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

    Oct 14, 2022 · Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest. Also called major depressive disorder or clinical depression, it affects how you feel, think …

  2. Depressive disorder (depression)

    Aug 29, 2025 · Key facts Depression is a common mental disorder. Globally, an estimated 5.7% of adults suffer from depression. More women are affected by depression than men. Depression can …

  3. Depression - World Health Organization (WHO)

    Mar 30, 2017 · Depressive disorder, or depression, is a common mental health condition that can happen to anyone. It is characterized by a low mood or loss of pleasure or interest in activities for …

  4. Depression - World Health Organization (WHO)

    Mar 30, 2017 · Depression Depression Depression is a common illness characterized by persistent sadness and a loss of interest in activities that one normally enjoys, accompanied by an inability to …

  5. Clinical depression: What does that mean? - Mayo Clinic

    May 13, 2017 · What does the term "clinical depression" mean? Depression ranges in seriousness from mild, temporary episodes of sadness to severe, persistent depression. Clinical depression is the …

  6. Depression (major depressive disorder) - Mayo Clinic

    Oct 14, 2022 · Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest and can interfere with your daily functioning.

  7. Mental disorders - World Health Organization (WHO)

    Sep 30, 2025 · WHO fact sheet on mental disorders, including sections on anxiety disorders, depression, bipolar disorder, Post-Traumatic Stress Disorder, schizophrenia, eating disorders, …

  8. Seasonal affective disorder (SAD) - Symptoms & causes - Mayo Clinic

    Dec 14, 2021 · Seasonal affective disorder (SAD) is a type of depression that's related to changes in seasons — SAD begins and ends at about the same times every year. If you're like most people with …

  9. Persistent depressive disorder - Symptoms and causes

    Dec 2, 2022 · Persistent depressive disorder is not as severe as major depression, but your current depressed mood may be mild, moderate or severe. Because persistent depressive disorder is long …

  10. Nervous breakdown: What does it mean? - Mayo Clinic

    Apr 26, 2023 · Nervous breakdown isn't a medical term. It most often means a mental health crisis that affects your ability to meet your own needs and do daily tasks.