reviewed against NHS and Mayo Clinic guidance · last updated 7 september 2026
rox is a free ios app for tracking chronic illness. it remembers every symptom, reads your apple watch, oura, garmin or amazfit, works out what your flares have in common, and turns months of logs into a summary a doctor can read in a minute.
what fibromyalgia feels like day to day
The defining feature is widespread pain: pain on both sides of your body, above and below the waist, lasting three months or longer. It moves around, it changes character, and it rarely stays in one place long enough to point at.
Fatigue is the second half of it, and it isn’t ordinary tiredness. You can sleep for nine hours and wake up feeling like you never went to bed, because fibromyalgia disrupts the deep stages of sleep that actually restore you.
Then there’s fibro fog: losing words mid sentence, rereading the same paragraph, forgetting why you walked into a room. It tends to track closely with how badly you slept and how much pain you’re in, which is one of the clearest patterns tracking tends to reveal.
fibromyalgia flare-ups
A fibromyalgia flare is a temporary period when your symptoms get noticeably worse than your usual baseline, then settle back down again. Pain spreads or intensifies, fatigue deepens, sleep gets worse and the fog thickens.
how long does a fibromyalgia flare last
There’s no fixed answer, which is frustrating to hear when you’re in one. Flares can last a couple of days, a couple of weeks, or occasionally longer. Most people settle into a personal range once they’ve been through enough of them.
Your own average is the number that actually helps. If you know your flares typically run five to seven days, day three feels survivable instead of endless, and you can plan around it. That number only exists if you write the start and end dates down.
what causes fibromyalgia flare ups
The triggers people report most often are poor or broken sleep, physical overexertion, emotional stress, infections, weather and pressure changes, hormonal shifts, and travel or disrupted routine.
Be careful with the word trigger, though. Plenty of things that look like triggers are early symptoms of a flare that had already started. Sleeping badly on Monday might have caused Wednesday’s flare, or it might have been the first sign of it. Only repetition across weeks tells you which.
what helps during a fibromyalgia flare
Pacing is the one that comes up most: cutting activity before you hit the wall rather than after, and spreading what you have to do across the day. Gentle movement, heat, protecting your sleep and dropping non-essential commitments all come up repeatedly in what people find useful.
What helps is genuinely individual, and some of it will be medication your prescriber has already discussed with you. Tracking what you tried and whether it worked is how you build your own list instead of borrowing someone else’s.
treatments approved for fibromyalgia
Three medicines are approved by the FDA specifically for fibromyalgia: pregabalin (Lyrica), duloxetine (Cymbalta) and milnacipran (Savella). Others, including amitriptyline, are widely used off label. Which one suits you, at what dose, is a conversation with a prescriber rather than something to work out alone.
Non-drug approaches carry real evidence too. Graded, gentle exercise has the strongest support of any single intervention, alongside cognitive behavioural therapy and work on sleep. None of them are quick, and all of them work better when you can show what your baseline actually looked like before you started.
what to track if you have fibromyalgia
Pain level and where it is, because the location moves and that movement is diagnostic information. Fatigue separately from pain, since they don’t rise and fall together. Sleep quality rather than hours. Fog, rated honestly. What you did the day before, which is where post-exertional crashes hide. Then what you tried, with whether it helped.
Two to four weeks is usually enough to see something. You’re looking for the relationship between the columns rather than any single bad day: whether fog follows poor sleep, whether crashes follow the days you pushed, whether a flare has a run-up you could learn to spot.
what this looks like in rox
Everything above is a lot to keep on paper. Here is how the same tracking works in the app, including the doctor report it builds for you.
free tools for fibromyalgia
All free, no sign-up, and they work in your browser. The trackers save to your own device and the printables are made to be taken to an appointment.
01
how long can a fibromyalgia flare up last
Anywhere from a couple of days to several weeks. There’s no standard duration, and it varies between people and between flares. Logging the start and end of each one gives you a personal average, which is far more useful than a general range.
02
what causes fibromyalgia flare ups
Commonly reported triggers include broken sleep, overexertion, stress, infection, weather changes, hormonal shifts and disrupted routine. Some apparent triggers are actually the first symptoms of a flare already underway, so treat a pattern as real only once it repeats.
03
how do i know if it’s a flare or something new
A flare is your familiar symptoms getting worse for a while, then easing. New symptoms, symptoms that don’t settle, fever, weight loss, or anything focused in one specific area deserve a medical opinion rather than being filed under fibromyalgia.
04
what should i take to a fibromyalgia appointment
A few weeks of tracked days, your medication list with what you’ve already tried and stopped, and two or three specific questions. Concrete records shift the conversation from how you feel today to what has actually been happening.
05
can tracking change my treatment
It can change the conversation, which is usually what changes the treatment. Showing that fog follows poor sleep, or that crashes follow specific activity, gives a clinician something to act on that a description from memory doesn’t.
Rox is a tracking tool, not medical advice. It cannot diagnose or treat anything, and nothing here replaces a conversation with your own clinician.