Hi. Greetings. Don't sweat too much about this darkening. This could be due to hormonal changes. This could be partly reversible and treated. Are you over weight?. Please meet a dermatologist in person and get yourself assessed. For all you know some of it could be resolved with treatment by the time you get married . warm regards.

It may be a natural darkening of body folds with age or a condition called acanthosis nigricans where the skin becomes thick. I'm case of AN, we have to check if you have other associated problems like PCOD. PCOD is associated with weight gain and other changes due to hormonal imbalance. You could visit a dermatologist and start using simple depigmenting creams in case of natural darkening. If you have other symptoms like irregular (menstrual) periods, weight gain, increased facial hair or pimples you will need a hormonal evaluation. It will require a different kind of treatment in addition to the depigmenting creams. Warm regards. Dr. Rajdeep Mysore. Chirag Hospital Bangalore