John Cena is getting real about the one regret he has about getting a hair transplant.

The WWE star shared that his fans didn't shy away from letting him know about his hair loss.

"They've held me accountable. They don't let you get away with phoning it in, because they'll eat you alive," Cena told People this week. "That's what a good support system does."

"As I was trying to hide my hair loss, the audience was bringing it to light," he continues. "I saw their signs that said 'The bald John Cena.' They pushed me into going to see what my options were and actually do some homework to learn about scalp health, hair health, follicle health. I now have a routine: red-light therapy, minoxidil, vitamins, shampoo, conditioner and I also got a hair transplant."

Cena shared that his fans were trying to let him know about the issue and not bully him into getting anything done.

"Just like a good friend, when you have something in your teeth, they pull you aside and are like, 'You have something in your teeth,' " he says.

Cena shared that while he's happy he got the hair transplant, there's a message hidden behind the procedure and the one regret he has.

"I hate the fact that if there wasn't so much shame around it, I'd have gotten it done 10 years ago," he says. "I thought I was alone, but seven or eight out of 10 [men] suffer from thinning or baldness."

He went on to explain how the procedure works. "They don't do anything except move your hair, one by one, from one area to another," he notes. "It's my hair and I'm not using this stuff [on the side] and I'd like to put it up [on the top]," he says. "If somebody's going to sweat me for that, I don't think there's any shame in that. It completely changed the course of my life."

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