Should I have an exposed spitting stitch removed if it doesn't hurt?

I am post op breast lift and augmentatation 4 weeks and have a spitting stitch. I originally thought it was an external stitch so I used a splinter pin to try and drig it out. To my horror as I tried pulling I could feel it was like a nylon stitch and the then I could see 2 knots in the stitch. The hole is not big when I opened it but the suture is visible and I can feel it when I rub my finger on it.