I don't know how it is normal for pinkness/purpleness to last in the skin 2 years and still be present, but at this rate, I predict it will be atleast 2 more years until I feel I don't really notice them and maybe 5 years max. 5 years though... 5 more years I mean... fml... I just hope they do keep fading to a point where I don't notice them anymore... I mean you never see adults with any red marks really... this stuff always fades right? lol
Find a small thin piece of clear glass or plastic (no sharp edges of course) and press it down over the mark with moderate pressure.
Whatever turns white is PIE, whatever does not turn white is PIH.
The whiteness is called blanching and that's how some doctors find out the difference.