Rapper Bow Wow has admitted his hospitalization last week was not due to "exhaustion and stress," , but, in fact, because of blood loss that followed an angry pre-concert outburst in which he severely cut his hand, PEOPLE reports

The musician, 20, "hit something and cut my hand," he tells MTV. "It would not stop bleeding. I lost a lot of blood, went onstage, put out a lot of energy, came off, got light-headed. I fainted, went to the hospital."

"I was bummed out because a lot of the stuff that I had as part of my show wasn't there," the rapper says. "I was upset nobody made me aware of it, and I threw a tantrum."