Shoulder arthritis refers to the inflammation and degeneration of the shoulder joint, leading to pain, stiffness, and a decrease in the joint's range of motion. The shoulder is a ball-and-socket joint, and arthritis can affect either the ball (head of the humerus) or the socket (glenoid).

There are different types of arthritis that can affect the shoulder:

• Osteoarthritis: This is the most common type of arthritis and is typically associated with aging. It involves the gradual wearing away of the cartilage that covers the ends of bones in the joint. As the cartilage breaks down, bones may rub against each other, causing pain and stiffness.
• Rheumatoid Arthritis: Rheumatoid arthritis is an autoimmune disorder where the immune system attacks the lining of the joint, leading to inflammation and eventual joint damage. It can affect various joints, including the shoulder.
• Post-Traumatic Arthritis: This type of arthritis can develop after an injury to the shoulder, such as a fracture or dislocation. The injury can disrupt the normal functioning of the joint, contributing to the development of arthritis over time.
• Avascular Necrosis: This is a condition where the blood supply to the bone is disrupted, leading to bone death. Avascular necrosis can affect the shoulder joint and cause arthritis.

Symptoms of Shoulder Arthritis:

• Pain: Persistent pain in the shoulder joint, often worsened with movement.
• Swelling: Swelling and inflammation around the shoulder joint.
• Decreased Range of Motion:: Limited ability to raise the arm or perform overhead movements.
• Stiffness: Difficulty moving the shoulder, particularly in the morning or after periods of inactivity.