But while they last, they can fundamentally change how a person experiences daily life. That may help explain why some treatment-related changes feel so unsettling. But understanding what life was like before the symptoms, and what daily life could look like without them, is just as important. So when treatment changes these patterns, the result can feel confusing because the person is not only experiencing fewer symptoms. A life without certain symptoms may feel unfamiliar at first, especially when those symptoms have been present for years.