When a migraine sufferer experiences constant attacks for a period of time, then have a period with no migraine attacks and no symptoms it is called cyclic migraine syndrome. People with the rare cyclic migraine syndrome often have long-lasting migraine attacks and complain of typical migraine symptoms.
Depending on the individual, the cycle of migraine attacks can be one week or up to six weeks. During the cycle of migraines the head pain and other migraine symptoms can strike every single day or many times per week. Then there are quiet periods with no pain or low pain. The migraine cycle is then followed by a time with no symptoms that can last weeks or months.
Although cyclic migraines were first described in medical literature in 1977, there is no distinct, separate definition in the diagnostic guide from the International Headache Society. Doctors sometimes call cyclic migraine syndrome an unspecified migraine, because it doesn't fit into one of the well-established, well known descriptions of other more common types of migraine.