I am a 20 year old woman. I am not overweight. I am not hairy. And there was no trauma to my tailbone. Somehow, however I developed a pilonidal cyst. All of the reasons that they have for people to develop this kind of cyst I do not seem to have. I have reasons to believe that my case may be one of the rare cases where it is congenital. I did have a dimple, but it never bothered me, and I don't remember ever being without it. I am very worried that it could become inflamed again. When I went to the doctor, they administered me some numbing agent around the tailbone, and then drained the cyst with a needle. No gauze was used, or stitching, or extraction. Doesn't this leave room for this to happen by a greater percentage?