Hun I had exactly the same appear at 5weeks post opp..it then opened up and left tiny hole in my incision line…I didn’t panic, just left it as I knew it wasn’t infected..I just got some dressings from work and covered it and in a couple weeks it healed over..I went for my 6 week check, although I was 7 weeks by then and nurse said it was fine and it had healed nicely it was just stitch…..no problems with it since…if you are worried then ring your nurse…but if you are in no pain or sign of infection then just let it heal itself x