Rob Kardashian Posts, Then Deletes, Tweet About 'How Much It Hurts'

From the looks of it, the Kardashian-Jenner clan had the time of their lives on their recent Thailand vacation, posting photos of beach jaunts and pool dips – and, as was the case with Kim Kardashian, fleeing from overly chummy elephants.

Although Bruce Jenner and sons Brody and Brandon also joined the getaway, noticeably missing were Kourtney Kardashian and Scott Disick, as well as Rob Kardashian, who posted a cryptic Tweet early Wednesday morning. 

"No one will ever understand how much it hurts," it read. 

Shortly afterward, however, Rob purged his entire Twitter feed, deleting all his old posts and rebooting his account with – as of Thursday afternoon – a single Tweet taht read: "mi Familia is home! Yeeee!!" 

A source close to the family says that the reality star and creator of the Arthur George sock line "hasn't been happy lately," noting that Rob, who struggled with weight gain on the show, "still doesn't like the way he looks." 

Rob has been less of a fixture on Keeping Up with the Kardashians lately, choosing to retreat from the cameras and public photo shoots. Says the source: "His family is concerned."