Teenagers and their Inner Voices.

Scientist say that our inner voices are as a result of our brain activities and that we have an average of 15,000 to 20,000 thoughts daily. Most of which are negative. As teens and young adutls, do we experience inner voices and how should we handle it, especially the ones that say " your parents don't love you", "you are ugly" and "nobody wants to be around you"?