ELI5: depression
// explanation
What is depression?
Depression is when your brain gets stuck in a sad mood, kind of like when a toy gets wound up too tight and won't unwind. [1][2] It's not just feeling sad for a day or two—it lasts a long time and makes it hard to do things you normally enjoy, like playing with friends or eating your favorite snacks.
Why does it happen?
Sometimes our brains don't work the way they should, and the chemicals inside get out of balance, making it really hard to feel happy. [1][4] It's not your fault, just like getting a cold isn't your fault—it just happens to your body.
What does it feel like?
Imagine wearing really heavy, wet clothes all day—everything feels harder and slower, and you don't want to do things that normally make you smile. [3][5] Even fun activities feel boring, and you might feel tired a lot.
How do you fix it?
Doctors can help with special talking sessions (like talking to someone about your feelings) or medicine that helps your brain feel better. [1][4] It usually takes time, kind of like how a scraped knee takes time to heal.
// sources
Depression is a mood disorder that causes a persistent feeling of sadness and loss of interest and can interfere with your daily functioning.
Aug 29, 2025 ... Depressive disorder (also known as depression) is a common mental disorder. It involves a depressed mood or loss of pleasure or interest in activities for long ...
Depression is a mental state of low mood and aversion to activity. [3] It affects about 3.5% of the global population, or about 280 million people worldwide.
Depression (major depressive disorder) is a common and serious mental disorder that negatively affects how you feel, think, act, and perceive the world.
Depression is more than simply feeling unhappy or fed up for a few days. Most people go through periods of feeling down, but when you're depressed you feel ...
Video by Dr. Scott Eilers
Video by TED-Ed
Video by HealthyGamerGG
