ET has learned the 28-year-old reality star recently became reclusive.
Rob Kardashian has been diagnosed with diabetes, according to a report by TMZ.
The 28-year-old reality star was reportedly taken to a hospital after he wasn’t feeling well over the weekend. Doctors stabilized him and diagnosed the condition, which Rob wasn’t aware he had, according to TMZ.
WATCH: Khloe Kardashian Admits to 'Babying' Her Brother Rob: I Made Life Too Easy for Him
ET has learned Rob has recently become reclusive, not leaving his neighborhood and no longer doing routine workouts.
A source told E! News on Tuesday that Rob had returned home from the hospital and is "fine now."
"It was a wake up call," the source said, adding that doctors told Rob that he needs to lose weight, exercise and dramatically change his diet, or his condition will get worse.
The only son of Robert Kardashian and Kris Jenner, Rob has stayed out of the public eye in recent years. He was last spotted back in June, hitting up an In-N-Out Burger in Woodland Hills, California with some friends.
While Rob hasn't appeared on the latest seasons of Keeping Up With the Kardashians, on an episode in April, his mother claimed that he had gained 100 pounds in the last year alone. "I feel like if I don't help him do something drastic, that he's gonna die," Kris said through tears, while discussing her son’s problems with a life coach.
WATCH: Kris Jenner Reveals Where Rob Kardashian Spent Thanksgiving: 'He's Working On Himself'
Rob’s sisters have recently shown their support and love for their brother on social media. Kourtney Kardashian posted a photo of the two on Instagram last week, with the simple caption, “Bobby. ❤️,” while Khloe shared a throwback photo of the two with sister Kim Kardashian and family friend Jonathan Cheban.