Hello and welcome to healthcaremagic
Indian skin is type IV skin (Wheatish) which contains good amount of
melanin, therefore is prone to
tanning even on moderate sun exposure. Whereas, people in the west have type I or Type II skin which contains very less amount of melanin (White skin), therefore it does'nt tan on sun exposure, as much as Indian skin.
Skin type is genetically determined and therefore cannot be changed. However sun protection and skin lightening creams make a difference to the overall complexion by removing the excess tan and making the person fairer.
I would advice that you use a broad spectrum sunscreen, that which offers both UV B and UV A protection, throughout the day
UV A part of the electromagnetic spectrum is mainly responsible for tanning.
Therefore, a good sunscreen should have broad spectrum UV A coverage in addition to UV B coverage, in order to be able to prevent tanning and it needs to be applied in sufficient quantity and every 2-3 hourly.
If I was the treating doctor I would have also asked you to use a cream containing one or more of the skin lightening agents e.g
kojic acid,
glycolic acid, arbutin etc once daily at night to gradually fade away the tan.
Besides, you can also go for peeling sessions from a
dermatologist to enhance the skin (I would recommend either Glycolic or lactic acid peeling sessions for you).
regards