While ADHD has been linked to a somewhat increased incidence of other common mental health issues, it is not directly related to anger. However, untreated ADHD symptoms often can lead to frustration and irritability that can lead to a lower frustration tolerance. ADHD has been associated with higher rates of impulsivity which could possibly, at times, be displayed as anger in certain instances- however anger is generally not a trait typically directly associated with ADHD.