—Ahmet C., Istanbul, Turkey Teens feel this way all over the world! Americans call it “brain fog.” First, get a checkup to make sure your health hasn’t changed. Then work to lower your stress and increase your activity. (If you’re in school, great!) Stop reading the news on your phone. Reduce use of social media to a minimum. Read a variety of whatever you enjoy. Don’t sleep late. Try to get outdoors every day. Exercise any way you like, but as much as you can. Hang on. All this will end!