Grey Thumb Lump?

Hi, about a year and a half ago, I got super glue on my thumb (near distal joint) and pulled it off. Since then, it's left a raised, dry, cracked thing with a texture that's similar to play-dough (and can be molded a little bit) it changes colors, from purple, to grey, to red, to skin tone. It sometimes cracks and bleeds in the middle. It makes it hard to move my thumb sometimes. What is it? Thank...click here to continue

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