HomeHealth TopicsMental Health BehaviorAttention Deficit Hyperactivity Disorder
Back to Mental Health Behavior
Attention Deficit Hyperactivity Disorder
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Mental Health Behavior

Attention Deficit Hyperactivity Disorder

ADHD is a neurodevelopmental disorder that typically begins in childhood and can continue into adulthood, marked by inattention, impulsivity, and hyperactivity.

Overview

ADHD is a neurodevelopmental disorder. It is usually first diagnosed in childhood and often lasts into adulthood. Some people are not diagnosed until they are adults. ADHD involves:

  • Having trouble paying attention (inattention)
  • Having trouble controlling impulsive behaviors (impulsivity)
  • Being overly active (hyperactivity)

Types

There are three types of ADHD:

  • Mostly Inattentive ADHD. People with this type have trouble paying attention and are easily distracted. It is hard for them to organize or finish tasks, and they may have trouble following instructions or conversations.
  • Mostly Hyperactive-Impulsive ADHD. People with this type show symptoms of both hyperactivity and impulsivity:
    • With hyperactivity, people feel a need to always be moving. They have trouble sitting still and may fidget and/or talk too much.
    • With impulsivity, people have trouble controlling their actions and words. They tend to act on sudden ideas or feelings without thinking about the possible results. They may interrupt others a lot or have trouble waiting their turn.
  • Combined ADHD. People with this type have a mix of inattentive and hyperactive‑impulsive symptoms. Combined ADHD is the most common type.

It is normal to sometimes have trouble paying attention or sitting still, especially for children. People with ADHD have more severe symptoms that can cause serious problems, such as failing grades for a child or job loss for an adult. The symptoms are ongoing and may affect family and social life, too.

Causes & Risk Factors

The exact cause of ADHD is unknown. ADHD probably results from a combination of factors, such as genetics and the environment. Researchers are looking at possible environmental factors that might raise the risk of developing ADHD. These factors include brain injuries, nutrition, and social environments.

Symptoms

People with symptoms of attention problems may often:

  • Miss details or make careless mistakes in schoolwork, at work, or in other activities
  • Have trouble staying focused on play activities or work tasks
  • Not seem to listen when spoken to directly
  • Find it hard to follow instructions or finish tasks, or may start but get easily sidetracked
  • Have trouble being organized, keeping belongings in order, and managing time
  • Avoid doing tasks that require long periods of mental effort
  • Lose important items, such as books, wallets, keys, eyeglasses, and cellphones
  • Forget about doing daily activities

People with symptoms of hyperactivity‑impulsivity may often:

  • Fidget and squirm while seated
  • Get up when staying seated is expected, such as at school or work
  • Run around or climb when it's not appropriate (children) or feel restless (teens and adults)
  • Have trouble doing quiet activities
  • Be constantly moving or “on the go”
  • Talk much more than is normal
  • Blurt out answers before questions are completed
  • Have trouble waiting for their turn
  • Interrupt others, for example during conversations or games

People with combined ADHD show a mix of inattention and hyperactivity‑impulsivity symptoms.

Diagnosis

There is no single test to diagnose ADHD. One step of the process involves a physical exam, including vision tests, hearing tests (for children and adults), and other tests to rule out other problems with symptoms like ADHD. Other problems with similar symptoms include anxiety, depression, sleep problems, and certain types of learning disabilities.

The process also involves a thorough medical history and family history, and it usually includes using standardized ADHD symptom checklists, questionnaires, and/or interview questions. These tools have rating scales that help the provider see if a person's symptoms and history fit a diagnosis of ADHD.

To make a diagnosis of ADHD, the provider needs to have found all of these things:

  • Several symptoms of ADHD that began before age 12.
  • Several symptoms of inattention and/or hyperactivity‑impulsivity that have lasted for at least 6 months and cause serious problems:
    • For children up to age 16, there must be at least 6 ongoing symptoms.
    • For people 17 and older, there must be at least 5 ongoing symptoms.
    • Symptoms that happen in 2 or more settings, for example, at home and at work or school.
    • Symptoms that clearly get in the way of functioning well at school, work, and/or in social situations.
    • Symptoms aren't caused by another mental health disorder.

Treatment & Management

Although there is no cure for ADHD, treatments may help reduce symptoms and improve functioning. ADHD is commonly treated with:

  • Medicines.
  • Psychotherapy (talk therapy), including behavior therapy.
  • Education or training for parents to give them the skills and strategies to help their child, especially important for younger children.
  • A combination of these treatments.

Good treatment plans will include close monitoring, follow‑ups, and making changes, if needed, along the way.

Having a healthy lifestyle, such as healthy eating and regular exercise, may also help manage symptoms.

For school‑aged children, school support is important. This could include classroom‑based behavioral interventions such as behavior management plans or teaching organizational and study skills. It may also include accommodations such as specific seating in the classroom, reduced classwork, or extended time on tests and exams.

Frequently Asked Questions

Start by keeping a detailed symptom diary for at least two weeks, noting when the behaviors occur, their intensity, and any triggers. Use standardized checklists like the Vanderbilt or Conners rating scales (available online) to quantify symptoms. Gather reports from teachers or caregivers, and observe how the child handles transitions, organization, and peer interactions. This information will help a clinician make a more accurate assessment.
Hyperactivity that lasts for several years, occurs in multiple settings (home, school, playground), and interferes with learning, social interactions, or sleep may indicate ADHD. Look for patterns such as frequent fidgeting, difficulty staying seated, impulsive talking, and trouble completing tasks. If these behaviors are persistent, intense, and affect daily functioning, it is worth discussing with a pediatrician or child psychologist.
Use structured schedules with short, timed work blocks (Pomodoro technique), set clear priorities, and minimize distractions by turning off notifications. Break tasks into smaller steps, use visual reminders, and practice mindfulness or brief physical activity breaks to reset attention. Regular check-ins with a supervisor or coach can also reinforce accountability.
Medication, such as stimulants or non-stimulants, helps regulate dopamine and norepinephrine levels, improving attention and reducing impulsivity. Behavioral therapy teaches coping strategies, organizational skills, and parent-child communication techniques. When combined, medication addresses the neurochemical component while therapy builds practical skills, leading to better overall outcomes and fewer side effects.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

kontakt@hittavard.se

Ⓒ 2024. Alla rättigheter förbehålls av juxt ab