upper back, arm, elbow, forearm, wrist or fingers). Typically associated with pain on firmly touching the region responsible for the referred pain and / or loss of movement in that region. Sometimes in association with pins and needles or numbness in the affected arm or hand.

Dislocated Shoulder

Tearing of connective tissue surrounding the shoulder joint (figure 2) with subsequent displacement and separation of the bones forming the joint so they are no longer situated next to each other (i.e. the upper arm bone comes out of the socket). Typically occurs as a result of a fall onto an outstretched hand or a direct impact from an object or person and causes severe pain in the shoulder that may radiate down the arm, a feeling of the shoulder 'popping out', deformity of the shoulder joint, muscle spasm and sometimes pins and needles or numbness.

Figure 2 – Anatomy of a Dislocated Shoulder

Labral Tear of the Shoulder

Damage to the cartilage lining the shoulder joint (labrum - figure 3) often in association with a dislocated shoulder, or due to a fall onto the arm, heavy lifting, a pushing or pulling movement or a forceful throw. Pain is usually deep, although may present as vague shoulder pain. A clicking or catching sensation is often present during certain movements. Symptoms may increase with certain, often very specific movements or activities using the shoulder such as arm elevation and lifting (especially overhead), weight bearing through the affected arm (e.g. push ups) or sometimes lying on the affected side.

Figure 3 - Relevant Anatomy for a Labral Tear of the Shoulder

AC Joint Sprain

Tearing of the connective tissue and ligaments of the Acromio-Clavicular joint (AC Joint - figures 4 & 5) typically as a result of a direct impact to the point of the shoulder during a fall or collision. Causes pain at the top of the shoulder that may increase when lying on the affected side, moving the arm across the body and during other shoulder movements. There is also localised tenderness on firmly touching the AC joint (figures 4 & 5).

Figure 4 - Anatomy of an AC Joint Sprain

Figure 5 - AC Joint Anatomy

Clavicle Fracture

A break in the collar bone of the shoulder (Clavicle – figure 6) usually due to a fall onto the point of the shoulder of a forceful direct impact to the clavicle. Associated with severe shoulder pain, swelling, tenderness on firmly touching the affected region of the bone and sometimes bony deformity.

Figure 6 – Anatomy for a Clavicle Fracture

Less Common Injuries

Biceps Rupture

Complete tearing of one or more tendons or muscle bellies of the biceps muscle (figure 7) typically due to heavy lifting (particularly overhead). Associated with pain in the front of the shoulder, upper arm or elbow and often a snapping or tearing sensation at the time of injury. Obvious deformity of the biceps muscle is usually noted when compared to the non injured side especially when contacting the bicep muscle.

Figure 7 – Anatomy of a Biceps Rupture

Pectoral Strain

Tearing of one or more pectoral muscles (figure 8), typically during a forceful pushing activity (such as performing a bench press). Associated with pain in the front of the shoulder or chest and often pain on firmly touching the affected muscle. Pain may also increase during pushing activities and when performing a pectoral stretch (figure 9).

Figure 8 - Anatomy of a Pectoral Strain

Figure 9 – Pectoral Stretch (right side)

Scapula Fracture

A break in the shoulder blade bone (Scapula – figure 2) usually due to a fall onto the shoulder blade or a forceful direct impact from an object or person. Associated with severe pain in the shoulder blade region, swelling, tenderness on firmly touching the affected region of the bone, markedly reduced shoulder function and sometimes bony deformity.

Humeral Fracture

A break in the upper arm bone (Humerus – figure 2) usually due to a fall onto an outstretched arm, the shoulder itself, or, a forceful direct impact from an object or person. Associated with severe pain in the shoulder, upper arm or elbow, swelling, tenderness on firmly touching the affected region of the bone, markedly reduced shoulder and upper limb function and sometimes bony deformity.