I probably have like the worst oily skin in the world. Here are some tips :)
- wash your face twice a day with an oil free cleanser. -using a light moisturizer makes your skin produce less oil. -before putting on make up (if you wear it) rinse your face with cold water, it will close your pores, witch is where the oil comes from. -theres this crazy thing (look it up on you tube) that using milk of magnesia (witch is like a liquid laxative) as foundation can totally stop any kind of oil from being produced. It's super weird, but it reeeeaaally works!!! - oh, and try doing this facial 3 times a week ( dried oats, yogurt, and honey) smells yummy and works wonders.
i'm assuming you are talking about your face washing it multiple times a day will help in the long run (but don't over do it), also look in your local grocery store in the health and beauty section for products specific to oily skin (sometime they work), there are face pads that you can use to remove the existing oil for a quick fix as well also if you are young its just a hormone thing and you will most likely grow out of it if it really bothers you, you can also make an appointment with a dermatologist who may be able to help