How being bullied affects your child as an adult

In 2012 social media platforms were buzzing about a girl named Amanda Todd. I remember going onto YouTube and watching a clip she had posted about being bullied. As a parent I felt helpless and then angry.  The fact that this could happen to one of mine, was not okay. 

There are various reasons why kids could bully. Kids sometimes torment others due to the way they have been treated. They assume this behaviour is normal, as it is all they know. In other cases it is a control issue by picking on someone smaller and physically or emotionally weaker. 

The issue of bullying is one that scares me. You do the best you can as a parent. Your child is ill, you take them to the doctor. Your child is battling at school, you arrange for a tutor. But how do you know if your child is being the victim of bullying, or even the bully?