I've been suffering from aura migraines for a few years now. I think they started around the same time as I developed an overactive thyroid although going through puberty, I had a few really severe migraines. The aura migraines of recent years have the visual disturbance but rarely followed up with a headache or nausea. However, I've had about 3 in the last few weeks and have noticed they have all occurred about an hour after I have finished a run. I have been well hydrated beforehand so it's not that. Has anyone else experienced something similar?