Adult ADHD is a neuro-developmental disorder which can lead to people experiencing attentional difficulties, hyperactivity, impulsivity and/or emotional dysregulation. ADHD is often diagnosed in the childhood but a number of people continue to experience symptoms when they reach adulthood. Diagnosis of ADHD in childhood varies across countries but research indicates that at population level 4-5% of children and 2-3% of adults experience symptoms of ADHD that severely affect their day-to-day functioning. Many people who were not diagnosed with ADHD in childhood seek help when they become adults. Symptoms of Adult ADHD are more on the spectrum of attention deficit than hyperactivity. These attentional difficulties often lead to emotional dysregulation or impulsive behaviours. The biggest challenge to an accurate diagnosis of adult ADHD is that a number of other mental disorders can also cause impairment of attention and concentration. It is important to seek professional opinion because if not managed adequately Adult ADHD could lead to under achievement, anxiety, depression and or substance use disorders.