Credit: Rob Kardashian/

Medical drama for the Kardashians.

Rob Kardashian underwent an emergency appendectomy on Tuesday. Kim, Kourtney, and Khloe's little brother, 24, arrived at the emergency room with his mom Kris Jenner after complaining of stomach pains, TMZ reports.

Doctors quickly decided to remove the reality star's appendix. Before finally checking into the hospital, Rob had apparently been dealing with excruciating pain at home all day while big sister Kim, 30, took care of him.

Although he's still recovering post-op, Rob is "fine and doing well," a family insider told TMZ.

"Wow LOOONG night in the ER!," Kris Jenner Tweeted Wednesday after the ordeal. "Pooooor Rob! My son has no more appendix!! I love you @RobKardashian you were so brave! Xoxox."

The relieved mom added: "I love you so much!!"