Depression in teens and children is more common than you realize. At any given moment up to 15% of teenagers can be depressed, and it is estimated that one in four will experience an episode of major depression in the high school years. Children who are suffering from depression may have signs such as irritability, boredom, social withdrawal, somatic complaints such as headaches or abdominal pain, poor sleep, and nightmares. There is also an increased risk of substance abuse behavior and if severe, suicidal thoughts. Symptoms may last for 4-6 weeks, but if they persist for more than 2 months, you should definitely seek professional help. Psychotherapy can be very helpful. If depression runs in the family, there may be a biological basis and depression medication may be considered as well.