The behavior of depressed children and teenagers often differs from the behavior of depressed adults. Signs of depression in children and adolescents include:

Increased irritability, anger or hostility

Acting out or sudden behavioral issues

Decreased interest in activities or inability to enjoy previously favorite activities

Frequent sadness, tearfulness, crying

Hopelessness

Persistent boredom; low energy

Social isolation, poor communication

Low self-esteem and guilt

Extreme sensitivity to rejection or failure

Difficulty with relationships

Thoughts or expressions of suicide or self-destructive behavior

While many parents are familiar with the moodiness that often comes hand in hand with adolescence, symptoms of depression are more severe and last longer.

Source: Children’s Health: Signs of depression | myfox8.com