Tendonitis, also known as tendinitis, is a common orthopedic condition characterized by inflammation of a tendon, the fibrous tissue that connects muscles to bones. It often results from repetitive overuse, sudden injuries, or age-related degeneration. In orthopaedics, tendonitis frequently affects tendons around joints, such as the shoulder, elbow, knee, or Achilles tendon. Orthopedic assessments for tendonitis involve clinical examinations, imaging studies like ultrasound or MRI, and evaluation of symptoms like pain, swelling, or reduced range of motion. Treatment may include rest, ice, anti-inflammatory medications, physical therapy, and in some cases, corticosteroid injections. Rehabilitation strategies in orthopaedics focus on addressing the underlying causes of tendonitis and restoring optimal tendon function. Strengthening exercises, biomechanical corrections, and gradual return to activities play a crucial role in preventing recurrence. Understanding tendonitis is fundamental in orthopaedics as it enables healthcare professionals to tailor interventions to the specific needs of each patient, promoting effective management, and preventing long-term complications associated with tendon injuries.