Danny Bonaduce is dealing with a "mystery illness" that's confounded doctors, but he's taking the news in cane-assisted stride.
On April 29, the former "Partridge Family" star announced on Twitter that he was taking a "temporary medical leave" from his radio show.
"I'm still working towards receiving a diagnosis. What I know is, I need time to focus on my health," he wrote alongside the photo of himself being assisted by a cane.
A few days later, on May 1, Danny's sister, Celia Bonaduce, thanked fans for their well wishes and detailed the actor's health struggle a little more.
"Many of you have reached out to see what's going on with my brother Danny. Thank you," Celia wrote on Facebook. "Along with Dairy Queen dipped cones and your messages, he is feeling the love."
Celia then added that her brother's health issue is still unclear, but she revealed why he currently needs a cane.
"We are not being coy when we say this is a 'mystery illness,'" she said. "In layman's terms, his balance sucks- super sucks."
Danny, though, is taking it all in stride, tweeting, "Charlie Chaplin, Willy Wonka, Danny Bonaduce. I've joined the club of cool guys with canes."
Despite the unknown, Danny's sister has faith in the doctors.
"All the great medical minds of Seattle are at work trying to solve this conundrum," she on social media. "We will keep you posted. Please remember, that while he is a public figure, he is also my well-loved brother. Type your comments accordingly."