Depression

Also known as: Low mood, Clinical depression

Depression symptom guide: what it can mean, possible causes, and when to seek care. Educational only.

Overview

Depression is not one bad day; it can last weeks and make work hard. It may look like fatigue, irritability, or withdrawal. Professional and social support can help—asking for help is not weakness.

Possible causes

Long-term stress
Family history
Major life changes
Chronic medical conditions
Certain medicines or substances

When to see a doctor

Talk with a professional if sadness lasts more than 2 weeks, or you have thoughts of self-harm—get emergency help for those thoughts.