It is very unpleasant having a migraine..
Some people with migraine have initial indicators such as flashing lights, nausea or vomiting and diarrhoea.
Once the initial symptoms clear, other symptoms follow such as pins and needles, pain on one side (may swap sides), pain in the sinuses or neck,dehydration, thirst or sensitivity to light, noise and smell. It's not the case that all symptoms have to be present.
A lot of different cues will effect a migraine in migraine sufferers. For instance......