Is it bad to keep over laping hickeys ?

I have a boyfriend he gave me a hickeyy then he did it on the same spot a few more timess . will that cause anything serious ?

probably not but if your worried just tell him to pick a new spot :]

It isn't good because a hickey is when someone sucks on your skin and what they are doing is sucking the blood up to your skin and if you keep doing that in the same spot you can pop your skin vesle!!!

A hickey is nothing more than a bruise brought about by a pressure differential (his sucking). It is ruptured capillaries.
It won't hurt you. But it isn't a mature look.

hickeys are trashy tell him to suck something else..

That is very immature. They don't feel good and make you look trashy.