The causes of PGAD are unclear. For some women, the condition is triggered by stress and alleviated somewhat when stress is removed. Therefore, some experts believe it may have psychological roots. Neurological and vascular changes might also cause PGAD.
Researchers have investigated links between PGAD and changes in medications and hormones. They have also looked into a connection between PGAD and restless leg syndrome.
Some cases may have no known cause at all.