I think just treating it as a bruise is the best thing to do (as thats what it essentially is). From Wikipedia:
<div class="quote_poster">Quote:</div><div class="quote_post">Love-bites usually occur during acts of intimacy and take anywhere from one to five days to fade entirely, depending on the severity of the 'bite'. Various ways have been suggested for making the love-bite fade faster. This may be desirable in cases where one doesn't want other people to know that he or she has been intimate with another person. Some suggest applying ice immediately after the mark is made to stop it from worsening. It is also suggested, once the bleeding has stopped, to stimulate circulation through numerous means, such as rubbing the area or exposing it to luke-warm water. These methods need to be applied several times in order to have a visible effect. Other methods for curing hickeys include awkward procedures such as the application of peanut butter, mayonaise, oil, or tomato sauce to the affected area. Some of these methods may completely remove the bites in a short time, but one should apply such methods gently so as to not cause further irritation to the area.
A common herbal remedy for love bites is the mountain plant Arnica, found in gel form at natural food stores.
Many violinists are said to have hickeys, due to the irritation caused by the chin rest while playing for prolonged times.</div>