Low mood or depression
Feeling sad is a normal reaction; everyone feels low or down at times and children and young people (just like adults) can be upset by many different things that might occur.
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But if the feeling is more than just sad or it persists for a longer time, then everyday sadness or low mood may move into something more serious such as depression. Children and young people may see themselves and the future in a negative way, feel hopeless, or no longer feel or seem themselves.