Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
The condition you are facing can be melasma
, PIH, etc.
Without actual visualization of the skin, it is not possible to comment on nature of pigmentation.
Sun protection is most important for any cosmetic treatment.
Use good quality sunscreen.
Avoid sun exposure.
Use brevoxyl face wash.
Apply depiwhite cream at night.
Take lot of vitamin C
Visit a dermatologist
for proper examination and diagnosis who can also provide you some clinic based procedure like chemical peeling and laser
Hope I have answered your query. Let me know if I can assist you further.