Thanks @lrb_03
My surgeon has given me that same advice although my seroma is right from the back of the axilla right across the top of the R breast, where the removal of the tumour was done. Initially after surgery I had a smaller breast as he had taken quite a large sample as I also had an extra 'satellite' tumor which was DCIS. I now have a larger R breast than my normal breast and I am going to have to head out to get a larger bra as I am finding it is now cutting in and the cup is now not fitting my breast. Annoying and uncomfortable at present, but hopefully that settles as healing continues.