Dog ear deformities can form along incision lines after surgery. They are seen many times when a large amount of skin has to be removed with an elliptical technique. They are not that uncommon in tummy tucks, breast reductions and breast lifts.
Just because you have one does not mean your surgeon did something wrong. Even though your surgeon attempts to avoid dog ears, you may still get one. Sometimes incisions may need to be extended to flatten a dog ear.
Dog ears may be removed with a minor surgery, often using local anesthesia. Your surgeon will have to remove skin and sometimes fat to make the protruding area disappear and flatten out. Whenever you are having any of the above surgeries it would be prudent to ask your doctor about the risks and benefits of your surgeries. Good luck.