This is neither the right language, nor the right subject for my blog. I am writing this in English in case anyone does what I did and googles a possible connection between Fitbit Flex (an electronic activity tracker) and headaches. I couldn't find anything, apparently it's just me, so you better take this with a pinch of salt.

I bought a Fitbit Flex in November and wore it around my wrist 24/7, only taking it off for charging for about one to two hours every four or five days.

At the end of January, I started developing severe toothaches that would then progress to ear aches and pain in the temple on one side of my face. The first time these occurred, I went to see my dentist, but he insisted that there was nothing wrong with my teeth. When the pain persisted, I went back, but frankly I couldn't even point out to him which tooth it was as all of them were sore. There still wasn't anything wrong with my teeth.

In the beginning, the pain came in episodes of 30 to 45 minutes, two or three times daily. I started carrying painkillers everywhere. Since it didn't come from my teeth, I went to see my GP who referred me to a neurologist who ordered an MRI scan of my brain.

In the meantime, the episodes became shorter (about 10 - 15 minutes) but more frequent, three to five times a day. Painkillers became pointless because by the time they'd have kicked in, the pain would have passed anyway.

There was just over a week between the MRI and the follow-up appointment with the neurologist. During that week, I felt worse and worse and eventually, on a Saturday, the headaches were so frequent that I could use painkillers again: They might not do anything about the current attack, but probably the next.

On Sunday, I had my first headache at 8 am, took painkillers, got the next one at 10:15 and then every 30 minutes for about 5 minutes. The tablets didn't seem to work anymore. My next appointment with the neurologist was two days away and at that point I wasn't sure how I would get through those two days. And then what would he say? What was wrong with me?

That Sunday afternoon, I took my Fitbit off for charging at about 2:30 pm. I haven't had another headache since. Of course I told the neurologist about it, but he dismissed my suspicion (but suggested that I should stop wearing it anyway). The MRI was inconclusive (ie: nothing wrong with my brain). His diagnosis is trigeminal neuralgia (even though my symptoms don't fit). I have now been pain-free for more than a week. It didn't subside slowly, it didn't become less severe or less frequent. No, it just vanished completely as soon as I took that thing off and never came back. The longer I am without headaches - after a solid four weeks of several attacks daily! -, the more I am convinced that it had something to do with it.

But is it just me? Am I the only person on the planet who is sensitive to an electronic activity tracker? Why else is there nothing on the internet? I could only make the connection when my headache episodes came so fast that I noticed them not coming when my Fitbit was charging. Maybe others don't have that same frequency?

There is no evidence that a gadget caused my pain. The doctor has diagnosed something else. But I can't help wondering ...


Two months on: My headaches never returned. Not even a little twinge. Nothing.