Lack of love, lack of understanding, not enough support, someone 発言しました hormones, romantic または identity problems, embarrasment, lack of individual interaction/communication problems, wondering (or knowing) where they fit in at school -if they feel "less than" または feeling alienated または isolated ~just some ideas.
Lots of things, everyone has different triggers. It could be caused によって social interactions, school, friends, strangers. または pressures and stress caused によって family, friends, school, and life in general. hormones are a possibility as well.
Many children get depressed for all sorts of reasons like peer pressure, family issues wheather it's parents divorcing または a parent choosing a sibling over the other, school, friends, lack of friends, bullying, there's a lot of reasons.
