We get sad because when we experience something something emotional like a death or a pain, are nerve's send a message to the brain. Next, the brain reports to our feelings that we aren't happy....
we are sad when we feel a little lonely or hurtled or upset about something or broken heart or almost going to cry.
Seasonal affected disorder
Well, whatever makes you happy! Like... Watching TV Playing Games Reading
You can be sad by thinking about hurtful things, or listening to sad song or a sad piece of music which makes you think of sad things.
Dealing with Seasonal Affective Disorder
Light Therapy for SAD
Learn About Bipolar-Disorder
Can Depression Occur with Other Disorders