Sounds to me as though he has an infection maybe & a course of antibiotics will probably do the trick, but I am not a Dr. The best thing, is to wait & see what the dr says. I had a lap cholecystectomy a week ago & am still suffering under my ribs. As my surgeon said to me, its the same procedure, even though its done in a different way. But the fever certainly sounds like hes fighting off a bit of an infection somewhere. Try not to panic though!