Can A Labia Majora Lump With Soreness, Itching And Redness Be Treated?

I have a bump on the top of my left labia majora. It is red, smaller than a pea. There is only one. I have had sex before but we were both virgins and are still together. I had oral sex with one other person before my boyfriend. There is no opening, looks like a pimple. It s sore and pretty itchy. Please let me know what you think?