I'm 15 and i've never had sex before. About 5 months ago I noticed a bump and I went to a gyno about 2 weeks ago. She told me it was a cist but it was in a very odd place compared to where normal cists are. She gave me a prescription that I decided to take when school starts because it won't allow me to be in the sun. Recently it began to get bigger and I was wondering if it was because of ...How do I put this... Me and my girlfriend have taken a couple steps further and she has been touching me where the cist is repeatedly. I was wondering if that was why it was getting bigger.

Another q: what causes cists?