Is it just TENS or a combined device with EMS functionality too?
‘…TENS and EMS units use electrical currents. TENS devices may treat pain , while EMS devices may stimulate and strengthen your muscles…’
Either way, from what I’ve experienced of using both, it’s going to get your muscles twitching. And it’s not going to harm you try it, it might be just enough to disrupt the pins and needles the same way it does for pain.
Start off on the lowest setting you can feel and build it up from there. Start off for say 15/20 mins, see how you feel, maybe take a break for an hour then try it again.