What causes oiliness and enlarge pores?
There are several factors that contribute to oily skin and enlarged pores. Genetics and hot, humid climates may determine oil production and pore size, while some medications and cosmetic ingredients can irritate oily skin.

Also, stress can trigger hormones, leading to over production of sebum or skin oil. When excess oil mixes with dead skin cells, it can lead to skin blemishes. However, if your skin has consistent breakouts, you may have problem prone skin and should seek advice.