Otoplasty, or cosmetic reshaping of the ear(s), is done by combining several surgical techniques depending on the patient's presenting ear shape. Common to many prominent ER deformities is an ear (pinna) which is rotated and overly projecting forward, a very high and deep concha (the cup just adjacent to the ear canal), an indistinct antihelix and an often missing superior crus ( the upper limb of the Y shaped antihelix). Aside from rotating the ER back to the he'd, the concha has to be made more shallow. This can be done by either removing a cartilage sliver of the Conchal rim from the back or by doing so. Another ways is to remove the sliver with a smaller amount of skin through the front. The edges of the smaller Conchal rim are stitched together as are the skin edges.
In your case it appears the sliver was removed through a posterior incision and the cartilage removal resulted in an apparent skin excess.
Lou should see your surgeon to make sure there is no fluid under the skin which may suggest an infection.