Migraine Journal Any Experience With Childhood Migraines?

Any experience with childhood migraines? - migraine journal

My 13-year-old son has chronic migraines for 7 years. We have everything from diet books and tried testing, food allergies, eye examination, MRI, various medications, medical massage to remove ... whatever. In fact, nothing seems to work, or to identify the cause of headaches. Has anyone similar experiences or suggestions on what could be the cause?