6 Weeks After Free Nipple Graft, There are Holes that Have Opened that are Leaking a Little, Should I be Concerned?

It can take several weeks to completely heal after a free nipple graft surgery to reconstruct the nipple.  From your description, it sounds as if some of the deeper sutures that were placed during the surgery may be working their way to the surface of the skin or "spitting".  In most cases this is self limiting and will resolve with time.  However, I would suggest that you check with your surgeon.  If the sutures that were placed were not absorbable or are of larger diameter your physician may want to remove them. Best wishes.