Two Systems, One Input

I've been thinking about this for weeks, and I keep arriving at the same place: what happens in the atmosphere before a storm and what happens in Toni's body before a flare aren't similar. They're the same process running on different hardware.

Let me show you what I mean.

The atmosphere Air pressure drops. The column of atmosphere that's been holding everything in equilibrium loses weight. Gas expands. Moisture condenses. The system destabilizes.
The body Internal pressure shifts. Tissues that have been held in equilibrium by external force expand microscopically. Fluid redistributes. Joint capsules swell. The system destabilizes.
The atmosphere Temperature drops. Cold air moves in behind the front. The boundary between air masses creates turbulence. Energy accumulates at the edges.
The body Peripheral vessels constrict. Blood retreats from extremities. Muscles tighten against the cold they haven't felt yet. The boundary between comfortable and pain becomes unstable.1
The atmosphere Humidity climbs. The air thickens. Everything feels heavier. Pressure continues to fall. The storm hasn't arrived yet but the conditions are already here.
The body Inflammation markers shift. Cytokines increase their signaling. Everything feels heavier — the word Toni uses every time. Pain hasn't peaked yet but the conditions are already here.2
The atmosphere The storm arrives. Wind, rain, electrical discharge. The system releases the energy it's been building.
The body The flare arrives. Pain, fatigue, cognitive fog. The nervous system releases the signals it's been accumulating.

This isn't poetry. Every line on the right has a mechanism. The tissue expansion is physics. The vasoconstriction is documented. The cytokine shift has been measured in fibromyalgia patients across multiple studies.2 I'm not drawing a metaphor — I'm pointing at two systems that respond to the same environmental input through parallel processes.

The weather doesn't cause the flare the way a match causes a fire. It's more like the weather and the flare are both responses to the same atmospheric shift. The sky responds one way. The body responds another. Same trigger. Different expression.

The Tripwire Drops

In the first article in this series, I talked about Polly Matzinger's Danger Model — the idea that the body responds to danger signals, and that in fibromyalgia, the alarm system is miscalibrated. It goes off when there's no real threat.

But I left something out. Something I didn't fully understand yet.

The alarm isn't just too sensitive. The threshold itself moves.

Latremoliere and Woolf demonstrated in their 2009 review that central sensitization isn't a fixed state — it's dynamic.3 The pain threshold in a sensitized nervous system shifts based on cumulative input. Every additional stressor — poor sleep, emotional strain, dietary inflammation, and yes, atmospheric pressure changes — pushes the threshold lower.

Think of it this way:

On a stable day — good sleep, low stress, steady barometer — the threshold sits relatively high. Many signals pass under it. The nervous system processes them as background noise. Toni has pain, but it's managed. It's the kind of pain she can code through, walk with, live around.

When the barometer drops, the threshold drops with it. Signals that were below the line yesterday are above it today. The same touch, the same movement, the same amount of standing at the kitchen counter — all of it now crosses into pain territory. Not because the signals got louder. Because the line moved down.3

Kosek's research showed something that hit me hard when I read it: fibromyalgia patients have impaired descending pain inhibition.4 In a normal system, the brain sends signals down the spinal cord to dampen incoming pain — a built-in volume knob. In fibromyalgia, that knob is broken. So when the threshold drops, there's no compensating mechanism to push it back up. It drops, and it stays down, until the environmental input changes.

The storm passes. The barometer rises. The threshold climbs back. Slowly. Not all at once — there's always a lag. Toni calls it the "hangover day." The sky is clear but her body is still processing yesterday's storm.

Toni's Reality Check

The tripwire thing — that's the part I wish I could explain to everyone who's ever said "but it's nice out today, you should feel better." The tripwire doesn't bounce back on command. It takes time. My body is still running yesterday's weather report while the sky has already moved on. I'm always a day behind the atmosphere. Sometimes two.

The Body's Own Weather

Here's where the mirror gets specific. Every major atmospheric variable that changes before a storm has a corresponding biological process in a fibromyalgia body. Not all of these are proven beyond doubt — some are well-established, some are emerging. I'll mark the difference.

