When it comes to beauty lessons, we sometimes have to learn the hard way and make the mistake before realizing we did something wrong. There are many common makeup mistakes, but the summer presents a whole new set of beauty mishaps to navigate —like discovering your mascara is running down your face in the pool, or realizing that you really do need to apply sunscreen on your lips, after they become swollen and blistered. Trust us, we’ve been there. To help you avoid any awkward (or painful) moments this season, we’re sharing some hard-earned wisdom on how to avoid the most common beauty mistakes. You’re welcome.