Oily skin needs special cleansing with plenty of hot water and soap to prevent the pores from being clogged. Avoid harsh products that strip your skin of oil and encourage flakiness. They can cause a reaction known as reactive seborrhoea, where the oil glands work overtime to compensate for the loss of natural oils. Avoid skincare products that leave your skin feeling taut and dehydrated. They cause the upper layers of the skin to shrink. This restricts oil flow through the pores leading to blockages and breakouts.