How it works
Everything begins with a consultation. Your surgeon looks closely at the missing part of the lip: its location, size, depth, and the healthy tissue that remains around it. If the defect is related to cancer, your surgeon will confirm the tumor has been fully removed before rebuilding. This is also when you say plainly what matters most to you — eating, speech, sensation, or appearance — so that together you agree on a realistic plan.
About anesthesia (how you are kept free of pain during surgery): for a small defect, your surgeon may use local anesthesia, meaning only the area around the lip is numbed while you stay awake. For a larger defect or a more involved technique, you may have general anesthesia, where you are fully asleep for the whole operation.
During surgery, your surgeon uses healthy tissue nearby to rebuild the missing section of lip. One common technique is a local flap — rotating or sliding a patch of nearby tissue to fill the gap while keeping its blood supply intact. Your surgeon's aim is not only to fill the space, but to rebuild the vermilion border (the line between the lip and the skin), the thickness of the lip, and, where possible, the ring of muscle around the lip so that you can close your mouth and show expression.
Depending on how much is involved, some cases need more than one operation, spaced weeks to months apart, to refine the shape or release the flap. Your surgeon will talk this through with you from the start if your plan is likely to need more than one stage.