Is there a single word for unhealthy ego?

This article actually explains my question http://stonepsychology.com/is-your-ego-healthy-or-unhealthy-heres-how-to-tell/ very well.

If we say some action is driven by 'ego' we often mean that the action is driven by excessive pride and coming from a place of unhealthy ego.

Is there any easier way that we can identify behaviours or actions as being driven by an unhealthy ego? Is there a single word for 'unhealthy ego'?

Hubris

From Merriam-Webster:

exaggerated pride or self-confidence

Hubris pretty much always has a negative connotation, unlike ego, which may be neutral, from its origins in ancient Greek.