Quick answer: Normal teenage moodiness comes and goes and doesn’t stop a teen from functioning. Depression lasts at least two weeks, shows up across home, school and friendships, and often looks like irritability, loss of interest, exhaustion, changes in sleep or appetite, and pulling away. If symptoms persist or your teen talks about death, get a professional evaluation.
If your teen is thinking about suicide, call or text 988 or call the Georgia Crisis and Access Line at 1-800-715-4225. In an emergency, call 911.
How we put this guide together
Perry Behavioral Health is a residential mental health program in Perry, Georgia, for middle and high schoolers, including teens with depression. This guide draws on national survey data from SAMHSA, research from the National Institute of Mental Health, and established clinical criteria for depression. It’s designed to help parents tell the difference, not to diagnose. Only a qualified clinician can do that.
How common is depression in teens?
Very common. According to SAMHSA’s 2024 National Survey on Drug Use and Health, 15.4% of adolescents aged 12 to 17, about 3.8 million teens, had a major depressive episode in the past year, and 11.3% had one with severe impairment. A national study of U.S. adolescents found the median age of onset for mood disorders was 13, right in the middle school years.
Moodiness vs. depression at a glance
| Factor | Normal moodiness | Possible depression |
| How long it lasts | Hours or a few days | Two weeks or more |
| Where it shows up | Usually tied to one situation | Home, school and friendships |
| Interest in activities | Still enjoys favorite things | Loses interest in things they used to love |
| Daily functioning | Keeps up with school and responsibilities | Grades, attendance or self-care slip |
| Sleep and appetite | Mostly normal | Noticeably more or less |
| How they talk about themselves | Frustrated, but bounces back | Worthless, guilty or hopeless |
1. It lasts two weeks or longer
Teens have bad days and bad weeks, especially after a breakup, a fight or a disappointment. Clinicians generally look for symptoms that last at least two weeks before considering depression. If your teen’s low mood or irritability doesn’t lift after a couple of weeks, it’s worth paying closer attention.
2. It looks more like irritability than sadness
In teens, depression often shows up as irritability, anger or a short temper rather than tearfulness. A teen who snaps at everyone, picks fights or seems constantly annoyed may be struggling with depression, not just “being a teenager.”
3. They’ve lost interest in things they used to love
Quitting a sport, abandoning a hobby, losing interest in friends or no longer caring about things that used to matter is a core sign of depression. Moody teens still light up around the things they enjoy. Depressed teens often don’t.
4. Sleep, appetite and energy have changed
Sleeping much more or much less than usual, constant exhaustion, and noticeable changes in appetite or weight can all signal depression. Some teens stay up all night and can’t get up for school. Others sleep through weekends and still feel tired.
5. School is slipping
Falling grades, missing assignments, trouble concentrating and skipped classes or school refusal can be early, visible signs. Depression makes it hard to focus, remember information and find the energy to keep up.
6. They talk about themselves harshly
Statements like “I’m stupid,” “I’m a failure” or “Nobody likes me” that keep coming up can reflect the worthlessness and guilt that often come with depression. Pay attention to how your teen describes themselves, not just how they act.
7. They’re pulling away
Spending all their time alone in their room, avoiding family meals, dropping friends or retreating into screens can be signs of depression. Some independence is normal at this age. Cutting off nearly everyone is not.
8. They’re using substances or taking risks
Some teens use alcohol, cannabis, vapes or other drugs to cope with feelings they don’t understand or can’t express. Reckless behavior can also be a sign of emotional pain. Substance use and depression often feed each other.
9. They talk about death or not wanting to be here
Any talk about death, suicide or not wanting to live requires immediate attention. Ask your teen directly whether they’re thinking about suicide, and get help right away. Call or text 988, or call 911 in an emergency.
What to do if you think your teen is depressed
- Talk with your teen. Share what you’ve noticed without blame, and ask how they’re feeling.
- Schedule an evaluation with your teen’s pediatrician, a therapist or a psychiatrist.
- Stay involved in treatment. Depression is treatable, and family support makes a real difference.
- Consider a higher level of care if weekly therapy hasn’t helped or symptoms are getting worse.
Perry Behavioral Health provides residential treatment for teen depression that combines group and individual therapy, daily schooling and family involvement. Call (478) 324-4948 to talk about your teen’s needs.
FAQ
How can I tell if my teen is depressed or just moody?
Look at how long it lasts and how much it affects daily life. Moodiness usually passes within hours or days and doesn’t stop a teen from functioning. Depression lasts at least two weeks and affects school, friendships, sleep and interest in activities. When in doubt, ask a professional.
What does depression look like in teenagers?
In teens, depression often looks like irritability, anger, withdrawal, exhaustion, changes in sleep or appetite, falling grades, loss of interest in activities, and harsh self-criticism. Some teens also use substances or take risks to cope. Not every depressed teen looks sad.
At what age does depression usually start?
Depression can begin at any age, but adolescence is a common starting point. A national study of U.S. adolescents found the median age of onset for mood disorders was 13, which is why middle school can be an important time to watch for signs.
Is teen depression treatable?
Yes. Therapy, and sometimes medication, help many teens recover. Treatment works best when started early and when families are involved. If weekly therapy isn’t enough, intensive outpatient, partial hospitalization or residential treatment can provide more support.
Should I worry if my teen spends all their time in their room?
Not necessarily. Teens need privacy and time alone. It becomes more concerning if your teen has cut off friends and family, stopped activities they enjoyed, or shows other signs like changes in sleep, falling grades or hopelessness for two weeks or more.