How to talk to your teen about difficult topics, according to an expert

From social media to mental health, parents have many worries when it comes to their teenagers — but often struggle when it comes to starting a conversation. 

In a recent survey, Gallup and the Walton Family Foundation found some of parents' top concerns include their kids future, experiences at school and online, physical safety and mental health.

"This was really interesting in the finding — they worry about this, but they also find those to be extremely hard conversations to have with their kids. So parents are holding both of those things at once," psychologist Lisa Damour, who also helped with the research, said Wednesday on "CBS Mornings."