I suffered a bang to the head around 18 months ago and have since suffered from severe migraines and have now been diagnosed with hemiplegic migraine, as i suffer from a lot of additional symptoms as well as the headache. I am now trying to find out whether the 2 could be related and whether the bang to the head could have possibly caused my hemiplegic migraine, as I never suffered from this prior to the injury. Any help on answering this would be fantastic. Thanks.