Impulsivity describes a tendency to react to stimuli quickly and without much thought. It often involves unplanned risky behavior, action without forethought, and decreased sensitivity to immediate or long-term consequences. Historically, the definition of impulsivity has been inconsistent, although research on the topic dates back 2,500 years. The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) now categorizes impulse control issues separately from addictions and compulsions.
Read more at GoodTherapy.org