Major depressive disorder (MDD), also known as depression, is a mental disorder characterized by at least two weeks of persistent low mood. It is often accompanied by low self-esteem, a loss of interest in normally enjoyable activities, low energy, and pain without a clear cause.
People may also occasionally have false beliefs, or see or hear things that others cannot. Some people have periods of depression separated by years in which they are satisfied with life, while for others, symptoms are nearly always present. Major depressive disorder can negatively affect a someone's personal life, work life, and education, as well as their sleeping and eating habits, and their general health.
These disorders alter how a person processes emotions and behave, as well as cause physical symptoms. Mild anxiety might be vague and unsettling, while severe anxiety may seriously affect day-to-day living.
Obsessive-compulsive disorder (OCD) is an anxiety disorder in which time people have recurring, unwanted thoughts, ideas or sensations (obsessions) that make them feel driven to do something repetitively (compulsions). Repetitive behaviors, such as hand washing, checking on things, or cleaning, can significantly interfere with a person’s daily activities and social interactions.
Personality is the way of thinking, feeling, and behaving that makes a person different from other people. An individual’s personality is influenced by experiences, environment (surroundings, life situations), and inherited characteristics. Someone’s personality typically stays the same over time. A personality disorder is a way of thinking, feeling, and behaving that deviates from cultural expectations, and causes distress or functional problems that can last over long periods of time.
A narcissistic personality disorder is a mental health condition in which people have an unreasonably high sense of their own importance. They need and seek too much attention and want people to admire them. People with this disorder may lack the ability to understand or care about the feelings of others. But behind this mask of extreme confidence, they are not sure of their self-worth and are easily upset by the slightest criticism.
A narcissistic personality disorder causes problems in many areas of life, such as relationships, work, school or financial matters. People with narcissistic personality disorder may be generally unhappy and disappointed when they're not given the special favors or admiration that they believe they deserve. They may find their relationships troubled and unfulfilling, and other people may not enjoy being around them.