It’s not always easy to diagnostic a depression. Sometimes, the first to detect some worrying signals, are the relatives or friends. A person that…

feels sad most of the day or every day
feels empty, useless and guilty
cries for everything and for nothing
loses interest for activities that before gave pleasure to do
feels anxious
have difficulty in concentrate and make decisions
have difficulty in sleeping or feels like sleeping the all day
feels tired most of the time
loses or gains weight without explanation
can have thoughts about death and …