Suggest Remedy For Pimple On Labia Minora

Im 22 years old, weight 81kg and Im 1.61m tall, Im sexually active, and have had unprotected sex. I have a pimple the size of a needle head on my labia minor, it itches when I touch it, and when I scratch it, it burns, Ive been getting them sincee I was little, even before I started my sex life, and I was just wondering what they were, I just have one every four or six months, hmm, the day before getting it Ihad sex with my boyfriend on the beach and my pussy got stuffed with some sand, idk, its just itchy, Im 22, and I just had my pap done and it came negative