Does white spots on an MRI indicate migraines if spinal tap is normal? Is this typical, or do you need to ask dr about other causes, medicines, etc?
White matter lesions can be from Migraine. For more information on this, please take a look at Is Migraine a Progressive Brain Disease?
That said, there are other possible causes of such lesions, so it's important that your doctor rule out those other causes, including multiple sclerosis.
I have had migraines for years and my MRI reveal multiple white matter lesions due to migraines. These will increase as mine have with repeat scans; as long as you have no other neurological symptoms and tap is normal- If your Dr agrees - migraines are probably the culprit