A 23-year-old woman presents to the emergency department (ED) with a sudden onset of a thunderclap headache that she describes as the “worst headache of her life.” ...

Such intense, sudden-onset headaches (sometimes described as “thunderclap headaches”) may indicate serious conditions like subarachnoid hemorrhage, arterial dissection, or other vascular ...

Some people with high or low blood sugar levels may feel tired, thirsty, or dizzy. And surprisingly, many also experience more frequent headaches or migraines. But until recently, no one really knew ...