Heidi Montag Explains Why Her Arm Is in a Sling, Jokes She Looks Like RoboCop

Heidi Montag is recovering from surgery again — but it’s not what you think.

The Hills alum, 28, went under the knife recently to repair a tendon in her arm, and is now walking around with a big ol’ cast and a black sling.

“I haven’t had proper use of that arm in almost two years,” Montag tells Us Weekly exclusively. “I try not to complain about it much, but it’s been painful. It’s my tendon — it was pulling away from the bone, so I had to have it reattached.” See the photo on Us Weekly