Dark spots are the result of the overproduction of melanin (skin pigment). It can happen because of aging, UV light exposure.
It can be located on the forehead, face or cheek bone area. Once your pores become clogged, your skin is unable to breathe. The pH balance of the skin is disturbed and your skin is unable to absorb the required amount of moisture. This leads to the outbreak of acne, blackheads and pimples.
Skin brightening might help in reducing.