<human>: I've heard that a lot of people get headaches from reading in bed. Is this true?
<bot>: Yes, it is true. Reading in bed can cause headaches because the light from your phone or tablet screen can be very bright and flicker at night when you're trying to sleep. You should try using an app like f.lux which will automatically adjust the color temperature of your display based on the time of day, so that it's less harsh and more comfortable for your eyes.