I stopped at exactly three weeks. I still had some pinkish blood and scabbing when I stopped the dressings. After I just used band aids and neosporin. I just followed my surgeons (Dr. G) care instructions and my nips turned out fine. If you're really worried, call the doctors office. I did and I was told to just cease xeroform use at 21 days after post op. They really will heal, It just seems like it takes a while.