Attention-deficit/hyperactivity disorder (ADHD) is a mental illness that is characterized by difficulties focusing and controlling impulsive behaviours. ADHD is usually diagnosed in young children, but if undiagnosed and unmanaged, can lead to continued problems into adulthood. Do you find it difficult to pay attention and focus on tasks? Are you feeling restless throughout your day, like you need to be constantly moving? Do you interrupt others and act impulsively? If these concerns are affecting your daily life and are ongoing, it could be a sign of adult ADHD.