[Touya]

Originally Posted by NanteNa

Actually, a hickey is the blood being ''sucked'' out to right under the skind. A little like when you get a black eye. Except that hickeys are very unhealthy for the skin and blood circulation.

I've bitten a hickey onto someone before. In technical sense its the blood rushing to the surface like a bruising effect. You can get the effect technically anyway that pulls blood to the surface.