Steve-O is back in the hospital, he reveals on his blog.

"I've now been clean for 115 days, and I'm, again, in a mental institution," the Jackass star, 33, writes. "I did so much cocaine, ketamine, pcp, nitrous oxide, and all sorts of other drugs, that, quite simply, my brain is f----d up."

He adds that though his "cognitive skills are alright ... I frequently suffer from horrible mood swings and severe depression."

Steve-O (who was hospitalized at a mental health unit of L.A.'s Cedars-Sinai Medical Center in March) writes that the "medication that is prescribed to me doesn't do the trick every day. I'm back in the looney bin trying to get that s---t right.

"The bottom line is that doing drugs f----d my a-- up, and I'm going to be paying for it for a long time, probably for the rest of my life," he says. "Everyone's going to make their own decisions in life, but nobody needs to make the same mistakes I made."

Steve-O pleaded guilty to felony cocaine possession
in June and was ordered to attend rehab for two years.

The plea was part of a deal that will keep the Jackass star out of jail.
http://www.usmagazine.com/steve-o-returns-to-mental-institution