Attention-deficit/hyperactivity disorder (ADHD) has been called attention-deficit disorder (ADD) and hyperactivity. But ADHD is the preferred term because it includes the two main aspects of the condition: inattention and hyperactive-impulsive behavior.
Adult ADHD symptoms may include:
- Trouble focusing or concentrating
- Difficulty completing tasks
- Low frustration tolerance
- Frequent mood swings
- Hot temper
- Trouble coping with stress
- Unstable relationships
Many adults with ADHD aren't aware they have it — they just know that everyday tasks can be a challenge. Adults with ADHD may find it difficult to focus and prioritize, leading to missed deadlines and forgotten meetings or social plans. The inability to control impulses can range from impatience waiting in line or driving in traffic to mood swings and outbursts of anger.
All adults with ADHD had ADHD as children, even if it was never diagnosed. Some people with ADHD have fewer symptoms as they age, while others continue to have significant symptoms as adults.
What's normal and what's ADHD?
Almost everyone has some symptoms similar to ADHD at some point in their lives. If your difficulties are recent or occurred only occasionally in the past, you probably don't have ADHD. ADHD is diagnosed only when symptoms are severe enough to cause ongoing problems in more than one area of your life. These persistent and disruptive symptoms can be traced back to early childhood.
Diagnosis of ADHD in adults can be difficult because certain ADHD symptoms are similar to those caused by other conditions, such as anxiety or mood disorders. And many adults with ADHD also have at least one other mental health condition, such as depression or anxiety.
When to see a doctor
If inattention, hyperactivity or impulsive behavior continually disrupts your life, talk to your doctor about whether you might have ADHD. Because signs of ADHD are similar to those of a number of other mental health conditions, you may not have ADHD — but you may have another condition that needs treatment.
While the exact cause of ADHD is not clear, research efforts continue.
Multiple factors have been implicated in the development of ADHD. It can run in families, and studies indicate that genes may play a role. Certain environmental factors also may increase risk, as can problems with the central nervous system at key moments in development.
You're potentially at increased risk of ADHD if:
- You have blood relatives (such as a parent or sibling) with ADHD or another mental health disorder
- Your mother smoked, drank alcohol or used drugs during pregnancy
- Your mother was exposed to environmental poisons — such as polychlorinated biphenyls (PCBs) — during pregnancy
- As a child, you were exposed to environmental toxins — such as lead, found mainly in paint and pipes in older buildings
- You were born prematurely
ADHD has been linked to:
- Poor school performance
- Trouble with the law
- Problems at work
- Alcohol or drug abuse
- Frequent car accidents or other accidents
- Unstable relationships
- Financial stress
- Poor physical and mental health
Although ADHD doesn't cause other psychological or developmental conditions, a number of other disorders often occur along with ADHD. These include:
- Mood disorders. Many adults with ADHD also have depression, bipolar disorder or another mood disorder. While mood problems aren't necessarily due directly to ADHD, a repeated pattern of failures and frustrations due to ADHD can worsen depression.
- Anxiety disorders. Anxiety disorders occur fairly often in adults with ADHD. Anxiety disorder may cause overwhelming worry, nervousness and other symptoms. Anxiety can be made worse by the challenges and setbacks caused by ADHD.
- Personality disorders. Adults with ADHD are at increased risk of personality disorders, such as borderline personality disorder or antisocial personality disorder.
- Learning disabilities. Adults with ADHD may score lower on academic testing than would be expected for their age, intelligence and education.