I use "Mark" and "Avon" eyeshadow but no matter what kind i use, it always creases! What can i do to stop it?

Try an eyeshadow primer! Primers help your makeup go on smoother, as well as prevent creasing. I know urban decay makes the eyeshadow primer potion. That is sold at many places such as sephora or ulta. I know benefit also makes one that comes in a pot. As far as pricing, there is a wide range. ELF makes one that sells for a dollar and there is a Loreal one that sells for around eight dollars. The primer potion from urban decay is $18. Just search around and you will find something