HI 10 DAYS AGO MY HUSBAND WAS IN THE HOSPITAL

HI 10 DAYS AGO MY HUSBAND WAS IN THE HOSPITAL BECAUSE AFTER THEY DID A CAT-SCAN THEY FOUND HE HAS DIVERTICULITIS WITH LOCALIZED CONTAINED PERFORATION WITH A PREDOMINANTLY AIR-FILLED ABSCESS CAVITY MEASURING 5.5 CM WITHIN ADJACENT SMALL BOWEL MESENTERY CAUSING A SMALL BOWEL OBSTRUCTION , MY QUESTION IS HE REALLY NEEDS THE SURGERY? I'M SO SCARE ABOUT THAT? ANOTHER QUESTION DO YOU THINK IF HE MAKES THE DIET IS GOING TO BE BETTER, THE PAIN IS NOT GOING TO BE BACK? WHY YOU THINK WAS THE PROBLEM THAT HE HAS THAT SICKNESS? THANK YOU SO MUCH FOR YOU ANSWER:)