Dr. Oz is joined by undercover reporter Elisabeth Leamy to explore the world’s most popular elective surgery – LASIK. Is the procedure really safe? Learn all about the hidden complications. Then, Dr. Oz goes to new heights to show you how anemia can leave you feeling exhausted.

We've all been there — we get a cramp in our stomach, maybe with some nausea or constipation. It's easy to think it may just be indigestion. But what if it's something more serious like diverticulitis? That's a condition of inflammation or infection in one or more small pouches that can form in your digestive tract. Here's how to tell the difference between the pain and how to know when you should see a doctor.

x