Depends on skin type
It really depends on your skin type in terms of color. Fair-skinned redheads, for example may stay red and inflammed looking for months.
Darker skinned inividuals will lay down a great deal of pigment
that can remain forever. All of these can be treated with good combination therapy: skin creams, chemical peels, lasers, microneedling and other treatments can do wonders. See a good plastic surgeon.