1) Attention deficit hyperactivity disorder (ADHD) has an estimated worldwide prevalence of 5.29% and affects boys more than girls. 2) Risk factors for ADHD include biological and environmental factors such as gender, preterm birth, low birth weight, maternal obesity, smoking or drug use during pregnancy, and excessive screen time. 3) Diagnosis of ADHD involves using rating scales and considering biological and environmental risk factors; treatment includes non-pharmacological therapies as well as medications like methylphenidate and atomoxetine for children ages 6 and older.