It's premature greying of hair (canities) which is mostly genetic or due to
vitamin deficiency and there's seborrheic dermatitis(dandruff).
It can be treated based on severety from mild to severe with proper prescription medications and good response is attained.
Next Steps
kindly consult/chat with me online or any dermatologist.
Health Tips
HAIR CARE for mild dandruff:
use Dove anti dandruff shampoo daily over wet scalp for 3-5 minutes and wash with plain water. dry your hair in sunlight after bath. Do not rub your hair while washing/drying hair.
Do not apply any oil immediately after taking bath.
consume healthy nutritious balanced diet including all vitamins(curd, milk, meat, fruits).