My incision area still bothers me, and I had my surgery close to a month before yours. It's not so much the skin incision, but more where the muscles and other tissue were cut and sutured back together underneath. I can feel that a little further towards my butt than the actual skin incision line.
I don't think there is anything wrong with mine (and there probably isn't anything wrong with yours either, Carol)--a lot of cutting and sewing stuff back together happened there and it will take a while for that to completely heal. Also as we get more active and move/stretch the area, I think we feel it more than when we were sedentary. I have 2 specific stretches that my surgeon told me to do to stretch out the area. I can tell it helps. If I don't do them for a few days, things start to tighten back up again.
I remember the incision from my hysterectomy (9" bikini line incision) felt painful here and there for at least 6 months ... maybe even close to a year before things were completely healed. I think this is just a normal part of the healing process. They didn't cut any muscles with that, just pushed them out of the way, so the hip surgery was more involved.
It is strange, though, when the joint feels really good, yet there is pain and tightness around the incision that's quite a ways away from the actual joint replacement. That has seemed strange to me too. I don't think I ever felt any pain in the actual joint or from the bone cutting and prosthesis insertion after surgery. It was always pain where they did all the cutting and stitching. And, because I have ample tissue there (AKA extra fat), maybe I'm noticing it more than someone who didn't have as much for them to cut through to get to the joint. Just guessing. Regardless, it hasn't been a big deal overall, but it is an odd feeling at this stage of the game when the joint itself feels as good as new. I hear you.