Reasons for Impulsive Behavior. Impulsive behaviors can be a sign of mental illness, a part of our genetic make-up, or rooted in our personality.

What causes impulsiveness?

In addition to ADHD, there are also mental health issues, like phobias and mood disorders, that can lead to impulsive behaviors in kids. Lack of sleep can also cause impulsive behavior, as can stress and frustration. When kids are struggling with something in school or in everyday life, they may act out.

What is the root of impulsivity?

The personality trait of impulsivity has been linked to such negative behaviors as binge eating, drug abuse, problem gambling, reckless driving, and suicide. But what causes certain people to be impulsive? Probably genes, experts say. And very likely brain biology.