What Is The Treatment For The Premature Greying Of Hair?

i am a 27 year old female. initially, hairs on my anterior frontal region of right side of scalp getting white since last thre years.and now i have many white hairs spread over my entire scalp.i have migraine sice 5 years.i am not taking any medicines.my father also got his hairs white during this age but mother didnt hav her hairs white at such an early age.i apply heena over my hairs to hide them as i hav no other herbal option.but i also have small amount of dandruff.