When asked, “What does physical therapy (PT) help with?” most people will answer, “Well, it helps with pain, of course!”. Most people seek out PT care because of some kind of pain, whether it’s healing from an injury or surgery, or learning tools to manage a nagging pain that’s been present for years. But what is pain? What causes it? Why does it sometimes go away, and why does it sometimes linger over months or even years?