I've had and worn my vivofit for 5 years... And in the last 6 months I've started having the red/burn mark looking rash.
At first I thought soap or something under it... Or gardening dirt.
I have been turning it daily - one day wearing normally and the next day rotating it and wearing it backwards on the inside of my wrist.
Now I'm getting the rash both inside and outside my wrist. I think this might be the end of my run with a step tracker.