you can also get them from past migraines.

after 10 years im still being sent for tests when something changes. this time its test for muscles enzymes, a new mri of my cervical spine and ssep (evoked potentials). this due to my new symptom of my legs basically locking up on me 2x and also the increasing symptom of my legs feeling very heavy when i walk any distance. first it was running that did that, then it was fast walking and now its walking regular pace that does it. nothing is expected to be found but a few things will be ruled out.