4 days ago my 5 month old cat was neutered and had a umbilical hernia repair. Today while I was carrying him I noticed that the little bubble is back. Can umbilical hernias come back? Are they serious? I'm scared Simba will need surgery again, i don't want to put him through it again. He's due back to get his staples removed in 10 days, should I wait till then or take him in? Please advise.