It's a natural part of aging, and although hydroquinine or other dangerous lightening products might be tempting, resist the urge. Instead, use a spot brightening serum like DDF's convenient little Discoloration Reversal-PODs ($72), moisturizer, a wide-spectrum sunblock, and your favorite foundation. You'll get similar results without harming your health.
Hyperpigmentation is the darkening of patches of skin or nails due to ramped-up melanin production, resulting in blotchy looking skin, "raccoon" under-eye circles, and uneven skin tone. Although hyperpigmentation is common across the board, it's especially prevalent in women of South Asian, East Asian, Mediterranean, or African heritage — so almost everyone.