In my personal experience... I say it's really hard to really tell and it really varies from person to person. I actually think my symptoms have gotten a bit worse, but it's hard to tell since i have bad weeks or entire set of months... sometimes it'd seem as if the pain was gone for good, but after a while comes back. One thing is for sure: I'm getting more headaches and migraines than ever and that's why I'll be going to see a neurologist soon (wish me luck guys, kinda nervous here!). So I really think it depends on how serious the condition is for the individual, the lifestyle, but most of all genetics...