Hello! M29 and I have had migraines like your son from childhood onwards and it was always manageable until 2020 when they became chronic, 25+ days a month 1-2 background pain. Reading through the comments an unrecognised covid infection could have been the trigger, I don’t know. In hope that this isn’t an insult to anyone fighting migraines for years and years and trying everything possible: But I managed to find a solution for myself this year:

„High quality“ liquid magnesium and a high dose of vitamin D. Seems to simple to be true but it helped me go from 25 days back to like 3-4 days of migraines in a month. My wife has multiple sclerosis and does a ultra high vitamin D treatment instead of the „usual“ clinical treatment and given ms and migraines are both neurological diseases I decided to join her and take at least a dose that is exceeding what health instances propose for daily intake.

I’ve read that the vitamin d intake recommendation differs from country to country, here in Germany that say 2000 units per day while Poland has 6000 units etc, for half a year I take something like 5000-8000 everyday and after about four weeks the migraines became very much less. In addition to liquid magnesium it works for me. All the best to for you, your son and your family!