Perhaps your primary care doctor suspects you have an anal fistula and has referred you to a specialist. Or maybe you are displaying common symptoms of an anal fistula. You may be anxiously waiting to hear more about the diagnosis and its treatment.  And it’s likely you don’t have a detailed idea of what an anal fistula is. Below, we’ll help you answer some of the many questions you might about anal fistulas, including how they are diagnosed, the preferred treatment, and more.