Why Do We Feel Sluggish in September? ──Understanding 'September Sickness'
“Summer Is Over, So Why Do I Feel Tired in September?”
Have you ever thought, “I made it through summer, but now that September is here, I suddenly feel sluggish”?
Maybe you’ve felt unusually down, struggled to wake up in the morning, or noticed your energy dropping for no clear reason.
This common phenomenon is known as “September sickness.”
In this article, we’ll explore what it is, how it differs from summer and autumn fatigue, its main causes, and effective ways to prevent it.
What Exactly Is September Sickness?
Let’s clarify the differences:
-
Summer fatigue
Caused by extreme heat and humidity, often leading to appetite loss and exhaustion. -
Autumn fatigue
Lasts into September and October, typically triggered by temperature fluctuations and air conditioning. -
September sickness
A state of physical sluggishness and low mood that appears once the weather cools down.
Medically, it resembles mild autonomic nervous system disorder or seasonal depression.
👉 In short: summer’s hidden fatigue often surfaces in September.
Main Symptoms of September Sickness
Common signs include:
- Trouble waking up in the morning, restless sleep
- Appetite loss—or sometimes overeating
- Low motivation, depressed mood
- Stiff shoulders, headaches, dizziness
- Ongoing fatigue and poor concentration
A 2024 survey by Japan’s Ministry of Health, Labour and Welfare found that complaints of sluggishness and low mood during seasonal transitions are rising, especially among people in their 20s to 40s.
Why Does It Happen in September?
Several overlapping factors can trigger September sickness:
1. Autonomic Nervous System Disruption
- Hot days but chilly mornings and evenings create temperature-difference stress.
- The body struggles to regulate its internal rhythm.
2. Carryover from Summer Fatigue
- UV exposure, disrupted sleep, and air-conditioning strain add up.
- The effects often erupt in early autumn.
3. Reduced Daylight Hours
- Shorter days in September lower serotonin levels.
- This can trigger low mood and mild seasonal depression.
4. Back-to-School and Work Stress
- The return to structured routines adds mental and emotional stress.
How to Prevent and Ease September Sickness
1. Reset Your Daily Rhythm
- Go to bed and wake up at consistent times.
- Avoid screens before bedtime to improve sleep quality.
2. Eat for Seasonal Balance
- Enjoy autumn foods like saury, mushrooms, and sweet potatoes.
- Focus on nutrients like B vitamins, iron, and omega-3s.
3. Stay Active with Light Exercise
- Morning stretches or short walks help.
- Sunlight boosts serotonin production.
4. Care for Your Mental Health
- Remind yourself: “This sluggishness isn’t my fault.”
- If feelings persist, don’t hesitate to seek professional support.
Conclusion: Stay Healthy as Autumn Begins
September sickness is not laziness—it’s a sign your body and mind are struggling to adjust.
By understanding its causes and practicing small daily habits, you can ease the transition and enjoy the richness of autumn more fully.
🍂 With the right approach, this fall can be one of energy, appetite, and renewal.
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