It sounds as though you are describing a "dog ear", or small redundancy of skin. As the surgeon closes the incision after an abdominoplasty, the least tensions is at the lateral edges of the incision. The surgeon tries to fit and upper and lower skin edges together and keep the incision as short as possible. Sometimes, in an attempt to help the patient, a small excess of skin is left (not visible on the operating table) that becomes manifest as a projection of skin and fat. It looks a bit like the ear of a dog and thus the term "dogear".
Treatment for the problem is surgical removal. It requires extending the incision further to allow for removal of the surplus skin. Most of the time it is a trivial procedure performed under local anesthesia.