Lack of love, lack of understanding, not enough support, someone 说 hormones, romantic 或者 identity problems, embarrasment, lack of individual interaction/communication problems, wondering (or knowing) where they fit in at school -if they feel "less than" 或者 feeling alienated 或者 isolated ~just some ideas.
Lots of things, everyone has different triggers. It could be caused 由 social interactions, school, friends, strangers. 或者 pressures and stress caused 由 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 或者 a parent choosing a sibling over the other, school, friends, lack of friends, bullying, there's a lot of reasons.
