I had a white "bump" show up at the bottom of my surgery site about 2 weeks after surgery... I kind of ignored it, thinking it would go away... until it openned up and a bunch of puss came out... turns out it was an abcess....
Your scar is quite a bit older than that, and it SHOULDN'T be any kind of abscess, but I always think of these things when someone says "pain" and "bump" in the same sentence..lol... :redface:
Our bodies do such retarded things to us... either way I would get it checked out....
(and BTW, if I ever give such retarded advise to a patient as what your surgeon's nurse gave to you, I hope someone yanks my licence and slaps me stupid .... that is just sick and wrong....)