runs in families its a genetically related problem , bt nothing to worry ,even my family has migraine.just try to avoid the circumstances that precipitate the attacks of headache ,like have proper sleep, dont get exposed to hot weather etc . Keep a painkiller tablet (Diclomol
),and an anta acid (Omez
D) always with u .that will Do .Dont forget to get ur eyes tested for any refractive error
& if ur advised an spectacles , Do use it regularly.Allah is great may he give ur sis shifa.