Help!! Toddler won't leave scab alone

[3103Ab]

I am in quite a desperate situation with my 2.5 year old. He has had a scab on his nose for MONTHS and it won't heal because he picks at it constantly.

His fingernails are chopped really short, I don't even know how he's still managing to do it.

Any cream we put on he wipes off instantly.

Please does anyone have any advice??

A very sticky hard to remove plaster on it?

What did you do in the end @3103Ab ? Going through the same right now!!!