Knee pain is a common condition characterized by discomfort or pain in or around the knee joint. It can result from various causes, such as injuries, overuse, or underlying health conditions like arthritis. Common conditions include osteoarthritis, ligament injuries (like ACL or MCL tears), meniscus tears, bursitis, and tendonitis. Symptoms may include swelling, stiffness, tenderness, difficulty bending or straightening the knee, and a feeling of instability. Knee pain can affect daily activities, from walking to climbing stairs. Early diagnosis and treatment, including physiotherapy, can help manage the pain and restore mobility effectively.