Bret Michaels faced a medical emergency on Thursday, cutting short a concert in Manchester, New Hampshire after suffering extremely low blood sugar, the Associated Press reports. The singer – who has battled with diabetes since childhood – was forced to leave the stage after three songs and was being monitored by paramedics that night.

Michaels' guitarist, Pete Evick, confirmed the singer's health issues in a post on Michaels' official website. "In the nine years I've stood next to him, I've never seen a look like the one on his face, as if I was a complete stranger," Evick writes. "One of the crew returned instantly to notify me that Bret's sugar was extremely low. . . He returned to the stage to announce that he could not continue. As you all know, he is a health fanatic and fiercely monitors his blood sugar; he basically had to be dragged off the stage in his sickest of conditions."

Evick says the singer's condition was so bad that "he could barely speak," yet Michaels insisted that the guitarist apologize to their fans. Michaels' team also thanked the medical crew in a tweet: "Sending a shout out 2 all the paramedics both on & off duty who assisted Bret tonight," wrote "Team Bret." "No words can thank you enough for ur help."

Michaels has battled a number of health issues in the past several years. In early 2011, the Poison frontman underwent successful surgery to repair a hole in his heart; a problem that had existed since birth, but was only discovered in 2010 when the singer was hospitalized with a brain hemorrhage. Nonetheless, he's remained musically active, releasing a collaboration-heavy solo album, Jammin' With Friends, in 2013.