Ive had a pea sized hard lump on  the inside of my scrotum on the perineum ridge for a couple months.  This small lump has dramatically enlarged in the last two days to the size of a marble and is very sensitive.What might this be and do I see an internal medical doctor or a urologist?  Surgeon or not?  Is emergency treatment needed?
Hi. The area you have mentioned and the nature of lump and increase in size makes me think of a sebaceous cyst undergoing change due to infection. Most of them rupture and get healed n its own. But a few can spread to the surrounding to make the case more complicated (a few albeit). IT is better be seen be a Surgeon ASAP>