Good afternoon, When I was originally discharged I was rated for a traumatic brain injury that caused chronic daily migraines. Before I was discharged they did a sleep study and found me to be "borderline" but said I did not have apnea. Now here we are 14+ years later and the VA has since done another sleep study where they determined that I do, in fact, have apnea and they have issued me a CPAP machine. They think that the breathing difficulty is making my migraines worse. Is this something that I should file for an increase in my rating? Has anyone increased their rating and can help me determine if this is worth the effort?