The Co-occurrence of Anxiety and ADHD in Children and Adolescents

Does your child often seem anxious or fearful, and also has difficulty regulating their emotions and attention? Are they frequently distracted and report they “can’t think” during tests? If so, you may have wondered if your child has anxiety, ADHD or both?

In the realm of childhood and adolescent development, neurodevelopmental and mental health disorders frequently overlap, creating complex clinical profiles that require nuanced understanding and intervention. Two of the most common, and most frequently co-occurring, conditions in youth are Attention-Deficit/Hyperactivity Disorder (ADHD) and anxiety disorders. A study by the National Institutes of Health found that 25.1 percent of children between the ages of 13 and 18 in the United States have been diagnosed with anxiety disorders, while 9 percent of 13- to 18-year-olds have been diagnosed with ADHD.

These conditions do not exist in isolation. In fact, research indicates that 40 to 60 percent of students with ADHD have at least one coexisting disability, with anxiety disorders being among the most prominent. Strikingly, ADHD is also recognized as the number one misdiagnosis for anxiety, highlighting the profound overlapping symptoms between the two. The intersection of ADHD and anxiety in youth creates unique cognitive, behavioral, and emotional challenges. To effectively support these children, educators, parents, and clinicians must understand the core nature of both disorders, how they interact to impact learning and behavior, and the comprehensive strategies required to manage them.

Understanding the Core Disorders 

To untangle the comorbidity of these two conditions, it is essential to first understand their individual mechanics.

• ADHD is a biological, neurological, and primarily genetic condition that individuals are born with and must manage throughout their lives. It is fundamentally a developmental disorder of self-control that impairs an individual's attention span, impulse control, and activity level. More deeply, ADHD reflects an impairment in the capacity to regulate one's own behavior relative to the passage of time, and to keep future goals and consequences in mind. Children with ADHD often struggle with executive functioning skills, including working memory, planning, organization, and emotional regulation.

• Anxiety, on the other hand, is an instinctual, adaptive response that becomes maladaptive when it is triggered in the absence of real danger. Anxiety helps us prepare for actual threats or perform at our best, triggering the body's "fight-flight-freeze" response to defend itself. However, anxiety becomes a disorder when this physical and psychological alarm system malfunctions. It can be helpful to think of anxiety as a smoke alarm; while we do not want to remove the batteries in case of a real fire, an anxious child's alarm goes off every time they make toast.

Anxiety is experienced in three primary ways: physically (such as stomachaches, headaches, or tense muscles), mentally (worrisome, catastrophic thoughts), and behaviorally (avoidance, crying, lashing out, or excessive reassurance-seeking). Often, children cannot accurately label their feelings as "anxiety" and instead complain of somatic symptoms like feeling sick.

The Intersection: Why Diagnosis and Treatment is Complicated 

When a child has both ADHD and anxiety, the symptoms often masquerade as one another. For example, anxiety is a massive barrier to learning and can heavily mimic the inattention found in ADHD. When a child is highly anxious, their working memory—the ability to hold and manipulate information in the mind, plummets, making it incredibly difficult to recall salient information or focus on a lesson. Because children with ADHD also inherently suffer from poor working memory, teasing apart whether a child has forgotten a multi-step direction due to ADHD-related executive dysfunction or anxiety can be incredibly complex.

Furthermore, anxiety is not a constant state; it fluctuates based on internal triggers and life events. Experts note that for kids with anxiety, their abilities are defined by inconsistency—when they are calm, they can perform a task, but when they are anxious, their brain shuts down and they physically cannot. Because this is so inconsistent, adults frequently mistake this inconsistency for oppositional behavior, laziness, or ADHD-related distractibility.

Processing speed is another area of significant overlap. Children with the predominantly inattentive subtype of ADHD often exhibit a "sluggish cognitive tempo," characterized by a slow, lethargic work pace and mental fogginess. Conversely, children with anxiety also exhibit slow processing speeds, but for entirely different reasons: their output is slowed by intense self-doubt, uncertainty, second-guessing, and paralyzing self-consciousness. When a child has both conditions, their academic production can grind to a halt, leading to frustration.

Emotional Dysregulation and Rejection Sensitive Dysphoria (RSD) 

A defining feature of the ADHD-Anxiety overlap is severe emotional dysregulation. Children with ADHD inherently struggle to inhibit emotional responses, meaning that typical childhood frustrations are experienced and expressed with explosive intensity.

When anxiety is added to the mix, this emotional volatility frequently manifests as Rejection Sensitive Dysphoria (RSD). While RSD is not an officially recognized standalone disorder in the DSM-5, it is a conceptualization frequently used to describe an intensely painful emotional response to perceived rejection, criticism, or failure that is highly prevalent in individuals with ADHD. People with RSD are acutely sensitive to the opinions of others. Even the slightest hint of criticism can trigger overwhelming sadness, anger, shame, or embarrassment that is entirely out of proportion to the actual situation.

