Feeling depressed can happen for many reasons and often there is no single cause. It may be due to a combination of factors including stressful or upsetting life events (such as bereavement, relationship problems, illness, job or financial worries), genetic vulnerability, brain chemistry imbalances affecting mood-regulating neurotransmitters, hormone changes, and environmental or social difficulties. Sometimes depression results from a "downward spiral" where one problem leads to another, amplifying feelings of low mood. It can also happen without an obvious external trigger due to biological factors like inherited genes or brain chemistry changes. Depression is more common in people facing difficult social or economic situations, and it can be triggered or worsened by isolation, lack of support, or ongoing stress. The good news is depression is treatable and understanding the causes can help in finding the right support and coping strategies for managing it.
If someone is feeling this way, reaching out for professional help or talking to supportive people can be an important step. Depression is not a personal failing and help is available to improve how one feels.