An often overlooked cause of migraines is head and neck injuries. These injuries can lead to abnormal function of the spinal venous plexus, a network of veins in the spine responsible for draining blood from the spinal cord. When the spinal venous plexus does not function properly, it can impair spinal venous drainage. This issue is thought to arise due to autonomic dysfunction, which can occur secondary to spinal cord ischemia (reduced blood fow to the spinal cord). This dysfunction leads to a cascade of efects that can contribute to migraines. A signifcant consequence of impaired spinal venous drainage is the decreased ability of the cranium to accommodate volume fuctuations. Normally, the cranial system can adjust to changes in volume, but when this capacity is reduced, it creates a state of decreased intracranial compliance. This means that the brain and its surrounding structures are less able to handle changes in pressure and volume, potentially triggering migraine headaches.