Depression can strike at any age, leaving its victim with a prolonged sense of sadness and hopelessness. Teens are especially vulnerable to depression due to hormonal changes and the stresses of school, peer pressure and parental conflicts. In a March 1, 2010, article CBSNews.com reported that teen depression can manifest differently from typical adult depression. It is important for parents to recognize the warning signs of adolescent depression.
Mood Changes
The teen suffering from depression usually exhibits sadness and a sense of hopelessness about the future. She may seem as if she just doesn't care about anything that used to matter to her, or she may be hostile, even when you are trying to be helpful. Those around her may describe her as defeated, quiet or angry.
Withdrawal
The depressed adolescent may keep up mandatory activities such as attending school, but withdraw from sports and civic activities. He may stop visiting his friends or stay home when the family goes out to dinner. His grades may begin to suffer due to his declining interest in his classes.
Tiredness
You may notice that your teen is tired much of the time and doesn't seem to be the bundle of energy he used to be. This can be gradual, requiring you to make a comparison of his behavior versus a year ago. He may have lost his playfulness with younger siblings and may not volunteer to walk the dog. He may abandon his normally elaborate grooming routine or clothing maintenance.
Giving Away Possessions
The depressed teen may give away her most beloved possessions. This may include her pet, her jewelry or keepsakes she has had since childhood. Often, her siblings may know of this while you may not. This warning sign can indicate severe depression and an impending suicide attempt.
Ominous Speech
Another warning sign indicating severe depression is ominous speech. This can vary from, "You won't have to worry about it much longer" to "I don't care anymore" to "You've been a good mother."
Weight Changes
Many teens who become depressed lose their appetite, occasionally suffering a significant weight loss. For other teens, a ballooning weight is indicative of a downward spiral of declining mental health.
Sleep Changes
The U.S. National Library of Medicine explains that the depressed teen may develop problems falling asleep. She may get little sleep most nights and have dark circles under her eyes. Alternatively, some adolescents with depression spend most of their spare time asleep.


