The skin secretes natural oils to keep itself moisturized, but for people with oily skin, this process can go into overdrive, especially if they have larger pores.
This can translate to an oily film on your face throughout the day, as well as frequent breakouts. If you have oily skin, you should avoid using thick creams and moisturisers. However, that doesn’t mean you should skip hydration altogether. Oily skin can still be dry, because oil and water are two different things.