Hi, My name is*****'m a board- certified Ob-Gyne. Most likely this is a blocked gland. There are hundreds of glands in the genital area. Sometimes some dead skin will get pushed into one of the gland openings and block the secretions from draining. This caused a round tender bump. Continue to do the warm compresses and Sitz baths, for 10 minutes at a time at least 4 times daily. Ibuprofen can decrease pain and inflammation if you're able to take it. If it's not gone by the time of your appointment, it may need to be drained. I hope this was helpful. Please reply if I can clarify anything. I want to be sure you have the most helpful information for your situation.
They can be recurring. They do tend to happen if there has been sweaty moist rubbing such as with sex or exercise wearing tight clothes like lycra shorts.
So showering after sweaty rubbing conditions helps prevent recurrence. Also wearing loose cotten breathable clothes when exercising can also help avoid them.
In women who have a lot of trouble with them, we add plain soap scrubs 2-3 x weekly to remove the dead skin that tends to get pushed into the gland pores.
These blocked glands are very common and not a sign of anything worrisome.
I'm glad my answer was helpful. Let me know if I can clarify anything further.