Dimensional Properties of a Wormhole?

I've been having some trouble understanding how a wormhole can be interpreted in multiple dimensions. I know a wormhole is a theoretic hole that basically connects two parts of bent timespace, but i don't seem to be able to figure out it's extra dimensional properties. I've read that a wormhole can be thought of as a tunnel through a fourth spacial dimension outside of the three spacial dimensions we experience, and outside of time( which coincidentally allows for time travel). But then wouldn't a wormhole simply connect a single point to it's self on a different spot in that points direct timeline since all the dimensions other than the three spacial dimensions interact with time? Correct me if I'm wrong or am missing something obvious.