Depression is a common mental disorder that causes people to experience depressed mood, loss of interest or pleasure, feelings of guilt or low self-worth, disturbed sleep or appetite, low energy, and poor concentration. Depression is different from feeling down or sad.
Most people go through periods of feeling down, but when you’re depressed you feel persistently sad for weeks or months, rather than just a few days.
Some people think depression is trivial and not a genuine health condition. Depression isn’t a sign of weakness or something you can “snap out of” by “pulling yourself together”.