Feeling happier on some days and low on others is part of life. Mood swings become a concern when they are intense, frequent or harm relationships and work.
Different causes need different treatment, so assessment matters.
Key concepts
- Pattern matters: hours, days or weeks
- Triggers matter: stress, periods, alcohol, sleep loss
- A mood diary helps diagnosis
Symptoms and signs
- Days of low mood alternating with unusually high energy
- Intense anger or emotional reactions within hours
- Mood changes in the week before periods
Causes
- Bipolar spectrum or cyclothymia
- Emotional instability linked to personality or trauma
- Hormonal, thyroid or substance-related causes
Risk factors
- Family history of mood disorders
- Irregular sleep and shift work
- Alcohol or cannabis use
Evidence-based management
- Track mood, sleep, periods and substances for 4 weeks
- Regular sleep and meals
- Treatment based on cause: mood stabilisers, DBT skills, hormonal care
- Reduce alcohol and caffeine
When to seek professional help
- Swings affecting work, studies or relationships
- Risky behaviour during 'highs'
- Any thoughts of self-harm or suicide — call Tele-MANAS 14416 or 112 today
Frequently asked questions
Are mood swings a sign of bipolar disorder?
Not always. Bipolar episodes usually last days to weeks; moment-to-moment changes have other causes.
Can thyroid problems cause mood swings?
Yes. Both overactive and underactive thyroid can affect mood; a blood test helps.
Medical references
Guidelines and official sources used for this article.
- ICD-11 for Mortality and Morbidity Statistics. World Health Organization.
- Bipolar disorder: assessment and management (CG185). NICE, UK, 2014.
- Author
- Dr. Kuldeep Budania, MBBS, MD Psychiatry
- Medical reviewer
- Dr. Kuldeep Budania, MD Psychiatry
- Last reviewed
This article is for general information and is not a substitute for personal medical advice.
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