Pain around my waist penetrating to my ribs I had a cat scan and my right kidney is inflammed. I do not have a kidney infection or uti. What could cause this problem?

Not certain. Inflammed has many meanings. Infection of the kidney called pyelonephritis can occur if infection moves up from bladder or via bloodstream. Renal stones can cause secondary inflamm. Intersitial nephritis, usually bilateral, from certain medications, autoimmune diseases and many other rarer causes. Sometimes spillage of protein is sign of interstital nephrtitis. You should consult your doctor.
Your. Your doctor should review the ct images personally. The possible diagnoses are multiple. Most are benign, but malignancy should be excluded.