Ashton Kutcher says he's "lucky to be alive" after dealing with a rare autoimmune disorder, PEOPLE reported.
In Access Hollywood's sneak peek at an upcoming episode of National Geographic's "Running Wild with Bear Grylls: The Challenge," the 44-year-old actor opened up about his private battle with a condition that left him unable to walk, see or hear.
"Like two years ago, I had this weird, super rare form of vasculitis that knocked out my vision, it knocked out my hearing, it knocked out like all my equilibrium," Kutcher revealed in the clip. "It took me like a year to build it all back up."
"You don't really appreciate it until it's gone," he continued. "Until you go, 'I don't know if I'm ever going to be able to see again, I don't know if I'm ever going to be able to hear again, I don't know if I'm ever going to be able to walk again.'"
The That 70s Show actor added that he's "lucky to be alive" and is now using the health scare as a learning experience.
"The minute you start seeing your obstacles as things that are made for you, to give you what you need, then life starts to get fun, right?" Kutcher said. "You start surfing on top of your problems instead of living underneath them."
Vasculitis is an autoimmune disease that causes inflammation and narrowing of blood vessels, which restricts blood flow and can cause damage to the organs and tissue.
Symptoms may include weakness in the hands and feet, abrupt hearing loss or temporary blindness in one or both eyes, according to the Mayo Clinic.
17:26, November 27Shakira intends to stand trial
15:13, November 27GQ names Bella Hadid world’s most stylish celebrity
13:21, November 27Brawl erupts between rapper Headie One and a rival at Sony Music HQ in London
11:24, November 27'Strange World' scores Disney animation's worst CinemaScore
10:13, November 27Queen Elizabeth's biographer puts forward new theory for her death
23:21, November 26Amber Heard tops list of most popular celebrities in Google searches
16:16, November 26Jennifer Lopez announces first album since 2014
12:12, November 26Lost treasure. Deleted scenes of ‘Iron Man 2’
10:14, November 26Alessandro Michele resigns as Gucci creative director
18:01, November 2578-year-old Squid Game actor Oh Young-soo accused of sexual harassment
15:27, November 25Apple TV+ to release documentary about Rihanna's return
14:11, November 25Brazilian writer accuses Netflix of copyright infringement in 1899 series