Your husband bent over while twisted a now he has pain and a bulge on his left side under is ribs what is it?

it is a herniated disc or "slipped disc" as many call it.

In addition: it is not the entire vertebral disc that has shifted; it is only the nucleus pulposus (NP) which has pushed out from in between the tough fibers that make up the outer portion of the disc, This portion is called the annulus fibrosis