Physical ones are easier to see.
Even the ones under the skin.
Internal injuries still cause pain.
Mental injuries are just as devastating.
More so since people brush them off
as nothing more than the persons laziness.
The brain is an internal organ
which can be hurt.
So maybe we should equate mental health
with the brain injury which caused it?
We are physical creatures
and our brain is the most spectacular piece ever seen.
Saturn's Premier Poet 