Christopher W. Chase, MD

Many women (particularly those who are overweight) have excess tissue that extends past the  outside of the breasts under the arms as a fold of skin and fat.  This typically lies under the bra strap.

Breast reduction is typically limited to the breast tissue itself and therefore does not involve removing the excess "flab" on the sides.  However,  this "flab" can become more noticeable after breast reduction and is a common complaint after surgery.

Improvement may occur with weight loss and/or time.  Surgical correction may involve liposuction and/or excision of the "flab" which may involve additional scarring. 

Surgical correction is not likely to be covered by insurance as it is basically a different issue from and unrelated to the enlarged breats that were corrected by the breast reduction surgery.

However, in your case, your insurance may cover an additional procedure since you apparently had some post-operative issues related to the reduction.  Your plastic surgeon should be able to advise you in that regard.

Best Wishes!