A cut i cannot see

There's a cut I cannot see
it stings and burns,
but does not bleed
it hides from sight of eye
it's there, I know,
but cannot see
impossible to notice
unable to ignore
I pull and pick and prod the skin
and now it finally bleeds
the cut is long,
but slender still
it aches and screams and cries
for my attention which it holds
the cut it pulses
the cut it bleeds
the bleeding never stops
once it scabs I pick and prod
and pull it once again
it starts to bleed
just like before,
but flows more freely now
(the pain is not as great
I've found a way to feel numb
just think of the beauty
of the blood flowing freely
and the pain will fade away)

ok the part in parenthesis im not sure to leave it or not, so tell me what you think.