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 draining area. Now, the area that you have described is not part of the normal draining pattern of breast cancer
. Had it been in the lower part of the neck i would have been more worried. Another possibility is that it may be an enlargement of the parotid gland
( a gland that produces saliva and is present in the neighbourhood of the ear). It can be enlarged in a variety of conditions including cancer. In short, you need to see your oncologist
to ascertain which of the two it is. He will have to get a needle test done to decide upon its nature (FNAC). Meanwhile you can start yourself on Tab Ciprofloxacin
500mg twice daily for 5 days to take care of an infective etiology.