ADHD (attention deficit hyperactivity disorder) is a condition characterized by developmentally inappropriate levels of inattention, hyperactivity, and impulsive behavior. To be diagnosed, the condition must cause significant impairment in daily functioning in at least two settings, usually meaning a child’s symptoms are present both at home and at school for at least six months (1).

Individuals with attention disorders may demonstrate the following symptoms(2):

• Have a hard time paying attention.
• Daydream a lot.
• Do not seem to listen.
• Are easily distracted from schoolwork or play.
• Forget things.
• Are in constant motion or unable to stay seated.

ADHD can be classified as one of three different subtypes based on an individual’s strongest symptoms (3).

• Predominantly Inattentive Type: It is difficult for the individual to organize or finish a task, to pay attention to details, or to follow instructions and/or conversations. The person is easily distracted or forgets details of daily routines.
• Predominantly Hyperactive-Impulsive Type: The individual fidgets and talks a lot. It is hard to sit still for long. Smaller children may run, jump, or climb constantly. The individual feels restless and has trouble with impulsivity. Someone who is impulsive may interrupt others often, grab things from people, or speak at inappropriate times. It is hard for the person to wait their turn or listen to directions. A person with impulsiveness may have more accidents and injuries than others.
• Combined Type: Symptoms of the above two types are equally present in the person.

To learn more about the specific symptoms of ADHD, please refer to the DSM-V criteria for ADHD.
Source: (1) The National Alliance on Mental Illness (NAMI).
Source: (2)The Center for Disease Control
Source: (3) DSM-IV