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Scar Tissue from Fat Grafting
Fat grafting itself doesn't leave surface scars, since the fat is placed through tiny needle entry points, not incisions. What patients sometimes feel is firmness or a lump under the skin, and that's usually fat necrosis rather than a scar. When fat is transferred, not all of it survives; some cells die and the body walls off that area with a small zone of scar tissue as it clears the debris. This can feel like a firm nodule, and it often softens or gets reabsorbed over several months as the body remodels it, though some firmness can be permanent depending on how much fat didn't take.
Without knowing where on the body this is and whether you're feeling a surface scar, a lump, or a contour irregularity, it's hard to be precise. An in-person exam, or at least photos reviewed by your plastic surgeon, would help sort out whether this is fat necrosis, a cyst, or something else entirely.
Clinical Context
How much grafted fat survives depends largely on technique and the health of the surrounding tissue. Placing fat in thin layers rather than large deposits lets more of it connect to a blood supply, improving survival. Naturally well-vascularized areas, like the face, tend to hold fat more reliably than areas with denser or scarred tissue. Smoking, prior radiation, and heavy scarring in the treated area can reduce blood flow and lower how much of the graft ultimately survives.
