In general, if a cyst grows big enough, it can interfere with the ovary’s blood supply, cause the ovary to twist (known as ovarian torsion), or even rupture …. All of which can cause pain, bleeding, and the other symptoms Bieber describes.

Ovarian cysts are very common and usually go away within a few months, but sometimes they may trigger various uncomfortable symptoms

Hailey Bieber, who has previously been open about her reproductive health, shared her struggle with a pair of ovarian cysts on social media Monday.