Hormonal level fluctuations are known to cause skin pigmentation changes in females.
Usually, hyperpigmentation will gradually lessen over time and normal skin colour will return. However, this willrequire time, about 6-12 months or longer.
You shoulduse a good broad spectrum sunscreen daily to reduce further discoloration.
A variety of skin lightening agents are available to lighten/bleach hyperpigmented lesions. Usually combinations of the treatments below are usually required for significant improvement.
Corticosteroid creams, Glycolic acid peels
Chemical peels, laser treatments may be helpful but may aggravate pigmentation in some cases.