Is it folliculitis or sexual transmitted skin problem?

[MAUI]

I was about to sleep tonight when I (for whatever reason) just touched my labia majora, and felt there was a little lump there. I stood up and reached for a portable mirror and looked into it, and I saw, it looked like an elevated skin surface,(I felt with the tip of my right index finger), it is not painful, nor any discharge coming out, slight red on the little area surrounding it, with a little brown dried dot on the middle. I am quite worried because I never had any thing like this before. I am only having a sex with my boyfriend who is in Italy and then only happens when I come to meet him ( the last time I visited him was on the 25th of June and I came back  to London on the 5th of July). He is monogamous as well he never had sex with anyone other than me since we've been on for a year now, (He had a sex with some pub girl 2001 which he and his 3 friends shared as well). With this skin problem in my labia majora, I don't experience any urinary problems. Please help... I'm really am worried. Do I need an anti-bacterial medication? Do I need to see any doctor? Will it go for sometime without treatment? What causes this problem? I do appreciate your reply. Thanks.

[Alan Rockoff, MD]

This is probably a cyst (common in the vicinity) or some other anatomical variant of no significance.  Because such things don't go away, you're probably better off allaying your anxiety by showing the bump to a doctor.  But I doubt you have any reason for concern.

Best.

Dr. Rockoff