In general, the skin becomes a little thinner and more fibrosed after each surgery. If you start with a thicker, more sebaceous skin envelope, you can withstand more surgery. Even if you have thin skin, very meticulous, careful surgery can be done successfully, but there is greated risk of skin damage or contour imperfections visible through the thinned skin. If the skin is nearly translucent or turns purple or blue with cold exposure, it may be too compromised to safely undergo surgery. All of these considerations are true whether it an open or closed approach. If the skin is thin, there are measures during revision which can be taken to reduce risk, such as placement of fascia beneath the skin to provide greater bulk to the soft tissue covering.