Why do you depressed, empty, helpless, sad, tired or listless suppression ...

 Nine appearance of a depression. Most of the day depressed, almost every day, been demonstrated in two ways, one subjective expression (if they feel empty, helpless, sad, etc.), and the other is someone else observed (love cry, etc.). teenagers showed inexplicable irritable mood .2. of the day most of the time, for all or nearly all of the services it was felt little interest or no interest, so almost every day (through own subjective expression, and proven experience of others) .3. no apparent weight loss diet is, or weight gain (eg, one month more than 5% body weight), or increased appetite, or loss of appetite, almost every day. 4. insomnia or sleepiness, nearly every day so .5. agitated or unresponsive, so almost every day (through their own subjective expression, and proven experience of others) .6. fatigue or listlessness, almost every day so .7. nothing felt or the environment, or the feeling of excessive, inappropriate guilt nearly every day, not only because of illness and self-blame or guilt .8. thinking or a reduced ability to concentrate, or hesitation undecided, so almost every day (through their own subjective expression, the feelings of others proven) .9. repeatedly thought of death (not only the existence of the fear of death), recurrent suicidal ideation without a clear plan or attempt suicide, or a clear suicide plan .