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Most headaches are uncomfortable but benign. A small number is the first sign of something genuinely dangerous – and the window for effective treatment can be hours. Knowing the difference isn’t complicated, but it does require knowing what to look for. This article covers exactly that. Headaches are among the most common reasons people seek…

Medically reviewed by Ramin Ansari, MD — Board-certified neurologist at Lone Star Neurology, Frisco, Texas. Fellowship-trained in Clinical Neurophysiology (Hahnemann University Hospital, Philadelphia). Assistant Professor of Neurology, Burnett School of Medicine at TCU, Fort Worth. Last reviewed: May 2026. Medical disclaimer: This article is for informational purposes only and does not replace professional medical advice,…

The room isn’t moving. You know that, but your brain is convinced otherwise. Vertigo isn’t just feeling lightheaded or unsteady. It’s a false, often overwhelming sense of rotation that can drop you to your knees without warning. Some cases resolve on their own. Others are the first sign of something that genuinely needs medical attention…

Poor sleep feels like a lifestyle problem until it isn’t. What starts as difficulty falling asleep or waking up exhausted can signal a nervous system issue that deserves a neurologist’s attention – not a better bedtime routine. Here’s what the research actually shows about the brain during sleep, and when to take these symptoms seriously….