This is Dr. David
it looks like a bug bite or spider bite or mosquito bite
doesn't look infected at this point.
try some 1% hydrocortisone cream on the area for itchiness and neosporin and a band aid
but it will get better
let me know if you have other questions.
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no, it is not skin cancer.
I am a cancer doctor.
skin cancer doesn't just pop up like this and start to itch
you are a bit young for skin cancer
skin cancer doesn't calm down on its own either.
it is a bug bite.