Mood swings and acne both before and after period, could this be caused by hormonal imbalance in teens?

Yes : yes hormonal changes during menstrual cycles can flare up acne and cause premensrtual symptoms like mood swings anxiety depression fluid retention etc

MOOD SWINGS ACNE: DO YOU TAKE ANY OTHER MEDICATIONS? IT SOUNDS LIKE A HORMONAL IMBALANCE AS YOU, YOURSELF, HAS SUGGESTED. PLEASE SEE YOUR PCP OR YOUR PEDIATRICIAN OR A GYNECOLOGIST. NOT TO WORRY . . . BEST LUCK.

Imbalance: Yes, that can happen. A visit to your pediatrician or gynecologist would be helpful.