what can the occasional throb pain, 4 month after mastec?

[CLTann]

Dear Friends,

I had 1 cm invasive ductal cancel, ER/PR/HER2 all positive. I opted for mastec 09/05. Clear margin. No chemo and no radiation. On Arimidex. Just about one week ago, I had occasional pain from the area where the skin was cut and sewed together. There is no palpable tissue under the area. When I press down at the area, there is no pain. As we all have the fear on anything abnormal, I would like to ask those who had the same operation whether they too had this problem. The original tumor was in the 3 o'clock and distant from center position, it is not likely that there is residual cancer cells nearby. All sentinel nodes (4 taken) were negative. Otherwise, I feel fine.

Any advice is welcome and appreciated.

Ann