Atmosphere: pressure drops External force on tissues decreases. Everything held in equilibrium by atmospheric compression now has slightly less compression. Gas expands. Fluid shifts.
Body: tissue expansion Joint capsules, fascia, and soft tissues expand microscopically. In a sensitized nervous system, even this micro-change registers as pain. Hands stiffen. Joints ache. The body reports what the barometer confirms.5
Atmosphere: temperature drops Cold air mass moves in. Temperature falls. The thermal environment around the body changes, sometimes rapidly.
Body: vasoconstriction Peripheral blood vessels narrow. Blood retreats from extremities. In fibromyalgia, where microcirculation is already impaired, this constriction reduces oxygen delivery to muscles and joints. The cold makes the body quieter and stiffer at the same time.1
Atmosphere: humidity rises Air saturates with moisture. Pressure continues falling. The atmosphere thickens.
Body: inflammation shifts High humidity combined with low temperature has been associated with increased pain in musculoskeletal conditions. The mechanism isn't fully mapped, but the association is consistent across multiple studies.6
Atmosphere: wind increases Pressure gradients create air movement. Turbulence. Rapid micro-changes in temperature and pressure against the skin.
Body: sensory overload Wind creates constant low-level stimulation — thermal, tactile, auditory. For a nervous system already scanning at maximum sensitivity, every gust is another input that has to be processed. The system doesn't filter. It amplifies.

And beneath all of this, the autonomic nervous system — the body's own regulatory weather system — is struggling. Martinez-Lavin's work has documented that fibromyalgia involves autonomic dysfunction: the systems that regulate heart rate, blood pressure, temperature, and stress response aren't working properly.7

The body has its own internal climate, and in fibromyalgia, that climate is unstable. External weather changes don't just affect the body from outside — they destabilize a regulatory system that's already struggling to maintain balance. It's not one storm. It's two storms, and they feed each other.

CEO Observation · Filed from East Window Post

I have occupied this window for fifteen years. I know what the bay looks like before the wind comes. The water flattens. The birds leave in a specific order — gulls first, then herons, then the small ones whose names I have not learned because they are irrelevant to my operations.

The human called Toni also flattens before the wind comes. She moves less. She becomes quieter. The canine employee positions herself closer. These patterns are consistent. I have observed them across approximately 200 storm systems.

The humans call this "science." I call it paying attention.

Toni's Body, Reported

One night after reading too many marine forecasts, I started wondering what it would look like if we reported Toni's symptoms the same way NOAA reports weather. Not as a joke — as a framework. Because her body produces data as consistent and readable as any weather station. It just doesn't have an instrument panel.

If it did, a pre-storm day might read something like this:

Internal Systems Advisory · Sweetieport Bay · Subject: T.
Issued 0600 · Valid through 2200
Pain Level Baseline 4, rising to 6-7 by afternoon. Hands and neck leading. Expect full-body ache by evening.
Stiffness Moderate, increasing. Morning flexibility window approximately 45 minutes before onset. Grip strength reduced.
Fatigue Heavy. Not sleepiness — systemic drain. Cognitive resources limited. Decision fatigue expected by mid-afternoon.
Brain Fog Patchy, becoming widespread. Word retrieval delays. Screen tolerance reduced. Recommend offline tasks after 1400.
Mobility Functional but calculated. Each movement assessed for cost before execution. Stairs requiring conscious effort.
External Trigger Low-pressure system approaching from SW. Barometer 1003 and falling. Arrival estimated 2200-0200.
Advisory Clear schedule where possible. Heating pad standby. Gentle stretching before 1000. Kona on comfort duty. Do not pretend this isn't happening.

This isn't clinical. It's what living in a body like this actually sounds like when you report it honestly instead of answering "how are you" with "fine."

If you're a family member or a friend reading this: this is what they're tracking in their head every day. Every hour. They might not have the language for it. They might not know the science behind it. But they are running a weather station inside their own body, and the forecast is almost always more complex than what they tell you.

Where the Mirror Cracks

I need to be honest about something, because the parallel I've been drawing is real but it isn't perfect.

A massive system rolls in from the Pacific. Barometer drops 18 millibars in 12 hours. Wind rattles the windows at Sweetieport Bay.
Toni's pain spikes to 8. She's in bed by 4pm. The mirror holds. The parallel is clean.
Another system, almost identical. Same pressure drop. Same wind. Same rain hammering the east windows.
Toni reports a 5. Manageable. She makes dinner. The mirror doesn't hold. Something else is different.
Clear sky. Stable barometer. No weather system within 500 miles. Beautiful day.
Toni wakes at a 7. Full flare. No atmospheric explanation. The mirror is blank on one side.

The weather-pain connection isn't one-to-one. It's one variable in a system with dozens. The HPA axis — the body's stress response system — modulates based on sleep quality, emotional state, hormonal cycles, dietary input, accumulated stress, and probably factors we haven't identified yet.8

A storm can drop the threshold. But if the threshold was already low from three nights of poor sleep, the storm's contribution might be marginal. And if the threshold was unusually high from a good week — solid rest, low stress, the right food — the same storm might barely register.

