 Hi, I'm Dr. Shelley Flanks with City's Tip for Kids from the American Academy of Pediatrics. All teenagers can be moody from time to time, but for some kids, sadness, fatigue, or anxiety could be signs of depression. If you think your child may be depressed, talk about what may be bothering her. Your pediatrician can help identify treatment strategies and steps to protect your child, such as removing weapons from the home. Depression can be treated. For more information, visit HealthyChildren.org.