Burn marks from whoop 5.0

It’s my 8th day wearing the Whoop 5.0 and I got harsh burn marks on both wrists

i have worn watches on both hands for last few years, and i never had something like this. First few days i was wearing on the right wrist, then it showed up then I thought it might be something from my end but now only 3-4 days in the left wrist and its on this wrist as well.

Left wrist -

right wrist (been 3 days + i have noticed) -

I don’t really have any skin-related issues