Thanks for your query and a the picture.
The picture is self-explanatory. This looks to be a small sebaceous cyst. Small sebaceous cyst are common on the scrotal skin due to its corrugated natures, covered almost all the time hence excessive secretions of sebum and a blockage of the duct leads to the formation of the cyst.
In most of the cases these can be popped easily with a cure.
Very occasionally its removal needs a small surgery under local anesthesia if it starts growing and needs removal.
I hope this answers your query well.
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