my 6 month old has a faint, widespread barely noticeable bruising coloration covering roughly 2/3 of her upper to lower back region. We did not notice it until we layed her across my legs and the light allowed it to be noticeable. What could this be?
Hi...by what you quote I feel it could be a Mongolian spot which is a physiological finding and will get better by itself. But.... Skin conditions are best diagnosed only after seeing directly. I suggest you to upload photographs of the same on this website, so that I can guide you scientifically. Hope my answer was helpful for you.  I am happy to help any time. Further clarifications and consultations on Chat Doctor are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health.