So, how is best to react? Seadon’s advice for parents in this position is to respond, rather than react. “This is easier said than done, but when your teen is making nasty remarks to you, try to remain calm but state clearly to him that his behaviour towards you is unacceptable,” she said.
Article source: https://www.huffingtonpost.co.uk/entry/how-to-deal-with-mean-teen-comments_uk_695e852ee4b0b5ac29777e6c