How to know if you have oily skin?

The most obvious sign is a persistent shine. Your face, especially the T-zone (forehead, nose, and chin), might look greasy a few hours after washing. You might also notice that your pores look enlarged. Makeup can feel like it's sliding off by midday. Here’s a simple test. Wash your face with a gentle cleanser and pat it dry. Don't apply any products. Wait about an hour. If your skin looks shiny and feels slick, you likely have an oily skin type. Being prone to blackheads and breakouts is another common clue.