The word “fistula” means abnormal connection between two structures that are normally not connected. An arteriovenous fistula is an abnormal connection between an artery and a vein. Any part of the body can have a fistula. The brain is surrounded by a tough fibrous cover called “dura mater” or “dura”. When a fistula forms between an artery and a vein within the dura, it is called Brain Dural Fistula, or Brain Dural Arteriovenous Fistula. The symptoms of DAVFs vary depending on the location of DAVF. Headache is one of the non-specific symptoms that could be associated with all types of DAVFs.