I have the worst skin it changes color i mean sometimes i look pale,,its just strang i easily get PIGMENTATION

i not very light %26amp; am not too tan but over all am light skin. i want to knwo how do i NOT get pigmentation i mean what type of vitamin can i take to avoid pigmentation ( BROWN MARKS) on my skin,, a small mosquito bite or jus a small razor cut can turn UGLY brown spot. plz dont say bleach %26amp; use alot of shaving cream i do all that!! i wana knw what else can i do to avoid %26amp; get that creamy skin tone/textur

I have the worst skin it changes color i mean sometimes i look pale,,its just strang i easily get PIGMENTATION
just eat fruits that contain vitamin A and check your sugar in the blood.