Low Mood vs Depression: What's the Difference?

Feeling sad, flat or discouraged for a while is part of life, but persistent low mood can sometimes be a sign of depression. The impact, duration and wider pattern of symptoms matter.

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What is low mood?

Low mood can follow stress, loss, relationship problems, illness or major life changes, although sometimes there is no obvious cause. It may involve sadness, worry, tiredness, irritability or reduced confidence and can improve after days or weeks.

When might depression be possible?

NHS guidance advises that low mood lasting around two weeks or more can be a sign of depression. Depression may involve persistent low mood or loss of interest and pleasure alongside changes in sleep, energy, appetite, concentration, self-worth or other symptoms. A proper assessment matters because physical health conditions and medicines can sometimes contribute.

When should you seek support?

Speak to a GP or appropriate mental health professional when low mood is persistent, causing distress or affecting daily life. In England, NHS Talking Therapies accepts self-referrals for anxiety and depression and you do not need a pre-existing diagnosis.

What can support wellbeing?

Staying connected, maintaining activity where possible, protecting sleep and using evidence-based self-help resources can be useful. These are supports, not a substitute for professional care when symptoms are significant.

If thoughts turn to self-harm or suicide

Seek help now. If you or someone else is in danger, call 999 or go to A&E. For urgent mental health help that is not an emergency, use NHS 111 online or call 111 and select the mental health option. Samaritans can be reached free on 116 123 at any time.

This article is educational and does not diagnose depression.