Arthritis of the knee, a leading cause of disability, causes pain in the front of your knee and can make it difficult to kneel and climb stairs. It occurs when the cartilage wears down and becomes inflamed. When cartilage wears away, it becomes frayed, and when the wear is severe, the underlying bone may become exposed. Moving the bones along this rough surface is painful.
Symptoms: Pain, swelling, and stiffness are the primary symptoms of arthritis.
Treatment Options: Activity modification, physical therapy, injections, surgery.