my daughter was very fair at birth and 2 days after that, then she developed icterus so we exposed her to sun, around 9 am everyday n one day around 11 am, now she looks quite darker. so can sun exposure be the reason of the tone or may be its naturally her skin tone? though her fingers n hands are fairer compared to her face. if sun exposure is the reason for darken skin tone is it reversible? n any measures to be taken for the same?