Kurt Warner: I Cracked My Jaw ... Took Elbow To The Face

Kurt Warner's jaw is ALL JACKED UP -- and it's all because the 44-year-old took an ELBOW TO THE FACE!!!

It's unclear exactly how or why Warner got bashed in the mouth -- but it looks incredibly painful judging by the pics he posted to social media.

Warner says his jaw is broken in multiple places -- and the hit was so jarring, it separated his teeth.