EXCLUSIVE

4:00 PM PT -- We just Shaun's mug shot ... he's got a BLACK EYE.

Olympic gold medalist Shaun White was arrested several hours ago after allegedly getting wasted at a hotel and badly injuring himself ... sources tell TMZ.

Sources tell TMZ ... White was in a Nashville hotel when he allegedly trashed his room in a stupor. When he was confronted by hotel staff, Shaun allegedly pulled several fire alarms and then ran fast ... so fast he fell and split his head open.

Law enforcement tells us Shaun was arrested for public intoxication and vandalism, but was taken to a hospital for treatment first. Once he's treated he'll be taken to jail.