text: how long does the calcium in your nails take to go away you know the white marks? a box fell on my thumb and theres white on my nails from calcium break up or w/e how long til that disapears ? lol! you mean to tell me there is really a scientific answer for those white marks?  my mom used to tell me that they represented how many boyfriends/girlfriends a person had! never really believed it,but hey...it came in handy to answer this question.