My friend has a 2 yr. old Persian cat. It had surgery to open its nostrils more. Naturally it had anesthesia. After the recovery, it has been licking itself to the point of bleeding. (most recently, it's groin area) It has also begun to bite its penis area to the point of needing stitches. The vets cannot figure out what is causing this. There have been blood and urine tests, scans, and x-rays. Has anyone ever heard of such problem and has a solution?