Knee osteoarthritis is a common joint condition that occurs when the cartilage in the knee wears down over time. This degeneration can lead to pain, stiffness, and swelling, making it difficult for individuals to perform everyday activities. Factors such as age, obesity, and previous injuries can increase the risk of developing this condition. Symptoms of knee osteoarthritis often worsen with activity and improve with rest. While there is no cure, treatments such as physical therapy, medications, and lifestyle changes can help manage symptoms and improve quality of life. In severe cases, surgical options like knee replacement may be considered.