When I had my surgery my incision opened up and I had an infection. I recovered and all was well. But I'm 9 months out and on that same side the butt cheek is suddenly tender to touch, sit on, and so on. But what is crazy is that even a gentle finger touch hurts. It's not the entire cheek, it's just a circular area on the hip side of the implant. It's not red. It's not hot. I have no fever. It's been two weeks.