A dehydration headache typically causes a dull, throbbing ache that improves after you drink water and rest. If your headache does not improve with hydration, grows suddenly severe, or comes with confusion, vision changes, or numbness, it may point to something that needs medical attention right away. A headache could mean you forgot to drink water, or it could signal something that needs prompt care. