Hi, welcome to MuT! :icon_chee
This could be from repeated touching of the face, like with a tissue to the nose, or with a mismatched foundation to your skin type. If you have very oily skin and are wearing a foundation made for normal, combination or dry skin, you'll probably find your foundation wearing out quicker than need be. Try using a mattifying foundation made for oily skin.
Also regarding oily skin: When skin is very oily, even the best products won't keep a fresh look all day. It's definitely recommended to do regular maintenance throughout the day to keep your makeup fresh (and on), such as blotting (waves to girl-geek!) and touching up with powder afterwards. I prefer using a brush w/ pressed powder instead of a puff because it doesn't apply as much and it helps prevent end of day, powder-caused cakiness. On the oiliest areas, such as the nose and chin, foundation breakdown is bound to happen. If these areas are also ones that needs good coverage, try keeping a little sample-sized bottle of foundation in your purse and touch-up with it when needed. I find that Lancome's sample bottles to be tiny and perfect! And free. :icon_smil