I have had migraines since I was 15. It starts with the aura.. the vision is blurry and partially blind for 20-30 minutes with the wavy lines. Then the headache kicks in . I used to get nausea and would vomit during some of them.I’ve been to neurologists and drs and have found some medication that helps kill the pain after several hours. As I’ve gotten older, they’ve lessened in intensity. You outgrow them slowly as you get into your 50’s. I’ve found for me the trigger is strong HP building in . Another words high barometric pressure. It does something to the blood vessels in the brain which triggers it for me. In fact, I just had one this past week with that big ,cold high on Tuesday. There’s not a worse feeling in the world than when that aura hits. You know you’re done.