All kids have their ups and downs, but if your child is unusually irritable, sad or withdrawn for a prolonged period of time she may be showing signs of depression. Depression is more than moodiness — it can affect all parts of a child’s life, including behavior, appetite, energy level, sleep patterns, relationships and academic performance. In this section you’ll find expert information on spotting and understanding different kinds of depression in children and adolescents, and how to get the most effective treatment for your child.