I get those marks also but only when inflammed/retaining water, which as I get older is most of the time. I first realized I retain water all over when I tried DMSO on a significant portion of my body (for PMS) and found it took down swelling ALL OVER (I mean that there WAS swelling to take down ALL OVER). I am allergic to all sorts of things and allergies will make me retain water and frankly make me drink tons to wash it out of my system. But I also wonder if water retention might have something to do with not getting enough magnesium, since the urea cycle requires magnesium. I don't know.