I can't get my 2.5 year old to stop picking a scab on her face, it's been 5 months

My daughter has a scab on her face that she "comfort picks" when she is bored, in the car, sleepy, or falling asleep. I asked our health nurse and she suggested scratch mittens or long socks up her arms. I tried those and she can get them off and I can't put them on her during the day.I've tried:- cute bandaids- regular bandaids- duct tape- scolding when she does it- praising when she leaves it (just draws her attention back to it)It has been almost healed twice now, then she gets at and opens it again.Any ideas at all?​ via /r/Parenting https://ift.tt/2Pv6m8E