As a parent, it can be difficult to recognize if your child is suffering from depression or just typical teenage angst. However, it is important to know the signs of depression and how best to support them through this difficult time. Here are some tips on recognizing depression in teens and how to support your child through a difficult time. What Is Depression?  Depression is a mental health disorder characterized by feelings of sadness, hopelessness, or loss of interest that lasts for at least two weeks.