Former WWE Star Nikki Bella Says Doctors Found a Cyst on Her Brain—and Thankfully, It's Benign.

Nikki Bella, former WWE star and ex-fiance of John Cena, revealed the scary health problemsincluding a brain cystthat led to her retirement in an interview with TMZ Sports .

"They found a cyst on my brain, which thank god, it's benign," Bella tells the outlet. "I'm so grateful for my health."

Most brain cysts are benign, but they can still be serious, particularly if located on areas of the brain that control vital functions, . Treatment ranges from simply monitoring the cyst for changes to completely removing the mass with surgery. Bella told TMZ Sports that doctors recommended she monitoring "because you never know how it can change."

The former WWE Divas champion originally received a head and neck operation in 2016 to repair a herniated disk. Earlier this week, Bella appeared on The Tonight Show with Jimmy Fallon and revealed that doctors found additional health problems during a check-up.

"Then it came back that I herniated the disk above where I had surgery, I have all this inflammation around the metal, and then I have a cyst on my brain," Bella told Fallon. "So they were like, 'You're done, no more, you're out.'"

Although Bella wont be in the ring anytime soon, she doesnt want to rule out wrestling forever.

"You never know ... we'll see what the man upstairs has in store for me."