Stabbing pain 2 years after tummy tuck? Is that normal?

I had a tummytuck 2 years ago without muscle repair. If I wear tight pants or belt, I can feel stabbing pain at the same point, and sometimes I can feel it when I'm sleeping on my tummy. It's not that bad, it's immediately stops when I unbotton my pants, but should I worry? I have an other symptom, before my period (I don't know how, but it's definitely related), I can feel tickling around my bellybutton, and I just can't scratch it, it's inside my tummy. These are normal symptoms, or dangerous?