The pain and discomfort caused by a painful joint, whether a knee, hip, ankle or shoulder, is very disabling. Regardless of its origin-injury, degenerative or inflammatory arthritis, the inability to perform normal function comfortably can affect your ability to live a normal life. When your joints hurt, it becomes a chore to move. "I think I will just sit down." But that isn't who you are. You want to enjoy your life. You want to be able to dance when you want or take your dog for walk.