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Bipolar Symptoms in Teens: Early Signs and Diagnosis

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Bipolar Symptoms in Teens: Early Signs and Diagnosis

Teenagers often experience emotional ups and downs, but sometimes behavior becomes so intense or unpredictable that parents’ wonders: Is this normal teen moodiness or something more serious—like bipolar disorder?

Teen Mood Swings vs Bipolar Disorder

Mood changes are common in adolescents as teens learn how to manage their feelings.  

"Adolescents can have intense mood shifts and responses,” says Kristin Francis, MD, a child and adolescent psychiatrist at Huntsman Mental Health Institute.  “It's hard for parents to distinguish if it's typical teen behavior or something more serious."

A key difference is to determine if your teen's mood changes are in response to a specific, definable situation, such as:

  • Irritability after being asked to do chores, get off their phone, or stop playing a video game.
  • Anger during a disagreement with parents about grades.
  • Withdrawing after conflict with a friend or significant other.

"Bipolar mood changes don't usually have a trigger, which is different than mood changes you may see in your teen from stressors at school, rules at home, or from conflicts with parents," Francis says.

What Is Bipolar Disorder?

Bipolar disorder (BD) is a mental health condition involving intense highs (mania) and lows (depression) in emotions and energy. People with the condition may also express unusual thoughts and behaviors.

While health care providers don't know the exact cause, risk factors include:

  • Family history of bipolar or other mood disorders
  • Stressful life events and trauma
  • Brain structure and function differences

Symptoms can last several days or weeks and come out of the blue. As bipolar disorder progresses, some teens may experience psychosis, which makes it difficult to tell what’s real.

Francis says, "A parent of a teen with bipolar disorder will report, 'My child hasn't been sleeping. They're talking about how they found a solution for free energy. And they're rearranging the furniture in their room all night. They're not understanding that they have to go to school or comply with expectations at home.'"

Early Warning Signs

One of the earliest red flags is a major decrease in sleep. 

"It's not just a teen who stays up all night and sleeps all day," Francis says. "A teen with bipolar stays up most of the night and then goes about their day normally."

Other common symptoms of bipolar disorder include:

  • DepressionOften appears first in early adolescence and are present before an episode of mania occurs.
  • Changes in conversation: They may talk fast and quickly switch from topic to topic during manic episodes. They aren't easily interrupted, but they may abruptly lose their train of thought.
  • Increased energy: A sudden and overzealous focus on a new project can be a sign of a manic episode.
  • Impulsiveness:  Acting without thinking it through, engaging in risky behavior, and ignoring physical limitations.
  • Hypersexuality:  More flirtatious behavior and seeking sexual partners.
  • Irritability: Increased anger and aggression.

Getting a Bipolar Diagnosis

While BD can appear at any age, it’s most often diagnosed in the 20s. Research indicates 1% of kids ages 14 to 18 meet the criteria. However, psychiatrists are cautious about making the diagnosis in teens for two reasons:

  1. Symptoms can overlap with other conditions. Early sign may resemble ADHD, depression, borderline personality disorder, disruptive mood dysregulation disorder, or oppositional defiant disorder.
  2. Medications carry significant side effects. Mood stabilizers, such as lithium, can affect growth, weight, thyroid, and kidneys. Antipsychotic medications can increase diabetes risk and cause weight gain or long-term neurologic effects.

When to Seek Help

Typical teen moodiness is expected. But if emotional changes are severe, persistent, or interfering with daily life, an evaluation from a professional child and adolescent psychiatrist can help families understand what’s going on.

Getting Immediate Help

Huntsman Mental Health Institute’s Youth Crisis Care Program offers immediate, short-term mental health support for youth ages 5–17 in a calm, supportive setting. Young people can stay for up to 23 hours while a compassionate care team evaluates their needs and identifies the next steps.

This program provides:

  •  Assessment and Evaluation: A mental health evaluation determines the appropriate level of care and follow-up support.
  • Medication Support: Medication may be prescribed to help relieve acute symptoms to stabilize mental health when needed.
  • Multidisciplinary Care: Psychiatrists, advanced practice clinicians, social workers, nurses, and psychiatric technicians provide specialized training for children and teens.
  • Care Planning and Referrals: Personalized treatment planning and connection to ongoing outpatient and community-based services.

Parents and guardians are included every step of the way to ensure a smooth transition to ongoing care.

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