(NEWSER– The first time Michael Spann cried blood, it "felt like I got hit in the head with a sledgehammer." 

It wouldn't be the last time.

Blood began pouring out of Spann's eyes, nose, and mouth on a daily basis when he was 22, he tells the Tennessean.

And though now, seven years later, it has slowed to a few times a week, the condition remains painful and debilitating.

"Any job I get I lose because my eyes start bleeding," Spann says.

Worst of all, it's totally unexplained.

Read the full story on Newser.com