Everyone feels sad sometimes. It's totally normal to feel upset if a family member passed away, you didn't get a job you wanted, or if your boyfriend broke up with you. Most of the time, you'll not feel like doing anything, but soon you get over the grief, move on and feel like your happy self again.
Depression is different. It's a serious medical condition that affects your mood and your life. Let's test your knowledge to see what you know about this common disorder.