Mental Health Issues in Children: Know the Signs and Symptoms

Children don’t always have the words to explain how they feel. At times, their struggles may show up as sadness, moodiness, anger, or changes in behavior.

Some changes are part of normal development, but when they last longer or feel more intense, they may signal something more. Imagine a child who used to enjoy playing suddenly becoming withdrawn, or one who becomes easily upset over small things.

This resource page is here to help you better understand common mental health issues in children and how they may appear in everyday life. You’ll learn some warning signs to watch out for, along with guidance on when to take concerns more seriously.

Common Mental Health Issues Among Children

Children can experience a wide range of mental health challenges, and they don’t all look the same. Some children may seem constantly worried or on edge, while others may lose interest in things they once enjoyed.

Some common mental health challenges in children include:

• Anxiety Disorders - Children with anxiety may worry often, avoid certain situations, or complain of physical symptoms. Around 11% of children ages 3–17 experience anxiety disorders [*].
• Depression - Depression in childhood can manifest as prolonged sadness, irritability, low motivation, or withdrawal from enjoyable activities. Roughly 4% of U.S. children ages 3–17 have been diagnosed with depression [*].
• Attention-Deficit/Hyperactivity Disorder (ADHD) - ADHD can present as inattention, impulsivity, and hyperactivity. Approximately 11.4% (7 million) of U.S. children ages 3–17 are affected [*].
• Behavioral or Conduct Problems - Common signs include aggression, defiance, frequent rule-breaking, and difficulty controlling anger. Around 8% of U.S. children ages 3–17 are affected [*].
• Post-Traumatic Stress Disorder (PTSD) - PTSD can develop after a frightening experience. While many children experience trauma, only a minority develop PTSD, with higher rates in girls than boys [*].
• Obsessive-Compulsive Disorder (OCD) - OCD involves intrusive thoughts (obsessions) and repetitive behaviors (compulsions), such as excessive handwashing or checking. It affects about 1–2% of children and can disrupt daily life [*].
• Eating Disorders - Eating disorders involve unhealthy thoughts and behaviors around food or body image. They’re common in teens and are among the most life-threatening mental health conditions [*].
• Autism Spectrum Disorder (ASD) - ASD can affect social communication, including eye contact, conversations, and reading social cues. About 3.4% of U.S. children ages 3–17 have been diagnosed with ASD [*].

Emotional Warning Signs

Emotional warning signs reflect changes in a child’s feelings, mood, or reactions. These may serve as early indicators that something is not quite right.

• Persistent feelings of unhappiness or emptiness
• Being easily frightened or worried about things others brush off
• Snapping, lashing out, or overreacting to minor things
• Believing things will never get better or that they don’t matter
• Loss of interest in favorite activities
• Feeling as though they are always at fault
• Emotions that seem to change rapidly and without warning
• Struggling to cope with everyday challenges that others handle easily

Behavioral Warning Signs

Children, especially younger ones, may not have the words to describe what they’re feeling. Because of this, emotional pain is more likely to appear in their actions.

Note that one change in behavior is rarely serious. What matters more are consistent patterns across home, school, and social settings, especially when they don’t match the child’s developmental level.

• Refusing to attend school or making frequent excuses to stay home
• Seeming unable, rather than unwilling, to comply with expectations
• Frequent tantrums or outbursts
• Aggressive behavior toward others (hitting, pushing, verbal aggression, etc.)
• Needing to do things the same way every time and becoming very distressed if that changes
• Restlessness or constant movement
• Becoming quiet, distant, or emotionally unavailable
• A noticeable shift in appetite or relationship with food

Physical Warning Signs

The link between physical symptoms and mental health in children is well established. Children are especially sensitive to stress, and their bodies may show signs of distress before they can put their feelings into words.

• Physical aches that keep coming back, particularly around stressful situations
• Disrupted sleep patterns (restless nights or excessive sleeping during the day)
• A lack of energy that affects their ability to get through the day
• Physical habits like blinking, throat-clearing, or twitching that appear frequently
• Complaints of feeling unwell without a clear reason
• Carrying visible tension in their body — clenched jaw, tight shoulders, or a restless manner

Cognitive Warning Signs

A child struggling with their mental health is more likely to have difficulty concentrating and retaining information. As a result, keeping up with schoolwork becomes increasingly difficult [*].

Gaps in learning may accumulate, and the child may fall further behind. This is not because they lack ability, but because their mind is carrying a weight that leaves little room for learning.

• Trouble concentrating or staying focused on tasks or conversations
• Racing or intrusive thoughts
• Self-defeating or pessimistic thoughts
• Difficulty making decisions
• Forgetfulness or disorganization
• Finding it difficult to follow a task from beginning to completion
• Being harshly and repeatedly unkind to themselves, especially after mistakes
• Difficulty understanding social cues

Signs of Urgent Danger

Sometimes, a child’s mental health struggles reach a level that requires immediate attention. These red flags indicate the child may be at risk of harming themselves or others:

• Talking about wanting to die or end their life
• Expressing hopelessness or feeling like a burden
• Self-harming behaviors (cutting, burning, etc.)
• Aggressive or violent behavior toward others
• Threatening to use weapons
• Refusing food, water, or sleep for extended periods
• Acting in ways that seem disoriented or out of touch with reality
• Sudden and drastic changes in behavior or personality

Prompt evaluation by a qualified mental health professional, or calling 911 or going to the nearest emergency room, is important. Recognizing these signs early can save a child’s life.

What to Do If You Suspect Your Child Has Mental Health Issues

Begin by speaking with your pediatrician, family doctor, or school counselor, as they can help assess the situation and provide referrals to qualified mental health providers.

However, if there’s any risk that your child might hurt themselves or someone else, don’t wait. Call 911, head to the nearest emergency room, or contact a crisis hotline immediately.

When you meet with professionals, it helps to share detailed observations, such as changes in your child’s behavior, mood, sleep, appetite, or school performance.

Mention timing, frequency, and context for each concern, as this information allows providers to make the most accurate assessment and develop the right support plan for your child.

Talking with Your Child About Mental Health Issues

Many parents find it difficult to begin a conversation about mental health, whether their child has already been diagnosed or they’re simply noticing concerning behaviors.

As a therapist, one approach I recommend is to choose a time when both you and your child are in a good headspace — not during times of intense emotions like anger, frustration, or anxiety.

During the discussion, pay attention to your body language. Face your child, maintain eye contact, and keep an open posture. Listen without judgment and allow them to express themselves freely, even if what they share is hard to hear.

Validate their feelings by acknowledging their emotions. For example, you can say, “That sounds really hard” or “I can see why you feel that way.” Use age-appropriate language and ask open-ended questions to encourage your child to share more than a yes/no answer.

Keep in mind that these discussions can’t always be resolved in one sitting, so it’s important to remain patient. Maintain a calm demeanor so that your child knows it’s safe to share.

Resources

Reliable resources can help you feel prepared in supporting your child’s mental health journey. The websites below offer free education and guidance for parents and caregivers:

• Administration for Children and Families
• Centers for Disease Control and Prevention (CDC)
• Johns Hopkins Medicine
• The Kids Mental Health Foundation