My 12 year old daughter recently told me that she has been hearing just one single voice since she was about 6. The voice doesn't tell her to do anything bad. But it concerns me. She still won't tell me much about it. She has also been depressed lately. She's never had a behavior problem and makes straight A's in school. I just need some advice. I don't know if this part of puberty and adolescents or maybe an underlying mental illness issue.