The rotator cuff is a group of tendons in the shoulder joint providing support and enabling a wide range of motion. Major injury to these tendons may result in tear of these tendons, a condition called rotator cuff tear. It is one of the most common causes of shoulder pain in middle aged adults and older individuals.

Rotator cuff tear results from pressure on the rotator cuff from part of the shoulder blade (scapula) as the arm is lifted. It may occur with repeated use of arm for overhead activities, while playing sports or during motor accidents.

The term arthritis literally means inflammation of a joint but is generally used to describe any condition in which there is damage to the cartilage. Damage of the cartilage in the shoulder joint causes shoulder arthritis. Inflammation is the body's natural response to injury. The warning signs that inflammation presents are redness, swelling, heat and pain.

The cartilage is a padding that absorbs stress. The proportion of cartilage damage and synovial inflammation varies with the type and stage of arthritis. Usually the pain early on is due to inflammation. In the later stages, when the cartilage is worn away, most of the pain comes from the mechanical friction of raw bones rubbing on each other.

Bicipital tendonitis is the inflammation of the biceps tendon, the tissue that connects the biceps muscle in your upper arm to the bones in the shoulder joint, allowing you to bend and rotate your arm. The condition causes pain in the upper arm and shoulder. It is more common in men in the age group of 40 to 60 years and occurs due to overuse of the arm and shoulder during many sports activities like tennis, baseball, weightlifting and kayaking where overhead movement is involved. It may also be associated with rotator cuff tears, arthritis or injury.

Playing more overhead sports and repeated use of the shoulder at the workplace may lead to sliding of the upper arm bone, the ball portion, from the glenoid–the socket portion of the shoulder. The dislocation might be a partial dislocation (subluxation) or a complete dislocation causing pain and shoulder joint instability. Shoulder joint often dislocates in the forward direction (anterior instability) and it may also dislocate in the backward or downward direction.

Most common symptoms of shoulder dislocation are pain and shoulder joint instability. Other symptoms such as swelling, numbness and bruising may occur. At times, it may cause tear in the ligaments or tendons of the shoulder and nerve damage.

Frozen shoulder, also called adhesive capsulitis, is a condition characterized by pain and loss of motion in the shoulder joint. It is more common in older adults aged between 40 and 60 years and is more common in women than men.

Frozen shoulder is caused by inflammation of the ligaments holding the shoulder bones to each other. The shoulder capsule becomes thick, tight, and the stiff bands of tissue called adhesions may develop. Individuals with shoulder injury, shoulder surgeries, shoulder immobilized for longer period, other disease conditions such as diabetes, hypothyroidism, hyperthyroidism, Parkinson’s disease and cardiac diseases are at risk of developing frozen shoulder.

The shoulder joint is a ball and socket joint. A 'ball' at the top of the upper arm bone (the humerus) fits neatly into a 'socket', called the glenoid, which is part of the shoulder blade (scapula). The term SLAP (superior –labrum anterior-posterior) lesion or SLAP tear refers to an injury of the superior labrum of the shoulder. The labrum is a ring of fibrous cartilage surrounding the glenoid for stabilization of the shoulder joint. The biceps tendon attaches inside the shoulder joint at the superior labrum of the shoulder joint. The biceps tendon is a long cord-like structure which attaches the biceps muscle to the shoulder and helps to stabilize the joint.

Shoulder Instability

Shoulder instability is a chronic condition that causes frequent dislocations of the shoulder joint.

A dislocation occurs when the end of the humerus (the ball portion) partially or completely dislocates from the glenoid (the socket portion) of the shoulder. A partial dislocation is referred to as a subluxation whereas a complete separation is referred to as a dislocation.

AC (acromioclavicular) joint sprains and dislocations are common shoulder injuries resulting from sudden impact or trauma. A sprain involves stretching or tearing of the ligaments supporting the AC joint, leading to pain, swelling, and limited shoulder motion. Dislocations occur when the collarbone separates from the shoulder blade, causing intense pain, visible deformity, and instability. Treatment includes rest, ice, compression, and elevation for sprains, while severe dislocations may require surgical intervention. Early diagnosis and proper treatment are essential for optimal recovery and preventing long-term shoulder complications.

The shoulder joint is a “ball and socket” joint that enables smooth gliding and thereby the movements of arms. However, it is inherently unstable because of the shallow socket. A soft rim of cartilage, the labrum, lines the socket and deepens it so that it accommodates the head of the upper arm bone better.

Traumatic injury to the shoulder or overuse of shoulder (throwing, weightlifting) may cause labral tear. In addition, ageing may weaken the labrum leading to injury

The shoulder is a shallow ball and socket joint, formed by the bone of the upper arm (humerus), which articulates with the shoulder blade in a cavity called the glenoid fossa.

The joint relies a great deal on surrounding soft-tissue structures such as tendons, ligaments and muscles (rotator cuff muscles) to maintain smooth motion and stability. The glenoid cavity is surrounded by a raised ridge of cartilage called the labrum that deepens the cavity and a ligamentous structure called the shoulder capsule centers the humerus in the cavity. The biceps muscle, certain back muscles as well as a group of muscles called the rotator cuff all work together to stabilize the shoulder.