A birthmark, perh spec a port-wine stain.
1908 U.S. War Dept. Annual Rept. for 1907 7.356, The president of the town attributes their bad luck to the “Evil Eye” of a German scientist who accompanied Commissioner Worcester. This gentleman, who had a birth scald or mark over one eye, had a camera focused as is sighted a rifle. 1939 FWP Guide Tennessee 136, She maybe goes to town and sees a scary movie show. Then what? The baby’s born with a birth-scald on his face.