Sad or bad mood. A child may seem sad, lonely, unhappy, or grouchy. It can last weeks or months. A child may cry more easily. They may have more tantrums than before.
Being self-critical. Kids going through depression may complain a lot. They may say self-critical things like, "I can't do anything right." "I don't have any friends." "I can't do this." "It's too hard for me."
Lack of energy and effort. Depression can drain a child's energy. They might put less effort into school than before. Even doing little tasks can feel like too much effort. Kids may seem tired, give up easily, or not try.
Not enjoying things. Kids don't have as much fun with friends or enjoy playing like before. They may not feel like doing things they used to enjoy.
Sleep and eating changes. Kids may not sleep well or seem tired even if they get enough sleep. Some may not feel like eating. Others may overeat.
Aches and pains. Some children may have stomach aches or other pains. Some miss school days because of not feeling well, even though they aren't sick.