Knee pain is a common discomfort that can be triggered by several factors. It can be caused by an injury such as a torn ligament or cartilage, or by an underlying medical condition such as arthritis. Lifestyle factors such as overuse or poor posture can also contribute to knee pain. Treatment for knee pain depends on the underlying cause and may include rest, ice or heat therapy, physical therapy, medication, or in severe cases, surgery. It is recommended to seek medical attention if the knee pain is persistent or severe.