Exfoliation can do wonders to the skin, especially with all of the quality products on the markets these days. It can promote cell turnover, promote new collagen formation, decrease fine lines, unclog pores, and give your skin an overall smoother, healthier glow. However, over-exfoliation can lead to skin damage. The harsher the exfoliant, the more it can aggravate the skin, leading to an excess production of sebum, which clogs the pores. An excess amount of high cell turnover can cause skin lesions and make the skin lose its healthy skin cells and natural defenses. As a general rule of thumb, the softer the exfoliant, the more often you can use it. People with dry skin should exfoliate one or two times a week while people with oily skin can get away with exfoliating two or three times a week. Signs that you are over-exfoliating may be that you skin looks shiny, the texture is uneven, your pores look larger, you have an increased amount of acne, your skin is flaky or irritated, or your skin is dry. If you have any of these symptoms it is best to see a dermatologist who can give you the best advice on how to take care of your skin.