Capsular contracture. Do I need to stop breastfeeding on BOTH breasts, if only repairing one?

Hello, and thank you for your question. (Keep in mind that an in-person consultation is necessary for the best advice.) While you are breastfeeding, your breasts have a different size and shape compared to when you're not breastfeeding. Letting your breasts "dry up" allows them to return to their normal size and shape and allows your plastic surgeon to more accurately match the appearance of your breasts. Additionally, while you are breast feeding, the glandular portion of your breast is more active, and there may be an increased risk of contamination of the surgical site. 
If you decide to pursue surgery it’s very important that you find a surgeon whom you are comfortable with and trust and who evaluates you in-person and tailors an individualized treatment plan for you and your aesthetic goals. Best of luck!
Matthew A. DelMauro, M.D.

In order to carry out your surgery you have to stop breastfeeding and allow the breasts to involute.

MAKE SURE THAT YOU ADDRESS YOUR CONCERNS WITH YOUR SURGEON.

My advice would be to stop breast feeding for about six months.  Capsular contracture will involve removal of the capsule around the implant.  The dissection of this capsule will require releasing it from breast tissue.  If that tissue is engorged with breast milk, it simply adds an unnecessary component to consider during the surgery.  
If your preference is to breast feed, you may do well by asking your surgeon if the surgery can be delayed until you are done breast feeding.