Musculoskeletal disorders (MSDs) affect the muscles, ligaments, joints, nerves, and tendons, ranging from acute issues like sprains and strains to chronic conditions such as osteoarthritis. Key types of tendonitis include medial and lateral epicondylitis, Achilles tendonitis, and patellar tendonitis, with management strategies involving rest, medication, physical therapy, and potential surgical intervention. Osteoarthritis, primarily impacting older adults, leads to joint pain and stiffness, while rheumatoid arthritis is an autoimmune disorder presenting with inflammation and potential deformities, requiring comprehensive medical and surgical management.