1754 (Moravian Church) ii. 348/2 Where that Spectre the Blood-mark Sees on any Forehead, Here must (thinks he) my Trade dark, Souls t'eject, be spared.
1899 T. C. Allbutt et al. VIII. 866 When the sucker [sc. of the louse] is taken out a tiny blood mark appears on the surface [of the human skin].
1997 (Nexis) 27 Mar. 28 Two small blood marks stained the ground near a brass bullet or shell casing.