Why does one get migrane? what are its causes ?

Susceptibility: Migraine is a disorder of heightened sensitivity to inner and outer triggers which cause sensitized glutamine receptors to over-react triggering a chemical/electrical cascade. This seems to be in general a familial acquired and genetically influenced disorder, but head trauma, several medications and food senstivities can all trigger migraine events. Hormonal issues, menstrual migraines exist.

Genetics: Migraine is one of the most common inherited disorders. There is often a strong family tendency. Many other factors contribute to how it presents and how difficult to manage. Most important is acceptance of the disorder and a good management plan.