What are the causes of ovarian cyst in a girl?

Many: Small "cysts" of the ovary are common and a normal part of the ovary developing "eggs." at times this process goes haywire and a baseball size or ^ fluid filled cyst and form. Frequently, they "dissolve" and no treatment is needed. However, these patients should see a gyn doctor and be followed since it is possible for these "cysts" to form more serious masses that could need surgical treatment.