I would like to add to the disscusion where Alan Rockoff, MD - dermatology, replied.
I am a 52 and have had reacuring blood blisters on the labia major since the first one in 2003.
Recently I noticed that I now have several of these blood blisters on the labia major and was alarmed.
Today I went to my GP and he took biopsys of these blood blisters.
I am awaiting the results but he feels they are connected to the veins/capilaries.
He told me he feels this is Hemangioma