According to Kim, 28-year-old Rob's current private struggle is because of many circumstances in his life including their father's death, certain break-ups and sister Khloe's split from Lamar Odom, reported Ace Showbiz.
"I think he's just going through a phase where he's not comfortable in his own skin," the "Keeping Up With The Kardashians" star told Matt Lauer on "Today".
"And he is working really hard to get back to where he really wants to be." Lauer responded, "All kids, as you put it, go through phases," before asking Kim, "But is his phase being exacerbated by the fact that he is part of this very public, very famous family?"