Small wound infection months after lumpectomy

Has anyone has any issues at the scar site months after surgery? I had a pain which was put down to a stitch not dissolving on my doughnut scar but the BC nurse said not to worry as it wasn’t hot or spreading. It eventually burst after some shooting pains……3 months later it did it again…48hrs of a green spot,  the pain being intense then tonight it burst again. Oozing white gunk! And leaving a small whole in the skin.

 Is this normal?