A migraine can show up on a mri I believe it shows as a lesion.

But even with epilepsy there are lesions that aren't tumors, so I don't
know that its something to worry about either way till you see the doctor.

My son has had many MRI's and he has lesions, but they are part of
his epilepsy that he has had since he was 7 he is now 15.

My other son has migraines and has a lesion, or place that shows on the
mri, that they feel just shows he has migraines.

Donna