Notice that your skin emits a little extra shine? Fact is, everyone has oil in their skin. Under each of your pores is a sebaceous gland that produces natural oils called sebum. This helps keep your skin hydrated and healthy.

In some people, though, the sebaceous glands can produce too much oil. This creates oily skin.

You know you have oily skin if your skin constantly looks shiny, and you go through several blotting sheets a day. Oily skin can even feel greasy within hours of cleansing.

Breakouts are also more likely because the sebum mixes with dead skin cells and gets stuck in your pores.

The causes of oily skin include genetic, environmental, and lifestyle factors. While you can’t necessarily get rid of oily skin, you can take steps to make your skin less oily. The key is to identify one or more of these seven underlying causes.

1. Genetics
Oily skin tends to run in families. If one of your parents has oily skin, you’re likely to have overactive sebaceous glands, too.

2. Age
While you don’t necessarily grow out of oily skin, your skin will indeed produce less sebum as you age. Aging skin loses protein, such as collagen, and the sebaceous glands slow down.

This is why many people who have aging skin also have dry skin. This is also the time when fine lines and wrinkles are more noticeable because of the lack of collagen and sebum.

One benefit of oily skin is that you may not show signs of aging as quickly as your drier counterparts.

You may have oily skin now, but you’ll need to evaluate your skin as you get older. Even people in their 30s may not have the same skin composition as they did in their teens and 20s.