system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Major Depression

I am curious what depression is, the actual effects on the body, why it exists, like I'm 5 please :)
gpt
Feelings are your brain releasing chemicals. When you eat something tasty your brain releases happy chemicals and you feel happy. When you someone makes fun of you, your brain releases sad chemicals. People with depression don't have many happy chemicals. It makes them always sad even though good things happen to them. It makes them angry at themselves and they feel like they can't do anything right. It can make them have very little energy, too much or too little sleep, and eat too much or too little. If your parents had it your more likely to get it too. And it's a serious disease and telling someone with depression to 'cheer up' is like telling someone with a broken arm to 'get over it.' They need help from either talking to a friend, changing their lifestyle (exercising and eating better), or even sometimes pills to balance their brain chemicals.