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What to know about ADHD in adults

Learn about ADHD in adults, including causes, symptoms, risk factors, complications, and effective treatment strategies to manage daily life.

May 1, 2026

Clinically reviewed by Caitlin Pugh, LCSW

9 min read

Clinically reviewed by Caitlin Pugh, LCSW

Attention-deficit/hyperactivity disorder, or ADHD, is a common condition that can cause difficulty paying attention, impulsivity, and hyperactivity. While it’s normal to struggle with focusing on a project occasionally, ADHD causes persistent symptoms that can affect a person’s daily functioning and quality of life. 

ADHD is commonly diagnosed in children, but many adults experience a first-time ADHD diagnosis, too. It’s estimated that about 6% of U.S. adults have the condition. Symptoms may develop in childhood and go undiagnosed (especially if a person learns to cope with them).

While ADHD can be debilitating, the condition is treatable, especially with therapy, medication, and lifestyle adjustments. 

Keep reading to learn more about ADHD in adults, how to identify signs of ADHD, possible causes, and available treatment options.

What is ADHD, and how does it affect adults?

You might wonder: What causes ADHD? ADHD is a neurodevelopmental disorder that affects a person’s executive functioning, including focus, organization, and emotional regulation. These symptoms can lead to problems with daily functioning in school or work and relationships and may also lead to symptoms of depression or anxiety.

It’s common for ADHD to be diagnosed during childhood or adolescence—before the age of 12, according to the DSM-5-TR—but ADHD symptoms sometimes go unnoticed and undiagnosed until adulthood, especially if someone learns to manage their symptoms without treatment. ADHD can cause different symptoms, depending on the subtype. There are three types of ADHD, including:

  • Inattentive type: This type of ADHD primarily causes difficulty paying attention and focusing, but not hyperactivity and impulsivity. 
  • Hyperactive-impulsive type: This type of ADHD primarily causes hyperactivity and impulsivity, but not difficulty paying attention. 
  • Combined type: This type of ADHD, which is most common, includes both inattention and hyperactivity/impulsivity.

Symptoms of ADHD in adults

ADHD affects a person’s executive functioning, which is the ability to plan, focus, and control behavior. Symptoms of ADHD can vary from person to person, depending on the type of ADHD. Some of the most common signs of ADHD in adults include: 

  • Difficulty sustaining attention on tasks: For people with ADHD, it can be challenging to pay attention to or focus on tasks and projects at home, school, or work. 
  • Impulsivity or difficulty controlling responses: Hyperactive-impulsive type ADHD can cause people to act without thinking or planning a response beforehand.
  • Disorganization and poor time management: People with ADHD often struggle with skills like organization and managing time, which may cause them to be late or miss appointments. 
  • Trouble completing projects: Even when it’s easy to begin a task, people with ADHD may lack the ability to follow through and complete them.
  • Forgetfulness or losing items frequently: ADHD can affect memory, leading to forgetfulness.
  • Restlessness or difficulty relaxing: Those with hyperactive-impulsive or combined type often experience difficulty settling down or resting. 
  • Challenges with prioritization and planning: With executive functioning problems, it may be difficult to prioritize tasks or plan projects (especially complex ones that require a lot of focus).

Causes of ADHD in adults

The exact cause of adult ADHD is unknown. Often, ADHD stems from multiple factors. Certain genetic and environmental factors can increase a person’s risk of developing ADHD:

  • Genetics and family history of ADHD: Mental health conditions such as ADHD can run in families, so having a family member with ADHD may increase your risk. 
  • Brain structure and neurochemical differences: Developmental differences that affect brain structure and function may contribute to the development of ADHD. 
  • Prenatal exposures or complications: Exposure to smoking and alcohol use in utero is another potential risk factor for ADHD.
  • Environmental stressors during childhood: Environment also plays a role in brain function. Some studies have shown lead exposure during childhood may be a risk factor for developing ADHD.

Daily life challenges for adults with ADHD

If left untreated, ADHD symptoms can make it hard to function in daily life. ADHD can affect people differently, depending on factors like the specific subtype and stress levels. It’s common for adults with ADHD to experience:

  • Work performance issues, missed deadlines, or frequent errors
  • Difficulty managing finances or paying bills on time
  • Strained personal and social relationships
  • Challenges with home organization and daily routines
  • Increased risk of comorbid conditions, such as anxiety or depression
  • Lower self-esteem due to repeated challenges

How ADHD can be treated and why treatment matters

ADHD can cause debilitating symptoms that affect a person’s mental health and overall well-being. Getting effective support for ADHD is one of the best ways to prevent its impact on functioning and long-term quality of life. Many evidence-based treatment strategies for ADHD exist, such as:

  • Therapy: Psychotherapy is one of the most effective ways to treat ADHD. Typically, therapy for ADHD involves education about how ADHD affects your life, along with providing strategies for changing behavior over time. Cognitive behavioral therapy (CBT), one common approach, helps identify the relationship between your thoughts, emotions, and behaviors and enables people to change patterns associated with ADHD.
  • Prescribed medication options: Prescription drugs, including stimulant and non-stimulant options, can improve ADHD symptoms by addressing brain differences. There are many different medications for ADHD, and your medical provider can help you determine the best option for you.
  • Coaching and organizational support: Behavioral coaching for ADHD helps people build systems and habits that can minimize symptoms and their effect on daily life. Coaching can be helpful for implementing therapeutic goals, but it’s not a replacement for therapy. 
  • Lifestyle and habit adjustments: Lifestyle modifications can play a supportive role in managing ADHD symptoms. Quality sleep, regular exercise, balanced nutrition, and a consistent daily routine can support brain function in people with ADHD and other mental health conditions. 

When to seek professional help for ADHD

It’s never too soon (or too late) to seek out professional support for ADHD. A trained professional can help identify the best treatment plan for you, so you can feel more like yourself. Not sure if it’s time to reach out to a mental health provider? It might be helpful to consider support if: 

  • Your ADHD symptoms interfere with school, work, or relationships
  • Self-management strategies aren’t enough to help you function in day-to-day life
  • You’re experiencing co-occurring conditions like anxiety, depression, or substance use challenges alongside your ADHD symptoms

It’s important to note that many other mental health symptoms can look like ADHD. Depression and anxiety, for example, can also make it hard to focus. Make it a point to get clarification on your symptoms—and eventual diagnosis—so you can be treated appropriately.

Take the next step in ADHD care

If your ADHD symptoms are impacting your daily life, a trained clinician can help. Evaluation from a qualified professional can help clarify your symptoms, confirm a diagnosis of ADHD if needed, and support treatment planning. 

ADHD for adults is already stressful enough, and finding the right therapist or psychiatrist shouldn’t be. Headway makes it easy to find providers who accept your insurance and offer virtual therapy for online ADHD treatment. In your search, you can filter providers by specialty, see verified insurance coverage, check real-time availability, and view clear pricing before booking. While ADHD can be challenging to live with, there’s hope for improving your symptoms and quality of life — especially with the right support system in place.

Find a therapist with Headway

This content is for general informational and educational purposes only and does not constitute clinical, legal, financial, or professional advice. All decisions should be made at the discretion of the individual or organization, in consultation with qualified clinical, legal, or other appropriate professionals.

© 2026 Therapymatch, Inc. dba Headway. All rights reserved. No part of this publication may be reproduced without permission.

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