Hi minna5, Im not 100% sure, but from.what I'm looked up it has to do with the raised bit under the watch. Either from the heart rate monitor, and or the cordless charging bit.  I had the horrendous pain for so long, so I started waring over the cuff of my long sleeve work shirt. That has helped, and I can now ware when not waring my long sleeve shirts. But they will.be a slight back by end of day. I decided to try and put up it and work out how combat it, was even thinking a bandana under it, just because of the price of it I wasn't going to give up... as I'm not sure we can get money back🤷‍♀️ Hope any of it helps.   ... View more

Yes I totally agree, and I'm not even sure if I can return it? My pain lasted for week later. Have not worn the watch now for 4 weeks as I'm on time off from work, but when I return I will try again, thinking of putting something under the watch to see if that helps.  I love the watch and need it for work.  But if pain keeps up, i don't know what to do. ... View more

I've had my watch now 5 days and second day the pain started, it is defernatly the watch sensors. I have watched a video on YouTube about the possion on the arm/wrist So I'm giving that a go.  Love the watch and concept but the pain have been extremely bad, to the point over the weekend I couldn't use my left hand. ... View more