I had a lumpectomy in October and my breast is like this as well - I've assumed it was scar tissue but plan to check with the radiation oncologist when I see her on Thursday.
Hi @Carol Lina -- I have the same thing, too; I understand, in my case, that it is scar tissue. But best to contact your BCN to put your mind to rest.
If your breast clinic isn't a long journey, or you are at the hospital for other reasons, you could always try popping in to see if one of the nurses in the clinic might take a quick look.