Many parents first notice something small rather than dramatic: a stomachache every school morning, a child who stops joining games they used to love, or homework that drags on for hours because attention keeps drifting. These patterns are common, and they are not character flaws. This guide explains how the most common youth mental health conditions can show up in children and teens, why symptoms often overlap, what a thorough evaluation looks at, and when to reach out for help. It is educational and not a substitute for an assessment. If your child is in immediate danger, call 911, the nearest ER, or call or text 988.
Key Takeaways
- According to the CDC, anxiety, depression and behavior disorders are the most commonly diagnosed mental health conditions in children.
- Depression in children and teens can look like irritability, low energy or pulling away rather than obvious sadness.
- ADHD, anxiety and depression often occur together and can look alike, so one symptom or checklist is not enough for a diagnosis.
- OCD usually starts between late childhood and young adulthood, and eating disorders are serious illnesses that respond to early treatment.
- Changes that last for weeks, cause distress or get in the way of school, home or friendships are a good reason to ask for an evaluation.
How Common Are Youth Mental Health Conditions?
Mental health concerns in childhood are more common than many families expect. The CDC reports that nearly 1 in 5 children ages 3 to 17 had ever been diagnosed with a mental, emotional or behavioral health condition, and that anxiety problems, depression and behavior disorders are the most commonly diagnosed. The CDC also notes that most conditions become more common with age, and that diagnoses do not tell the whole story: some children have symptoms without meeting criteria for a diagnosis, and others meet criteria but have not been diagnosed.
The National Institute of Mental Health (NIMH) lists anxiety disorders, ADHD, depression and other mood disorders, eating disorders and post-traumatic stress disorder among the conditions that can begin in childhood. NIMH also notes that early treatment can help children manage symptoms and support their social and emotional well-being.
What Anxiety, Depression and ADHD Look Like in Kids
Anxiety. Children often cannot name worry directly. It may show up as frequent fear or worry, clinginess, trouble separating from caregivers, avoiding certain places or activities, or stomachaches and headaches with no known medical cause. For more on how anxiety appears at different ages, see anxiety treatment types, including pediatric anxiety.
Depression. In children and teens, depression does not always look like sadness. NIMH lists signs such as losing interest in things they used to enjoy, low energy, sleeping too much or too little, and spending more time alone. Many parents notice irritability first. To tell everyday ups and downs from something more, see teen depression vs. normal mood swings.
ADHD. ADHD involves ongoing inattention, hyperactivity and impulsivity, or a mix, that shows up across settings like home and school. NIMH notes that a child who is in constant motion and cannot sit quietly, except when doing something they enjoy, may benefit from an evaluation. Medication questions are covered in a parent’s guide to pediatric ADHD medications.
OCD, Eating Disorders, and Conduct-Related Conditions
OCD. According to NIMH, obsessive-compulsive disorder involves unwanted, recurring thoughts (obsessions), repetitive behaviors (compulsions), or both. Symptoms can begin at any time but usually start between late childhood and young adulthood. Unlike ordinary habits or worries, OCD symptoms are often time-consuming, cause real distress and get in the way of daily life. A child might check or repeat things many times out of fear that something bad will happen. It is also common for people with OCD to have a mood or anxiety disorder. Learn more on the OCD care and ERP page.
Eating concerns. NIMH describes eating disorders as serious illnesses marked by severe disturbances in eating behaviors, and notes that they can be life-threatening. Warning signs in older children and teens include dieting or exercising excessively or a strong fear of gaining weight. People with eating disorders are also at higher risk for depression, anxiety and substance use disorders. NIMH notes that eating disorders can be treated successfully and that early detection and treatment are important. If you notice these signs, start with your child’s pediatrician, since medical monitoring is often part of care.
Behavior and conduct-related conditions. The CDC counts behavior disorders among the most commonly diagnosed mental health conditions in children. These involve ongoing patterns of defiant, angry or disruptive behavior that go beyond typical limit-testing and cause problems at home or school. Because irritability and outbursts can also come from anxiety, depression, ADHD or stress, an evaluation helps sort out what is driving the behavior.
Substance Misuse: A Concern for Teens
Substance use can show up alongside mental health concerns in the teen years. In the CDC’s 2023 survey of U.S. high school students, about 22 in 100 reported drinking alcohol and 17 in 100 reported using marijuana in the past 30 days. NIMH lists smoking, drinking or using drugs among the signs in older children that may call for an evaluation. For how substance use and mental health conditions affect each other, see substance use disorder and dual diagnosis.
What Causes Youth Mental Health Conditions?
There is rarely a single cause. NIMH research on childhood disorders studies risk factors including genetics, experience and the environment. The CDC notes that adverse childhood experiences (ACEs), which are potentially traumatic experiences in childhood, can have a lasting impact on mental and physical health, while positive childhood experiences, such as safe, stable and nurturing relationships, are linked with fewer diagnosed mental health conditions. Changes or stress at home or school can also play a part, which is why an evaluation looks at the whole picture.
