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Blog Secondary & Teens (13–18) Why Your Teen Feels So Tired: What Parents Need to Know About Fatigue and Mental Health

Secondary & Teens (13–18) Published 2026-07-24 · 2 min read

Why Your Teen Feels So Tired: What Parents Need to Know About Fatigue and Mental Health

Key Takeaways

1

Teenage girls are experiencing a dramatic 50% increase in fatigue post-COVID, but teenage boys' fatigue levels have remained stable.

2

Persistent fatigue is a red flag for underlying mental health struggles like anxiety and stress—not simply tiredness from poor sleep.

3

Parents can help by taking fatigue seriously, reducing over-commitment, and seeking professional support when warning signs appear.

Fatigue among teenage girls in Finland increased from 16.2% in 2018 to 24.3% in 2023, with strong associations to anxiety and internalizing problems (Frontiers in Child and Adolescent Psychiatry, 2024).

The Fatigue Crisis Among Teenage Girls

If your teenage daughter complains of constant tiredness despite getting enough sleep, she's not alone. A recent study published in Frontiers in Child and Adolescent Psychiatry compared teenage fatigue levels before and after the COVID-19 pandemic, and the results are eye-opening. Researchers surveyed over 5,500 teenagers aged 13–17 in Finland in 2018 and again in 2023, and what they found should concern every parent: fatigue among girls has surged dramatically.

In just five years, the proportion of teenage girls reporting significant fatigue jumped from 16.2% to 24.3%—nearly a 50% increase. For teenage boys, the numbers remained relatively stable. This striking difference between genders is a red flag that something important is happening in the lives of our teenage daughters.

The Mental Health Connection

Here's the critical insight: fatigue isn't just about being tired. The study found a strong link between persistent fatigue and mental health struggles, particularly anxiety and stress-related problems. Both girls and boys who experienced internalizing problems—like worry, sadness, and anxiety—showed significantly higher fatigue levels. The same applied to those with externalizing problems, such as behavioral challenges and emotional outbursts.

Think of fatigue as your teen's body's way of signaling that something emotional is weighing on them. When adolescents are anxious or stressed, their minds and bodies work overtime, depleting energy reserves. This creates a difficult cycle: stress causes fatigue, and fatigue makes it harder to cope with stress.

What This Means for Singapore Families

Singapore parents face unique pressures. Our education system is academically demanding, and the pressure to excel starts early. Many teens here juggle school, tuition, co-curricular activities, and family expectations—all while navigating the social complexities of adolescence. The pandemic added another layer: disrupted routines, social isolation, and uncertainty about the future.

The Finnish study suggests that girls may be more vulnerable to developing fatigue in response to these pressures. This could reflect how teenage girls tend to internalize stress more readily than boys, worrying silently about performance, relationships, and their futures. In a high-pressure environment like Singapore's, this pattern could be even more pronounced.

The study also identified other risk factors worth noting: teens living with one biological parent and those who are overweight showed higher fatigue levels. These findings remind us that fatigue isn't simply a personal weakness—family circumstances and overall wellbeing matter enormously.

Three Ways to Help Your Teen

  1. Take complaints of tiredness seriously. Don't dismiss your teen's fatigue as laziness or attention-seeking. Ask gentle questions about their emotional wellbeing: How are they feeling at school? Are they worried about anything? Is something bothering their friendships? Creating a safe space for conversation can help you identify underlying stress or anxiety.
  2. Balance achievement with rest. Review your teen's schedule honestly. Are they over-committed? Can you reduce tuition or activities to create space for genuine rest and unstructured time? Remember that downtime isn't wasted time—it's essential for mental and physical recovery, especially for stressed teens.
  3. Watch for warning signs and seek help early. If your teen's fatigue persists for several weeks, or if you notice withdrawal, mood changes, or declining grades alongside tiredness, consider consulting a school counselor or mental health professional. Early intervention can prevent small problems from becoming larger ones.

The message is clear: our teens—especially our girls—are struggling with fatigue linked to mental health challenges. By recognizing this connection, creating supportive environments, and addressing stress early, we can help them thrive during these critical years.

Discover whether your teen's exhaustion signals deeper issues—explore our expert resources and use our assessment tool to understand what your child might need.

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