Thanks for the query.
This could be related to a skin disease called Vitiligo. It is easily diagnosed by a dermatologist and if needed a blue light (Wood's lamp) examination is used to understand it better. Kindly consult a skin specialist. Other skin conditions and close mimickers can rarely confuse a diagnosis of Vitiligo.
Next Steps
P alba should be ruled out
Health Tips
Your dermatologist will decide a treatment plan for you after a consultation.