Those pesky buggers have driven the youngest Baldwin Brother out of the Costa Rican jungle — and we’re not talking about Heidi and Spencer.

After abruptly quitting the NBC summer reality series I’m A Celebrity… Get Me Out Of Here in the last leg of the competition last Friday, Stephen Baldwin is sounding off on what sent him packing.

Stephen says he was forced to quit the show after insects harvested eggs beneath the surface of his skin.

“It’s the absolute creepiest thing that you can think of,” says Stephen whose skin still crawls when he thinks about bug-biting adventure in the Costa Rican jungle.

“I suffered in the first eight days of production, while in the jungle, over 125 insect bites on my body,” he told Kevin McCullough, co-host of Baldwin/McCullough Xtreme Radio, in an intervview Sunday.

“And two of them – much to my surprise – became kind of lumpy initially. Within 72 hours they were these kind of half-dollar-size lumps under my skin that were probably about an inch thick. [The] reactions just weren’t the same as the other 123, so to speak.”

“I did get to take some time with the medic, who explained to me that, in his opinion, he didn’t think that is was the ‘implantation of insect larvae into my flesh,’ but that – oh, gosh – that’s what it could be,” he explains.

“So… they tested these things and, sure enough, Stevie B. was ‘pregnant.’”

Listen To Stephen’s First Post-I’m A Celebrity Interview