Oily skin has a naturally higher sebum or oil content. Produced by the sebaceous glands and secreted on to the skin surface via follicles, sebum helps form part of the skins natural barrier known as the acid mantle. Excess oil can be problematic and can lead to spots, surface shine or difficulty with make-up staying on the skin. There are a number of products such as Salicylic, Lactic and Glycolic Acid that can help regulate sebum production. However, it is important never never trip the excess oil away from the skin.