5 weeks after hernia surgery i have very firm baseball size bulge above my belly button. when will this go away?

Get evaluated: At 5 weeks post surgery you are still inside the 90 day period of your surgeon. Okay to check in with your surgeon about this bulge. An ultrasound is a simple, easy diagnostic test that can reveal the cause. Good luck.

Maybe months : Sounds like a collection of blood and/or fluid. These sometimes take up to six months to resolve. Could be a recurrent hernia. You should see your surgeon to find out.