Is It ADHD, Anxiety, Depression, or More Than One?
Once you have a name for what you are seeing, a harder question often follows: is this one condition or more than one? Symptoms overlap. Trouble paying attention, for example, can come from ADHD, worry, low mood, poor sleep or a learning difference. Restlessness and meltdowns can also reflect sensory sensitivities; see ADHD vs. anxiety vs. sensory overload in children.
This is why a diagnosis should not rest on a single symptom or checklist. NIMH explains that a comprehensive evaluation of a child usually includes:
- A parent interview about development, temperament, relationships, medical history, interests and any prior treatment.
- Information from school, such as reports on behavior, abilities and difficulties.
- When needed, an interview with the child, testing and observation.
An evaluator also looks at timing and context: has the concern been present for years across settings, or did it start recently? When more than one condition is present, the care plan can address them together.
When Struggles Are More Than a Phase
All children are sad, anxious, irritable or restless at times, and most of the time these are typical phases. NIMH suggests seeking help if your child’s behavior or emotions last for weeks or longer, cause distress for your child or your family, or interfere with how your child is doing at school, at home or with friends. Signs worth a closer look include:
- Frequent tantrums or irritability much of the time.
- Ongoing fear or worry, or avoiding school and activities.
- Big changes in sleep, energy or appetite.
- Repeating actions or checking things many times out of fear.
- Pulling away from friends or family, or a recent drop in grades.
- Dieting or exercising excessively, or a strong fear of gaining weight.
How to Help Your Child or Teen Right Now
A good first step is talking with people who see your child often, such as teachers or caregivers, and then with your child’s pediatrician, who can refer you to a mental health professional experienced with children. For the everyday pressures teens face, see core adolescent mental health issues and the broader teen mental health guide.
While you look for care, a few steps can help:
- Write down what you notice, when it happens and how long it lasts.
- Keep routines for sleep, meals and school as steady as you can.
- Listen calmly and let your child know you are there to help, without pressure to explain everything at once.
- Ask prospective providers the questions NIMH suggests, such as whether they use research-supported approaches, how parents are involved and how progress will be measured.
Therapy and Medication Options for Kids
Treatment depends on the evaluation, the child’s age and the family’s goals. NIMH notes that effective psychotherapy for children often includes parent involvement, skills to practice at home or school between sessions, and progress that is tracked over time. Common approaches include:
- Cognitive behavioral therapy (CBT): helps children notice unhelpful thoughts and practice coping skills, often with gradual steps toward feared situations for anxiety (see CBT and ACT therapy for anxiety and depression).
- Exposure and response prevention (ERP): a form of CBT used for OCD that helps children face fears while resisting compulsions.
- Play therapy: helps younger children express feelings through play when words are hard; see how play therapy works for young children.
- Parent support and family counseling: gives caregivers strategies for difficult emotions and behavior and helps the whole family adjust.
- Medication: depends on the diagnosis and is often used together with therapy. When several providers are involved, NIMH notes that treatment information should be shared and coordinated.
Children whose challenges affect learning may also benefit from school accommodations; see 504 plans and IEPs for mental health in Maryland schools.
Blue Sails offers child and adolescent mental health care in Maryland, including support for elementary school children, therapy and psychiatric support for tweens and teenagers, play and expressive therapy, ADHD testing and medication management and psychiatric evaluations. Families can start with client intake.
For a broader overview of teen mental health, family communication and when to seek support, see the relationships, family and teens guide.
For a broader overview of children, teens and school mental health, and when to seek support, see the children, teens and school guide.
Frequently Asked Questions
What are the most common mental health conditions in children?
According to the CDC, anxiety problems, depression and behavior disorders are the most commonly diagnosed. ADHD, OCD, eating disorders and PTSD can also begin in childhood or the teen years.
How is OCD different from ordinary worries or habits?
OCD involves unwanted, recurring thoughts, repetitive behaviors, or both. Unlike everyday habits, OCD symptoms are often time-consuming, cause real distress and get in the way of daily life.
When should I get my child evaluated?
NIMH suggests seeking help when behavior or emotions last for weeks or longer, cause distress for your child or family, or interfere with school, home or friendships. Your child’s pediatrician is a good place to start.
Why do youth mental health statistics differ between studies?
Studies use different age ranges, definitions, time frames and sources, such as parent reports, youth surveys or diagnoses. The CDC also notes that some children have symptoms without a diagnosis, and some meet criteria but have not been diagnosed.
Can a child have more than one condition at once?
Yes. Anxiety, depression and ADHD often occur together, and OCD commonly occurs with mood or anxiety disorders. A thorough evaluation helps sort out what is going on and where to start.
Sources
Sources: CDC — Data and Statistics on Children’s Mental Health, NIMH — Children and Mental Health: Is This Just a Stage?, NIMH — Obsessive-Compulsive Disorder, NIMH — Eating Disorders.