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Just enjoying my ride on the public transit when I look up…… (ಥ﹏ಥ)(r/WTF)
Just by observation, I’d say it’s either an abscess (i.e. bacterial infection) or basal cell carcinoma, possibly squamous cell carcinoma.
It looks as if someone tried to burn/cauterize it at one point, probably thinking it was a wart, so I’m leaning more towards malignancy. It could also be necrotic (i.e. the tissue has lost its blood supply and died). Just as a general FYI, infections tend to be painful to the touch and warm, however malignancies often don’t hurt at all leading many people to just ignore it hoping it will go away. Does this look like it’s going away anytime soon?
Let this be a lesson WTFers. When shit gets nasty, see a doctor!
Edit: HiZukoHere had a good point in that this could be a sebaceous cyst, especially if the “burn” that I wrote about above is actually a punctum. This is actually a good example of personal bias, since I’ve seen a few BCC in that location but never a cyst.
Edit2: A lot of people are commenting on my user name. I’m not sure if this ruins it or makes it better, but it’s actually an (admittedly obscure) allusion to “Ender’s Game,” a novel by Orson Scott Card and well worth your time if you haven’t read it. One minor character refers to himself as “a fart in the air-conditioning.” Here’s the quote on google books.