Love-bite

Love-bites (or hickeys) are a temporary mark or bruise on one's skin resulting from forceful kissing or sucking by another.

Normally love-bites are associated with the neck, however it is entirely possible to develop a love-bite on almost any part of the skin.

As long as love-bites only lightly bruise, rather than breaking the skin they are largely harmless, from a medical point of view.