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There are many kinds of body modification such as Tattoos, Piercings and scars, but all of these use your skin to work. Many animals in nature though, like snakes, reptiles and spiders often shed their skin. As redoing all of your tattoos or paying to repeirce your new skin would be ridiculous, what forms of body modification would survive a good old shedding of the skin?

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  • $\begingroup$ Fiction I can think of where human characters with tattoos have their skin removed (in case the ideas are useful): R. Williams' book The Metamorphosis of Prime Intellect has Caroline who occasionally has her tattooed skin removed, regrown, and re-tattooed when she feels her tattoos no longer represent her as well. W. Gibson's The Peripheral has Daedra who switches bodies, but has her old ones' skins removed and mounted, as an art project. $\endgroup$ – Anko May 18 '16 at 13:35
  • $\begingroup$ I'm pretty sure that Caroline was running as a simulation when she was skinned. $\endgroup$ – Michael Richardson May 18 '16 at 13:39
  • $\begingroup$ I edited the title to try to better capture the essence of your question. If you disagree, feel free to roll back. $\endgroup$ – a CVn May 18 '16 at 16:35
  • $\begingroup$ Humans shed their skin constantly. It doesn't seem to erode tattoos. $\endgroup$ – Howard Miller May 18 '16 at 20:31
  • $\begingroup$ A bit late to the party, but Related (at least for the tattoo part): How would tattoos fare on reptilian scales?. Disclosure: I'm the author of that question and its accepted anwser. $\endgroup$ – Linkyu May 20 '16 at 22:58
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we shed our skin too, we do it bit by bit, reptiles do it in one shot, and other animals work in patches. The skin that is removed is just the very superficial layer enter image description here

When we think about the "skin", the part you shed, we are basically talking that layer called Epidermis which is also composed by layers: underneath the shedding layer you have new skin cells and below that a layer you have the one where cells are active and will divide continuously to form new cells. enter image description here

Now, a tattoo has to be deposited at a correct depth for maintenance of the color and appearance. This is the top third of the Dermis layer, in the area that is too deep to be pushed outside basically. With modern equipment the tattoo is deposited at a constant depth, the needle goes straight down and the delivery of the ink is very precise. In the homemade (think jail tats) or older tatoos that used less precise instruments the needle would be a bit all over the place, the depth of the ink at this point is variable and if some is more superficial and is in the basal layer of the epidermis it could be slowly (very slowly) slough off. That is one of the reasons a tattoo might look like "fading" or changing color. Obviously with the less precise method you can also have ink delivered way deeper that will stay even if you actively try to remove it (unless you go at it SonsofAnarchy style).

If you compare an extreme shedding the skin to dermoabrasion you can see right away what could be the extent of "tattoo loss" you can obtain. Before laser dermoabrasion was a way to remove tattoos and some of them are simply too deep for that method. All the other kind of permanent body modifications are even deeper than the tattoos, that's why they are called permanent.

So unless you envision a skin shedding to a depth that is rather extreme, the reality is that its unlikely you will loose all your tats. But its worldbuilding so you can give a little nudge to reality if you really need to.

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Piercings.

(Imagine picture of Sir Hiss sporting a tongue stud. Caption: "like my pierssssssing?")

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    $\begingroup$ If it's a tongue stud, wouldn't that be "like my pierttttthhhhhing"? $\endgroup$ – ckersch May 18 '16 at 18:03
  • $\begingroup$ Terry Thomas voisssssed the character with a prominant silibance. $\endgroup$ – JDługosz May 19 '16 at 12:44
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To name a few: skeletal/cranial modifications (for example, humans used neck rings and skull shape modifications), body shape modifications (tightlacing, lotus feet), various implants, haircuts and hair coloring.
(You could also check wiki list of modifications, most of them do not rely on skin).

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Piercings, brands, and scars. piercings because well it doesnt really have to do with marking the skin as much, branding becasue it makes a permenant marker on your skin, even if a creature would shed, and scars if they are deep enough (and will be healed naturally eventually)

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Both Percings and Scars (Depending how severe the scare is) would remain

A percing would remain as it doesnt just affect your skin, it pierces your flesh so unless you regrow your muscles as well the hole for the percing will remain.

Why the human body does stuff and the science terminology are a bit (a lot) beyond me so I have tried to dumb it down to my level so I can explain it

A scar, unless it is just skin deep, would also remain as a scar is soft tissue. The link explains it quite well that even I could understand most of it. A short version of what they link says is basically; When you recieve and injury (no matter how big or small) it damages the "collagen strands of the fascia" (From what I could gather these are the threads that make up soft tissue) that damaged part of the body will then bind closer parts of the soft tissue to reduce strain, after a resting period the scar tissue should heal but doesnt always. @Erik vanDoren Does a wonderful job of explaining how scaring works below in the comments.

Also you will remove all moles with your skin and are likely to have new moles in different places

I do not understand biology too well so take this witha pinch of salt

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    $\begingroup$ Fascia is a tissue layer that covers all the body, think about layers of saran wrap. Its around organs, muscles etc. Each layer is supposed to slide over body structures and other layers. In a scar the body tries to repair the damage reticulating everywhere it can, thus binding layers. You cant eliminate a scar but in rehab we add mobility to it and when it comes to skin you can reduce the appearance of a scar to some level. $\endgroup$ – Erik vanDoren May 18 '16 at 12:51
  • $\begingroup$ @ErikvanDoren , I see so its basically another layer to the human body and when the body is injured this layer replicates itself to keep the layer bound. I think that is the general gist of what you said at least $\endgroup$ – Mr.Burns May 18 '16 at 13:30
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    $\begingroup$ not one layer but several, and at every depth. Think all layers of saran wrap, make a cut with a knife, then repair the cut with some glue, in that spot all the layers are stuck together and the blob of glue is your scar. Ever had granma fixing an hole in a sock and she sew that thread catching all the perimeter of the hole and pulling it together? Your body does the same. Think that some mothers complain about back pain and that can be due to scarring from cesarean sections that binds way too deep. The body goes full out when it repairs stuff, its not a light touch $\endgroup$ – Erik vanDoren May 18 '16 at 13:51
  • $\begingroup$ @ErikvanDoren , very useful information, thank you :) $\endgroup$ – Mr.Burns May 18 '16 at 14:13

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