I had breast cancer 2 years ago, one lymph node was positive. I had lumpectomy , axillary clearance, 8 rounds of chemo and 30 radio. I now have a lump on my neck, on the same side as my cancer, about an inch in diameter, its just below my ear but not exactly on my jawline, I noticed it a few weeks ago, but I m not sure exactly how long ago.
The lump that you describe is possibly a lymph node in the upper part of the neck. Lymph nodes are present in all parts of our body and get enlarged due to infection or cancer in the Chat Doctor.  Now, the area that you have described is not part of the normal