Your belly button incision starts healing immediately after surgery and basically follows the same course as your abdominal incision. I take the dressing off the belly button after one week and remove the small external stitches I place during surgery at this time. Occasionally there are a few raw spots that need time to scab over and heal. Most patients start to really look and feel good after 4-6 weeks of healing, and I typically take my postoperative photos at the 3-month mark.
In normal circumstances, the healing process begins immediately. Typically any sutures can be removed in 1-2 weeks. While there may be a few crusts/raw spots a little longer they quickly resolve. The scar itself will change for over one year.