Pigmentation in Groin -- VI peels and lightening cream
I suggest a formal consultation with a cosmetic dermatolgist who specializes in peels, lasers and skin care. There is no cure for this but you can get improvement. Best, Dr. Emer.
Pigmentation and the Skin
It sounds like from the information that you provided that you would most benefit from just starting topical therapy to help these dark areas. Please consult a specialist in chemical peels for the best advice.