How does this cream containing hydroquinone, mometasone and tretinoin help with pigmentation?

Together, these three work from different angles - hydroquinone reduces pigment production, tretinoin speeds up skin renewal, and mometasone calms any irritation the other two might cause. It's an effective combination for stubborn pigmentation, but because of the steroid, it's meant for short, supervised courses rather than continuous daily use. Your dermatologist can tell you exactly how long to use it and when to taper off.