When I started grooming, my skin was in such bad condition it would bleed very easily.
My technique was awful and I would hurt myself daily.
Some places on my face would bleed after only a few grooming strokes every time I worked there.
One spot in particular, in the mustache area, was so folded that it bled, anytime I groomed it, for over three years.
But gradually, the bleeding reduced, then stopped.
My skin became more and more flexible and it could take more and more pressure from my nails.
Now, I hardly bleed anymore.
I can put all the strength I want and groom for long periods at the same place, but my skin just seems to appreciate.