I get them, but not nearly as bad as some of the others here do. Mine usually start as sinus headaches that blossom into a migrane. Once they become migranes, though, they can last 4-5 days. I react badly to most of the prescription migrane meds, so I usually take Excedrin migrane and an extra dose of caffiene...and try to time them so the bounce-back happens at a time when I can be at home and nonfunctional.