Viral blackout tattoo was ‘most painful s–t I ever experienced’

Machine Gun Kelly is taking fans behind the scenes of the blood, sweat and tears that went into his viral blackout tattoo.

The 33-year-old “Bad Things” rapper shared a clip to Instagram on Monday, which he started by showing off his previously colorful upper body tats before covering a majority of them with black ink.

“Today marks the day that I start the physical change to my body. We’ll see what this turns out to be,” MGK tells the camera.

The video continues to document the many hours and intense needling needed to achieve his new look — including a few shots of what looked like blood on his arm and his goose egg of an elbow that swelled up due to the constant attention.

“We’ve done about seven sessions,” he told the camera again in an update. “It’s been about two weeks since we started. This was the most painful s–t I’ve ever experienced in my life.”

The “Genre : Sadboy” artist’s new ink covers his entire upper body — including his nipples and belly button, which he got a kick out of in Monday’s video.

“Wait, is that my belly button?” he asked the camera operator upon a close-up of his blacked-out navel. “Oh my god, look at my f–kin’ belly button,” he laughed.

MGK also included a shot of himself sitting in his hyperbolic oxygen chamber “to heal faster.”

“So…what else should I get now,” he captioned the clip.

In his piano rap ballad “Don’t Let Me Go” released last month, MGK claimed he “had a breakdown” before undergoing the appearance-altering ink.

“Wish I didn’t listen just like I wish they would understand me one time / I had a breakdown and tatted my entire body except one line / Everything’s just fine,” he raps.

His new art piece was done by tattoo artist Roxx, who told The Post in February that they completed the tattoo over Christmas in New York.

“MGK was the toughest client she’s ever worked with,” a rep for Roxx told us.