MulberryTrees: Yes one should say in my head region not brain correct. I know what you mean my ones go up and down. MRI might show or not (50/50 even if you have them there) dep where they are, size, etc. Another Q here can one even ID a parasite on MRI? Many would fail on the first place.
Reg migraines yes systemic inflammation (chronic infection) can drive this. While only few parasites can pass your BBB the rest can and do invade other parts of your CNS and make a mess here so it lead to headaches as well.