It is very unpleasant having a migraine..
Common symptoms are early symptoms for instance Visual disturbances, slurred or muddled speech and blind spots scotoma.
Once the initial symptoms clear, people also get sensitivity to light, noise and smell, cold sensation, inability to think clearly or perform normal activities,thumping or throbbing headache or loss of concentration. It's not the case that all symptoms have to be present.
A lot of different cues can cause a migraine in migraine sufferers. For instance......