Doomscrolling is endlessly scrolling through bad news, especially late at night. Your kid is glued to negative content and cannot stop. It IS worth gentle concern: doomscrolling is linked to anxiety, poor sleep, and low mood. Suggest screen-time limits and offline activities, but do so without judgement. If your kid uses it constantly, ask them where they first heard it, not to police their speech but to understand which online community they are in.