Depression, also called major depressive disorder or clinical depression, is a mood disorder whose symptoms include persistent sadness or lack of interest in life. Most of us feel sad, lonely, or depressed at times. This is a normal reaction to loss, struggles in life, or damaged self-esteem. But when intense sadness—which includes feeling helpless, hopeless, and worthless—lasts from days to wee...

ADHD Definition and Symptoms ADHD, short for Attention Deficit Hyperactivity Disorder, is a common neurodevelopmental disorder that primarily affects children and adolescents but may persist into adulthood. The main characteristics of ADHD are inattention, hyperactivity and impulsivity, which can lead to difficulties in learning, social interaction and daily life. ! The symptoms of ADHD can be ...