ADHD is a neurobiological disorder that affects the brain’s executive functions, which involve attention, impulse control, and self-regulation.

There are three main types of ADHD: predominantly inattentive presentation, predominantly hyperactive/impulsive presentation, and combined presentation.

Inattentive symptoms include difficulty sustaining attention, being easily distracted, and struggling with organization.

Hyperactive/impulsive symptoms involve excessive restlessness, impulsivity, and difficulty waiting or taking turns. Individuals with ADHD may exhibit symptoms in one or more of these categories.

Genetic environmental, and neurological factors play a role in the development of ADHD.