Signs and symptoms of teen depression can include irritability, annoyance, sadness, frustration, hopelessness, loss of interest, worthlessness, guilt, low self-esteem, agitation, and alcohol or drug use. The emotional changes can also be accompanied by associated symptoms like tiredness, insomnia, sleeping too much (hypersomnia), appetite changes, slowed thinking, isolation, poor grades, frequent school absences, poor hygiene, suicidal thoughts, difficulty concentrating, sensitivity to rejection, bleak outlook, self-harm, or angry outbursts.
As with many psychological conditions, the cause of teen depression is due to a mixture of genetic factors and environmental influences.

Depression is the experience of a sad, hopeless, or blue mood that is beyond the normal experience of sadness. Depression can occur in people of any age, including teens and young adults.