Because of this profound fear of failure and rejection, youths with RSD and anxiety often develop severe avoidance behaviors - refusing to attempt schoolwork, skipping classes, or withdrawing from social interactions to protect themselves from potential emotional pain. They may also develop intense perfectionism as a defense mechanism, striving to be flawless to avoid any possibility of criticism.

Behavioral Manifestations in Academic Settings 

In the classroom, the co-occurrence of these disorders frequently leads to behaviors that baffle and frustrate educators.

• Work Avoidance and Task Initiation: It is incredibly common for students with this profile to have trouble just getting started, persisting through challenges, and asking for help. To an observer, the child may appear defiant or unmotivated. However, this avoidance is rarely born of malice; it stems from prior traumatic experiences of feeling "frozen and stupid". When faced with a task that triggers these feelings, the child's "fight or flight" response is activated, their working memory fails, and they literally cannot begin.

• Meltdowns and Explosions: When an anxious child with ADHD is pushed past their threshold, they often experience a behavioral meltdown. In these moments, they suffer from poor self-regulation, fall into uncontrollable negative thinking cycles, become highly inflexible, and temporarily lose all social perspective-taking skills. It is vital for adults to recognize that an anxious child lashing out, throwing a tantrum, or fleeing the room is instinctually responding to a perceived threat. Asking a highly dysregulated child to reflect on their behavior (e.g., "How do you think that made your classmate feel?") in the heat of the moment is entirely ineffective, as their brain is currently incapable of empathetic reasoning; they must be allowed to calm down first.

• Negative Attention-Seeking: Children acting out often do so to gain attention, and negative attention is the most efficient, predictable form of attention to acquire. A common disciplinary tactic in schools is to ignore low-level negative behavior so as not to reward it. However, ignoring a child whose behavior is fueled by anxiety will cause their anxiety to spike further, accidentally conveying the message that the adult does not care, and escalating the situation to a level that can no longer be ignored.

• Perfectionism and Procrastination: Perfectionistic youths suffer from rigid, "black-and-white" thinking where anything less than flawless is viewed as a total failure. They tend to "catastrophize," imagining drastic and terrible consequences for minor mistakes. To cope with the overwhelming fear of making an error, these children frequently procrastinate, delaying the task until the last possible moment.

Treatment Options:

Treating a child with co-occurring ADHD and anxiety requires a multi-modal approach. While medication is a frontline treatment for ADHD symptoms (improving focus and impulse control), it does not cure the disorder and does not teach coping skills. Therefore, medical management must be paired with robust therapeutic and behavioral interventions.

Cognitive Behavioral Therapy (CBT) and Psychotherapy

Individual psychotherapy, particularly CBT, is highly recommended to help youth address feelings of frustration, low self-esteem, and the negative thought loops associated with academic and social challenges. A structured, four-step approach is widely utilized to help children manage anxiety:

• Step One: Learning About Anxiety. Children must be taught that anxiety is a normal, adaptive survival mechanism (the body's smoke alarm) that is currently misfiring. Understanding the biology of the "fight-flight-freeze" response helps demystify their terrifying physical symptoms.

• Step Two: Learning to Relax. Because anxiety lives in the physical body, children must be taught concrete somatic relaxation skills. Techniques include "calm breathing" (inhaling slowly through the nose and exhaling through the mouth) and progressive muscle relaxation (tensing and releasing muscle groups, or acting like a floppy "rag doll"). For younger children, visualizing blowing huge bubbles can make deep breathing accessible.

• Step Three: Challenging Scary Thoughts. Older children and teens must learn to identify their overly negative, catastrophizing thoughts and replace them with realistic, fair, and evidence-based thinking.

• Step Four: Facing Fears. Avoidance is habit-forming and ineffective in the long run. Children must be gradually exposed to their fears, starting with the least scary situations and slowly working up a hierarchy until their anxiety naturally begins to decrease in those environments.

De-escalation and Emotional Regulation Tactics

Adults must learn to de-escalate rather than exacerbate a child's anxiety.

• Cognitive Distractions: When a child is spiraling into negative thoughts (e.g., "I'm stupid"), simply sending them out of the room for a break leaves them alone to fester in their anxiety. Instead, a break must be paired with a cognitive distraction—such as having them read a book out loud, complete a Sudoku puzzle, or look for hidden pictures in a magazine. It is neurologically impossible to read aloud and ruminate on anxious thoughts simultaneously.

• Biofeedback: Tools like the EmWave monitor a child's heart rate and use digital games (like a black-and-white forest that fills with color as their heart rate drops) to make the abstract concept of "calming down" incredibly concrete and visible.

• Rehearsal: When a child is already exploding, working memory is offline and logic cannot be accessed. Therefore, calming strategies must be relentlessly rehearsed when the child is completely calm, building automaticity so that the coping mechanism does not require active cognition to deploy during a crisis.

Educational Accommodations and School-Based Strategies

The classroom environment must be heavily modified to remove barriers to learning and reduce the cognitive and emotional load on the student.

