UD CREAW

Migraines, cluster headaches follow sleep-wake cycle, study suggests

Migraines and cluster headaches have different characteristics and treatments, but experts have long noted that they share key features: Both are neurological diseases in their own right, rather than symptoms of another underlying condition. And because neither can be easily identified via blood tests or imaging tools, both are diagnosed on the basis of symptoms, with excruciating pain typically topping the list.