Nowadays, white hair is not only a symbol of age, but also more and more common. Men, women and children all have different degrees of white hair. Middle-aged gray hair, postpartum gray hair, hereditary gray hair, adolescent gray hair, stress gray hair, pathological gray hair, etc. Because you are gray at a young age and older than your peers, it not only affects people's appearance, but also brings a lot of troubles and psychological pressure.