Itchy red bumps along incision site 4 weeks after tummy tuck. Is this part of the healing process?

I'm four weeks post op from a full tummy tuck. Over the past few days I've developed an insanely itchy rash (small red bumps) along the outside edge of portions of my incision line. I have not been using any lotions or ointments at all. Is this part of the healing process? What could be going on? I have been using gauze and tape over some areas where some sutures have spit, but the rash isn't only around those areas. It seems odd. Thanks for your answers!