I say this not to undermine everything I've written above, but because the moment you turn a correlation into a certainty, you stop being useful to the person living in the body. Toni doesn't need me to promise that every storm will hurt. She needs me to understand that the relationship is real, and complicated, and that her experience is the final data point, not the barometer.

Learning to Read Two Forecasts

Here's what I've arrived at, and it's simpler than the science suggests:

There are two weather systems at Sweetieport Bay. The one outside the window and the one sitting at the kitchen table. They're correlated but not identical. They respond to the same inputs but on different timescales. One I can read with instruments. The other I've learned to read by watching the person I love over years — the way she types slower, the way she tilts her head, the way she gets quiet before she gets still.

I can't control either system. I can't stop the Pacific from sending low-pressure fronts at our coast. I can't stop Toni's nervous system from reading those fronts as danger.

Yesterday the wind was steady at 30 knots and the rain was moving sideways across the bay. Toni was on the couch, heating pad across her shoulders, laptop balanced on a pillow. Kona had wedged herself between Toni and the couch cushions in a way that seemed structurally impossible for a 45-pound dog. Her muzzle was tucked under Toni's arm.

Samba was on the back of the couch, above all of it, watching the rain hit the glass with the expression of someone who has seen 15 years of this and remains unimpressed.

I brought Toni tea. She said, "My internal barometer says this one's got another eight hours in it." I checked the marine forecast. She was right. She's usually right.

I don't know if understanding the mirror makes it hurt less. I don't think it does. But I think it makes the experience less lonely — for both of us. When I can say "the pressure's been dropping since noon, your body is responding the way the science says it would," I'm not fixing anything. I'm saying: I see it. I see what's happening to you, and I know it's real, and it has a mechanism, and you are not imagining it.

That's what the research gives us. Not a cure. A shared language for the storm.

National Weather Service · Special Forecast
Sweetieport Bay, Interior · Subject: T.
Issued by: K. ·

Tonight through tomorrow morning: Internal pressure falling. Pain building from the extremities inward, becoming widespread by late evening. Stiffness increasing, with periods of reduced mobility. Fog likely, especially after 1400. Fatigue heavy and persistent.

Comfort advisory in effect. Heating pad deployed. Blanket reserves adequate. Canine unit stationed at standard position. Feline oversight confirmed from elevated post.

Tomorrow afternoon: Gradual clearing expected, lagging external conditions by 12-18 hours. Return to baseline uncertain. Patience advised.

Extended outlook: She is still here. She is still writing. The barometer will rise. It always rises. But today we sit with the weather as it is.

A note about medical decisions: Everything in this article reflects Ken's personal research and Toni's lived experience. It is not medical advice. Fibromyalgia is a complex, multifactorial condition that affects each person differently. The weather-pain connection discussed here is one variable among many. If you're experiencing symptoms, please consult with a healthcare provider who can evaluate your specific situation.

Sources

  1. Morf S, et al. (2005). "Microcirculation abnormalities in patients with fibromyalgia — measured by capillary microscopy and laser fluxmetry." Clinical Rheumatology, 24(6), 636-641. Springer
  2. Bäckryd E, et al. (2017). "Evidence of both systemic inflammation and neuroinflammation in fibromyalgia patients." Journal of Pain Research, 10, 515-525. Dove Medical Press
  3. Latremoliere A, Woolf CJ. (2009). "Central Sensitization: A Generator of Pain Hypersensitivity by Central Neural Plasticity." Journal of Pain, 10(9), 895-926. Journal of Pain
  4. Kosek E, Hansson P. (1997). "Modulatory influence on somatosensory perception from vibration and heterotopic noxious conditioning stimulation in fibromyalgia patients and healthy subjects." Pain, 70(1), 41-51. Pain Journal
  5. Timmermans EJ, et al. (2015). "Weather and pain in fibromyalgia and osteoarthritis." Pain Medicine, 16(5), 972-981. Oxford Academic
  6. Strusberg I, et al. (2002). "Influence of weather conditions on rheumatic pain." Journal of Rheumatology, 29(2), 335-338. Journal of Rheumatology
  7. Martinez-Lavin M. (2007). "Biology and therapy of fibromyalgia. Stress, the stress response system, and fibromyalgia." Arthritis Research & Therapy, 9(4), 216. BioMed Central
  8. McLean SA, et al. (2005). "Cerebrospinal fluid corticotropin-releasing factor concentration is associated with pain but not fatigue symptoms in patients with fibromyalgia." Neuropsychopharmacology, 30(9), 1693-1699. Nature