What are the common signs of depression?They would likely notice a low mood. On top of that, they may feel quite lethargic and have low energy. They might also notice changes in their appetite (i.e., they might find that they've got a reduced appetite or alternatively that they are eating more than usual). In addition, they might experience difficulties in their concentration or motivation, as well as losing interest and pleasure in previously enjoyed activities. Some people may also have thoughts about not wanting to be here anymore, or about taking their life. They would be the most common symptoms someone experiencing depression might have.