<a href="https://en.wikipedia.org/wiki/Chemical_burn" class="extiw" title="en:Chemical burn">Chemical burn</a> caused by exposure to a &lt; 10% (by weight) <a href="https://en.wikipedia.org/wiki/sodium_hydroxide" class="extiw" title="en:sodium hydroxide">sodium hydroxide</a> solution (<a href="https://en.wikipedia.org/wiki/lye" class="extiw" title="en:lye">lye</a>).  Photographed 44 hours after exposure.
<a href="//commons.wikimedia.org/w/index.php?title=User:Blazius&amp;action=edit&amp;redlink=1" class="new" title="User:Blazius (page does not exist)">Blazius</a>
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<span class="int-own-work" lang="en">Own work</span>