EXCLUSIVE

Stephen Belafonte has done what Mel B did last month … landed in the hospital … TMZ has learned.

Stephen showed up at the Cedars-Sinai ER Tuesday AM … complaining of back pain. We’re told he says he doesn’t know how he hurt it … but it’s gotten bad enough that he needs medical help.

Mel B took him to the hospital and is by his side.

You’ll recall she was laid up in the hospital in December for an undisclosed medical problem.