Introduction
Fibromyalgia is a complex and often misunderstood condition, and one of its most confusing aspects is the constant fluctuation of pain. Some days, you can manage your tasks without too much difficulty. The next day, the pain can become so intense that getting out of bed seems impossible.
Why these variations? What are the most frequent triggers? And above all, how can we better anticipate flare-ups to reduce their intensity?
This article aims to provide clear answers, based on current knowledge of fibromyalgia, while offering concrete tools for better daily living.
1. Why does pain vary in fibromyalgia?
1.1. Hypersensitization of the nervous system
Fibromyalgia is linked to a phenomenon called central sensitization :
➡ The brain amplifies pain signals
➡ The tolerance threshold is lower
➡ The nervous system remains in a state of hypervigilance
This mechanism explains why:
Even a little pressure can become painful.
A simple activity can be exhausting
A strong emotion can trigger a flare-up
1.2. The role of neurotransmitters
People with fibromyalgia often have an imbalance in:
✔ Serotonin
✔ Dopamine
✔ Glutamate
These neurotransmitters play a key role in pain management, mood, and sleep.
When their levels fluctuate, so does the pain.
1.3. The muscles remain under constant tension
Even at rest, fibromyalgia muscles can:
Contracted
Tired
Inflamed
Touch-sensitive
It is this constant tension that contributes to the variations in pain.
2. The main triggers of fibromyalgia flare-ups
2.1. Weather changes
A large number of patients report an increase in symptoms when:
Atmospheric pressure varies
Humidity increases
The cold weather is setting in.
A storm is approaching
The fibro body is very sensitive to these transitions.
2.2. Emotional stress
Stress is one of the most powerful triggers because:
It increases muscle tension
It activates inflammation
It disrupts sleep
It disrupts hormones
Even “positive” stress (travel, family event) can tire the nervous system.
2.3. Lack of sleep
Non-restorative sleep increases:
✔ Sensitivity to pain
✔ Fatigue
✔ Brain fog (fibro fog)
✔ Muscle tension
It’s a vicious cycle: pain prevents sleep, and lack of sleep increases the pain.
2.4. Physical overloads
Fibromyalgia does not tolerate:
Excessive effort
Repetitive movements
Intensive cleaning
The long walks
Unsuitable sports activities
Even if you feel good, exceeding your limits can cause a surge lasting 24 to 72 hours.
2.5. The inflammatory diet
Certain foods worsen the pain:
❌ Sugar
❌ Gluten (in some people)
❌ Ultra-processed foods
❌ Additives
❌ Fast food
Conversely, an anti-inflammatory diet can improve stable phases.
3. How to anticipate and reduce the intensity of flare-ups
3.1. Pacing: the most effective method
Pacing involves:
✔ Breaking up activities
✔ Alternating action and rest
✔ Avoiding days at “100% energy”
✔ Listening to your body’s signals
It is a simple strategy to implement and extremely beneficial for stabilizing symptoms.
3.2. Keep a log of triggers
Note down each day:
Pain level
Activities done
Food
Sleep
Stress
Weather conditions
Patterns emerge within a few weeks.
This helps to anticipate high-risk days .
3.3. Favor gentle movement
Regular movement (even very light) reduces strain:
Stretching
Yoga Nidra
Slow walk
Gentle swimming
Complete rest often worsens the symptoms.
3.4. Protecting your emotional health
The hypersensitivity of the nervous system makes emotions even more intense.
To reduce the impact:
Guided Meditation
Heart coherence
Circle of support
Adapted psychotherapy
Even 5 minutes a day can help calm the nervous system.
3.5. Adapting one’s environment
Soft light
Comfortable shoes
Orthopedic pillow
Hot/cold as needed
Avoid harsh noises
Small adjustments can reduce sensory overload.
Conclusion
The variations in pain associated with fibromyalgia are not a mystery: they result from a complex interplay of neurological, hormonal, emotional, environmental, and muscular factors.
Understanding these triggers not only helps to better anticipate flare-ups but also to gradually regain control of daily life.
Living with fibromyalgia remains a challenge, but with adapted strategies, a better understanding of one’s body and a balanced rhythm, it is possible to soften the difficult days and fully enjoy the lighter ones.
🔗 References
Mayo Clinic – Fibromyalgia
Johns Hopkins Medicine
Arthritis Foundation
European League Against Rheumatism (EULAR)
