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  1. Major depressive disorder - Wikipedia

    Major depressive disorder (MDD), also known as clinical depression, is a mental disorder [10] characterized by at least two weeks of pervasive low mood, low self-esteem, and loss of interest or …

  2. Clinical Depression (Major Depressive Disorder): Symptoms

    Nov 30, 2022 · Clinical depression, also known as major depressive disorder (MDD), is a mental health condition that causes a persistently low or depressed mood and a loss of interest in activities that …

  3. Depression (major depressive disorder) - Symptoms and causes

    Oct 14, 2022 · Also called major depressive disorder or clinical depression, it affects how you feel, think and behave and can lead to a variety of emotional and physical problems. You may have trouble …

  4. Depression (Major Depressive Disorder): Symptoms and More

    Jul 5, 2025 · Major depressive disorder (MDD) is a common mood disorder characterized by persistent sadness and a loss of interest in activities, impacting mood, behavior, and physical functions.

  5. Psychiatry.org - What Is Depression?

    Depression (major depressive disorder) is a common and serious medical illness that negatively affects how you feel, the way you think and how you act. Fortunately, it is also treatable.

  6. Major Depressive Disorder: Symptoms, Causes, Treatment

    Dec 11, 2025 · What Is Major Depressive Disorder? Major depressive disorder (MDD) is a serious mood disorder causing mild to severe symptoms that persist for two weeks or longer and affect daily life.

  7. Major Depressive Disorder | National Alliance on Mental Illness ... - NAMI

    When more severe symptoms like lack of energy and hopelessness develop in multiple areas of a person’s life along with persistent sadness over at least two weeks, they may be experiencing a …

  8. Major Depressive Disorder (MDD) - MentalHealth.com

    Aug 7, 2025 · Major Depressive Disorder (MDD) is a common but serious mental health condition. This is more than just feeling sad or going through a rough patch; it’s a medical illness that causes a …

  9. Major depression: MedlinePlus Medical Encyclopedia

    Apr 19, 2025 · Depression is feeling sad, blue, unhappy, or down in the dumps. Most people feel this way once in a while. Major depression is a mood disorder. It occurs when feelings of sadness, loss, …

  10. Major depressive disorder (also known as major depression) is one of the most common mental disorders in the United States. It can seriously impact every aspect of a person’s life—affecting how …