Teenagers have a lot of different problems nowadays. In my opinion, stress, misunderstanding of parents, conflicts with teachers and peers are the main issues.
Firstly, pressure from teachers makes psychological state of any teenager worse. They don't understand that young people can't do homework all the time. As a result, they give a lot of homework and students are not able to do it well. Secondly, there is some problems with parents. Conflicts, misunderstanding, quarrels are influence teens badly. So, all these factors are teenager's problems with which they faces almost every day.