Thanks for your query.
You mentioned that they are white and you do not have any problem with them.
If the spots are not raised above the skin level there Is a possibility of them being vitiligo
It is a autoimmune condition related to skin.
You kindly visit a dermatologist
and get It examined without hesitation.
Hope I have answered your query.
I will be available for your follow up queries If any.
Wishing you good health.