Executive Function Support: 

Because ADHD impairs executive functioning, the environment must act as the child's surrogate frontal lobe. Dr. Russell Barkley emphasizes that rules, instructions, and consequences must be made external, visible, and immediate.

• Previewing Work: To prevent work-avoidance triggered by the "fight or flight" response of seeing a new, daunting assignment, teachers can preview the work with the student earlier in the day, doing the first few problems together so the child knows they are capable. For high schoolers, the first few problems can be assigned as low-pressure homework the night before.

• Chunking: Assignments must be broken down into small, manageable chunks with separate deadlines to prevent the student from becoming overwhelmed.

• Eliminate Note-Taking Burden: Students with these profiles should not be required to simultaneously listen to a lecture and copy notes from a board. The cognitive load is too high, leading to distorted information and missed content. They must be provided with guided outlines or copies of the teacher's notes.

Testing and Performance Accommodations:

• Extended Time: Providing time-and-a-half or double time on assessments is critical. This relieves the anxiety of racing against the clock and compensates for the slow processing speed associated with both inattention and perfectionistic second-guessing.

• Avoid Countdowns: Teachers frequently use countdowns to end activities (e.g., "Five minutes left!"). This spikes anxiety in high-achieving, perfectionistic students who feel a compulsion to finish. Instead, teachers should privately approach the student and help them identify a "good stopping point".

• Private Praise: Publicly praising an anxious child can backfire by drawing unwanted peer attention. Praise and redirection should be delivered privately, using pre-arranged non-verbal signals. Praise should also be fact-based and focused on the student's effort and strategy use, rather than their performance or achievement.

• Environmental Modifications: Testing should occur in a separate, quiet environment. In the classroom, the student can use study carrels to block out visual distractions or noise-canceling headphones to mitigate auditory overload.

Home, Lifestyle, and Parenting Interventions

The home environment plays a profound role in either mitigating or exacerbating the symptoms of ADHD and anxiety. Children with this profile do not cope well with disorganized, spontaneous family styles; they require predictability, consistency, and a deep sense of safety.

Creating Predictability and Routines:

Anxious children feel much calmer when they know exactly what is expected of them and what the consequences of their actions will be. Setting firm, consistent limits helps children feel secure—it is a relief for them to know that adults are in charge.

Routines are highly effective at reducing anxiety, but because anxiety and ADHD inherently disrupt routines, parents must work diligently to maintain them. Visual schedules placed on the refrigerator can provide the child with a concrete sense of order and control. Transitioning to new routines should be done gradually, preparing the child in advance and soliciting their input to increase their buy-in.

Sleep and Biology:

A critical, yet often overlooked, component of managing ADHD and anxiety is sleep hygiene. Up to 75 percent of adults with childhood-onset ADHD exhibit a delayed circadian rhythm. This delay creates greater alertness in the evening, leading to severe difficulties initiating sleep. Consequently, the individual accrues massive sleep debt and suffers from daytime sleepiness, which directly exacerbates the severity of ADHD symptoms (like inattention and emotional volatility) and severely reduces their threshold for anxiety.

To combat this, parents must enforce strict bedtime routines lasting 15 to 30 minutes, doing the same activities in the exact same order every night to signal to the brain that it is time to wind down. All stimulating activities, especially electronic screen time, must be shut off at least an hour before bed. For older teens, the routine might include listening to soft music, practicing progressive muscle relaxation, or having one-on-one time with a parent to talk through the day's worries.

Parental Mindset and Modeling: 

Finally, parents must be taught not to personalize their child's behaviors. An explosive, defiant, or avoidant child is not inherently bad, manipulative, or lazy; they are struggling with profound neurobiological deficits in executive functioning and overwhelming physiological anxiety. Parents must praise effort, model self-acceptance when they themselves make mistakes, and utilize evidence-based behavioral management techniques (such as maintaining a 2:1 ratio of positive reinforcement to corrective feedback) to build a supportive home environment.

The co-occurrence of Attention-Deficit/Hyperactivity Disorder and anxiety in children and adolescents creates a highly complex web of cognitive, behavioral, and emotional vulnerabilities. Because the symptoms of one disorder frequently trigger or mimic the symptoms of the other—such as ADHD-related executive dysfunction causing academic failure, which in turn breeds severe performance anxiety and work avoidance—a piecemeal approach to treatment will fail. Success requires a unified, deeply empathetic, and highly structured approach.

By combining medical management when appropriate, targeted Cognitive Behavioral Therapy to reframe anxious thoughts, robust school-based accommodations to bypass executive function deficits, and predictable, loving home routines, caregivers and educators can dismantle the barriers these children face. With the proper evidence-based scaffolds in place, youths suffering from ADHD and anxiety can learn to regulate their nervous systems, advocate for their learning needs, and ultimately thrive.

About the Author: Adria Garrett Ph.D. is a licensed psychologist at the Center for Psychological and Educational Assessment (CPEA), a pediatric psychology practice serving families across the metropolitan Atlanta area. She specializes in psychoeducational evaluations for children, adolescents and adults with expertise in learning challenges, Autism and ADHD.