Symptoms 
Depression can present different symptoms, depending on the person. But for most people, depressive disorder changes how they function day-to-day, and typically for more than two weeks. Common symptoms include:

• Changes in sleep
• Changes in appetite
• Lack of concentration
• Loss of energy
• Lack of interest in activities
• Hopelessness or guilty thoughts
• Changes in movement (less activity or agitation)
• Physical aches and pains
• Suicidal thoughts

Preventing Self-harm in Teens: A Guide for Appropriate Intervention

Resources
Depression Screening
NAMI
ADAA