Fenix 5x plus burning my wrist.

Nope - do you have all day spo2 on? Some people can be excessively sensitive to some frequencies...

It's unlikely to be a burn as there is nothing there to cause a burn. What is more likely is that it's a result of wearing the watch 24/7 for long periods of time without letting the skin underneath breath causing a build-up of bacteria and other grot that causes a rash to develop. 

thanks for that as all things could be possible,  but i wear it the same as the other 5 Garmin's i have owned and never had an issue. Also the Quatix were recalled for a battery burning wrist issue, due to the battery being to close to the housing. Garmin have told me they have 2 other cases of burning on the Fenix. 

You did not provide the most basic info to us like if the watch is hot and if you got massive battery drain?!

I once had a chinese smartwatch that got really hot when constantly transmitting data over GSM network - however the Fenix watch has nothing that power hungry that could normally cause a massive temperature rise - except there was something wrong with the assembly/soldering/battery.

Hi, I have the same issue and have only had the watch for a few months. I have had several Garmin watches in the past.

This is what I have found out. It is a chemical type burn on your wrist. It is from the battery charge point having an adverse affect on your skin. You need to ensure you wash your wrist and also the charging point all the time to make sure you skin is super clean underneath the watch. But a better option is to buy the charging point plug for the watch, that way it should stop the reaction to your wrist.

So yes, it is a chemical burn, as I had mine treated by a nurse to confirm.

Yeah the charging port may be the cause as it will be metal points and voltage plus a salt solution. Definitely try the plastic port plugs. I bought ten for a pound off Wish. 

No, really Noooo!

There is absolutely no voltage across any of the pins (which by the way makes totally sense)!

I just measured it to confirm it and there is NO voltage.

If you connect the watch to the PC it gets 5V fromt he USB bus and starts to activate the interface - not at any time before!

But, in the presence of a salt solution, as in sweat, just the presence of two difference metals may be enough. No need for voltage

I know I have had far less irritation since adding a port plug. If the pins have any nickel in them, it may be enough with long term exposure to trigger a sensitivity. My wife gets it just from metal strap buckles.

Not a definite, but for pennies to test out worth trying. At least, it would eradicate it as a possible source if the problem continues

The other possibility is a sensitivity to the resin used to cover the back of the watch. For it to 'burn' under the watch, sweat may definitely be a contributory factor. I know also a few people (my wife included) who have terrible trouble with skin irritation (even with frequent cleaning etc) with the silicone used for modern wrist straps. That didn't go away till we bought her a leather one.

There's definitely a sensitivity there, and looking at the back of the watch it's either

Sensitivity to the wavelength used for WoHR
Sensitivity to the materials used on the back
Sensitivity to the materials on the reson cover
Sesnsitivity to the metal in the charging pins

All in their own right equally unlikely in the general population, but given enough people - one person will have it. Sensitivities are weird things. I cannot eat pithy fruit without serious problems! (but then I'm a freak!)

So i think the charging port cover, foe pennies, is worth a try just to tick it off the list. Another thought would be to try and see if a plastic cover (even if temporarily made from a piece of clear soft plastic) under the watch removes the effect. That would eliminate the metal cover.

The photo-sensitivity would be rare, especialy given the power of the led, but *** someone enough with a needle enough times it'll hurt.

Needs a process of elimination for sure though! Thanks for the clarification on the USB ports though. I guessed it may be, but I don't have the fine motor skills to check those pins!

THOUGHT STRUCK ME

 (especially since mentioning the Quatix)... since the Fenix has an inbuilt temp sensor, find a watchface that can display it and monitor it - if this was a burn due to heat, that sensor would pick up the elevated temps. Again, process of elimination

I've had this happen before, but only when I don't shower within a few hours of working out.  I think what happens is the salt on your skin acts as sandpaper so your watch rubs a spot raw.  What I do to counteract this is just remove the watch in the shower, run it under the water (I'll use my thumb on the underside to make sure it's completely clean), then make sure to soap my wrist throughly so there's no salt/sweat left.