MAD MEL is so clearly out of control, and his condition appears to be so severe, he needs to be hospitalized, his family fears!

Mel Gibson‘s devastated family is begging the troubled actor to check into a mental health facility to get help for his bipolar disorder!

The Mad Max star’s family and friends have urged him to seek inpatient treatment for his psychiatric issues and substance abuse, which they believe may have triggered the alleged attacks on ex-lover Oksana Grigorieva.

The ENQUIRER has also uncovered the stunning secret behind Gibson’s shocking rage!

 "It’s a desperate time for Mel, and admitting himself to a center for treatment is what his family thinks he has to do," a longtime family friend told The ENQUIRER.

"I don’t think Mel has ever really been properly treated for his manic depression."

FOR THE FULL STORY with all the details you won’t find anywhere else pick up the new ENQUIRER – on sale NOW!