Mood swings in spring: seasonal fluctuations, causes, and ways to stabilize them

Жінка стоїть у парку під сонячним світлом навесні під час прогулянки на свіжому повітрі
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Жінка стоїть у парку під сонячним світлом навесні під час прогулянки на свіжому повітрі

In spring, many people notice mood swings: increased irritability or, conversely, reduced motivation and energy. Such mood swings in spring are often associated with the body’s adaptation to changes in the light cycle.

In most cases, these changes are temporary, but in some people they may represent manifestations of seasonal affective fluctuations.

Maintaining a stable sleep schedule, physical activity, and regular exposure to daylight helps reduce the severity of these symptoms.

Neural connections in the human brain — an illustration of nervous system changes and mood swings in spring

How changes in daylight affect mood

Light is one of the key factors influencing the regulation of mood and emotional state. It affects the activity of the suprachiasmatic nucleus of the hypothalamus — the central regulator of circadian rhythms.

An increase in daylight duration in spring:

  • changes melatonin secretion

  • affects serotonin synthesis

  • alters the balance of neurotransmitters

Neurotransmitter mechanisms

Neurotransmitter Function Possible effect of changes
Serotonin Mood regulation Improvement or instability of mood
Dopamine Motivation and energy Fluctuations in activity
Melatonin Sleep–wake cycle Sleep schedule disruption

The gradual increase in sunlight stimulates serotonergic systems in the brain, which is usually associated with improved mood.

However, during the adaptation period these processes may be accompanied by temporary emotional instability.

A woman standing outdoors in sunlight during a walk, which helps reduce mood swings in spring

Main symptoms of mood swings in spring

Mood changes in spring may manifest through various symptoms.

Symptom Possible mechanism
Irritability Neurotransmitter instability
Reduced motivation Dopamine fluctuations
Fatigue Circadian rhythm adaptation
Difficulty concentrating Sleep disruption

It is important to understand that short-term mood changes during seasonal transitions are a normal adaptive process.

At the same time, prolonged or pronounced symptoms may be associated with seasonal affective disorders that require consultation with a specialist.

A schematic illustration of circadian rhythms and the human brain explaining mood swings in spring

How to support psycho-emotional balance

Maintaining stable nervous system function in spring is based on several physiological principles.

Key recommendations

Practice Biological effect
Morning sunlight exposure Serotonin stimulation
Regular sleep Circadian rhythm stabilization
Physical activity Increase in dopamine
Social activity Support of psycho-emotional state

Regular outdoor walks and physical activity contribute to the natural increase of neurotransmitters responsible for emotional balance.

In addition, an important role is played by:

  • a stable sleep schedule

  • reduction of chronic stress

  • a balanced diet

Questions and answers

Why do mood swings appear in spring?
Mood swings in spring are associated with changes in daylight duration, restructuring of circadian rhythms, and adaptation of neurotransmitter systems. Changes in the production of serotonin, dopamine, and melatonin may temporarily affect emotional state, energy levels, and motivation.

Why does mood change in spring?
Due to the restructuring of neurotransmitter systems and changes in the light cycle.

Can seasonal changes cause depression?
Some people may experience seasonal affective disorders that require medical consultation.

Does physical activity help improve mood?
Yes, regular physical activity stimulates the production of serotonin and dopamine.

Conclusions

Mood swings in spring are often associated with the nervous system’s adaptation to changes in the light cycle and hormonal regulation.

In most cases these changes are temporary. Regular sleep, physical activity, and exposure to daylight help maintain a stable psycho-emotional state.

References

  1. Lam R.W., Levitan R.D. Pathophysiology of seasonal affective disorder. Journal of Psychiatry & Neuroscience.

  2. Rosenthal N.E. Seasonal affective disorder. New England Journal of Medicine.

  3. Wirz-Justice A. Biological rhythm disturbances in mood disorders. International Clinical Psychopharmacology.

  4. Walker M. Why We Sleep. Scribner.

  5. National Institute of Mental Health. Seasonal affective disorder overview.

  6. Harvard Medical School. Light exposure and mood regulation.

About the Author

Author Photo

Kateryna Braitenko is a Ukrainian journalist and author specializing in writing articles for pharmaceutical publications. She holds a philology degree from Donetsk National University and a pharmaceutical degree from the National Pharmaceutical University in Kharkiv. She lives in Kyiv and continues her career, covering relevant issues in medicine and pharmaceuticals.





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