I hate having migraines.
Some people with migraine have first indicators such as dizziness, numbness and flashing lights.
Around the time of the initial symptoms, other symptoms follow such as sensitivity to light, noise and smell, thumping or throbbing headache, pain in the sinuses or neck,dehydration, thirst or pain on one side (may swap sides). It's not the case that all symptoms have to be present.
Different triggers can cause a migraine in migraine sufferers. For instance......