My mother is 61 yrs old: History of COPD and Diabetes. Had triple bipass and crodit artery surgery last MAy. Now she has on both hands below thumb . a black bruise like mark that is raised and very painful. To me it looks like it has a white center. I thought it looked to be puss.CBC on Monday says he white cell count is., so she is still within range. The right hand looks like therei is ared mark that follows the vein halway now to the elbow?????