If she was injured at work surely her hands would have been greasy, and even if the hospital had cleaned her up they surely would not have painted her nails bright red! They would probably have been chipped too.
Watch Django Unchained, and see every single slave has perfect finger and toe nails and hands and feet unblemished by anything approaching a day or two out in the fields.
Similarly any down-and-out character usually has clean hands and nice nails - it's just something we have to gloss over as viewers.
My sister in law managed to renovate her old farm house more or less single handed including demolishing walls and also tackle rebuilding the garden walls. She always looked perfect and beautiful as did her hands and nails. I could never work it out!
I was surprised to see her painted nails and makeup on after her operation as I thought you had to remove these before going down to theatre, but even more surprising was the morphine in the open medicine cabinet that she was able to take. Yes, I know it's a soap, but to me, it makes the programme laughable.