Got contraceptive implant a month ago. dark hair growth - moustache - getting implant removed in a week. will this go away?

Melasma: Experts believe that the dark patches in melasma could be triggered by several factors, including pregnancy, birth control pills, hormone replacement therapy (hrt and progesterone), family history of melasma, race, antiseizure medications, and other medications that make the skin more prone to pigmentation after exposure to ultraviolet (uv) light. Uncontrolled sunlight exposure is considered cause.