What is on my leg?

I'm 18 years old and I've had this little red bump on my leg for as long as I can remember. It gives me the urge to pick at it and it doesnt hurt. There have been long periods of time where I dont touch it and it just doesnt go away. There isnt any kind of liquid in it and it cant be popped. I'm just at... show more I'm 18 years old and I've had this little red bump on my leg for as long as I can remember. It gives me the urge to pick at it and it doesnt hurt. There have been long periods of time where I dont touch it and it just doesnt go away. There isnt any kind of liquid in it and it cant be popped. I'm just at a loss of what it could be
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