Expert Q & A Answers About carbuncle

I get a painful, pea-sized bump on my genitals. What is it?

About four times a year, I get a painful, pea-sized bump on my genitals that lasts only a few days. I never get more than one at a time, and they’re never in the same place. The bump looks like bad acne and even has a whitehead...like a pimple. What is it?