BÌDEAG AN DUINE MHAIRBH, VI 165, the dead man’s nip. I heard of a woman who was married to a widower who was nipped very severely on the night of her marriage. She thought it was the first wife. It is attributed to jealousy in some cases.
Màiri Thormoid MacInnes in Eriskay told me, “Oh, that was very common, the dead man’s nip. If they had a spot on them, and it was black, they’d say it was the dead man’s nip. And my mother would say, oh, were you thinking of someone dead, and they came and pinched you?”