Oily skin can happen when the sebaceous glands in the skin make too much sebum. Sebum is the waxy, oily substance that protects and hydrates the skin which is a good thing and is vital for keeping the skin healthy. However, too much sebum can lead to oily skin, clogged pores, and acne. The happy news however is that oily skin makes you look younger and more supple because it has more natural moisture and is less prone to wrinkles. Daily exfoliation is essential to promote cell turnover and prevent sebum build up in pores. However, a common mistake is to remove all the oil from the skin, which only increases in more production of sebum. Oilier skin is also prone to PIH (post-inflammatory hyper-pigmentation), a condition which leaves dark spots on the skin after a breakout has healed. Exfoliation will also help lighten these dark spots by polishing away the uppermost layers of skin and revealing new cells.