Whitening of hairs may be normal in your case. I do not know your age. If you are young it may be genetic in origin. You may try to prevent further whitening of hairs. Blood tests may be done to rule out thyroid
,vitamin B 12 deficiency and other diseases. Take anti oxidants , vitamin E
, calcium pentothenate and GABA. Have blood tests to rule out internal disease. Do not apply dye to blacken the hairs,as it is toxic chemical and cause irritant dermatitis
. So, avoid to dye the hair.
I hope you got my answer.
Dr. Ilyas Patel MD