Muscle Strain or Sprain
Muscle strain in the shoulder often occurs due to overexertion or improper use of the muscles. Activities such as lifting heavy objects, repetitive motions, or sudden movements can lead to strain. The pain is typically localised to the affected muscle or muscle group and may worsen with movement.
Rotator Cuff Injury
The rotator cuff is comprised of four muscles and their tendons that stabilize the shoulder joint and facilitate arm movement. Injuries to the rotator cuff can result from acute trauma, such as a fall or lifting a heavy object, or from chronic wear and tear over time. Symptoms may include pain, weakness, and limited range of motion, especially when reaching overhead or behind the back.
Tendinitis
Tendonitis refers to inflammation of the tendons in the shoulder, often caused by repetitive overhead movements, sports activities, or sudden injury. Common types of shoulder tendonitis include biceps tendonitis and supraspinatus tendonitis. Symptoms include pain, swelling, and tenderness in the affected area, which may worsen with movement.
Bursitis
Bursitis occurs when the bursae, small fluid-filled sacs that cushion the bones, tendons, and muscles around joints, become inflamed. In the shoulder, subacromial bursitis is a common type of bursitis, often resulting from repetitive overhead activities or direct trauma. Symptoms include pain, swelling, and tenderness in the shoulder area, particularly when raising the arm or lying on the affected side.
Arthritis
Arthritis refers to inflammation of the joints and can affect the shoulder joint as well. Osteoarthritis, typically associated with aging and wear and tear on the joint cartilage, can cause pain, stiffness, and decreased range of motion in the shoulder. Rheumatoid arthritis, an autoimmune condition, can also affect the shoulder joint, leading to inflammation, pain, and eventual joint damage.
Frozen Shoulder (adhesive capsulitis)
Frozen shoulder is characterized by stiffness, pain, and limited range of motion in the shoulder joint. The exact cause is not fully understood, but it often develops gradually and can be associated with conditions such as diabetes, thyroid disorders, or previous shoulder injury or surgery. The shoulder capsule becomes thickened and tight, restricting movement and causing pain, particularly during activities that require overhead motion.
