hello
I am a woman,but I have a large bump/lumpp like that inside my upper thigh.It is a lymph node that is swollen.A dr. years ago put me on an antibiotic especially made for skin.It was called duricef(sp?)..it made the lump drain and it went down from the size of a large marble to the size of a dime.After so many years though it's back to being big again,but my dr. said to just leave it be.Seeings it's not painfulI don't worry about it,but it looks gross.
Hope this helps you,but you should get it checked out in case it's something else.
Scout