This is not at all unusual with the type of lift you had (called a circumareolar mastopexy). The circulation to the nipple and areolar is partially restricted by the scar all the way around the areola which make the areola and the glands of Montgomery swell. These are the bumps you are seeing. They will diminish as the swelling subsides.
For a brief review of Mongomery glands click here:
http://en.wikipedia.org/wiki/Glands_of_Montgomery

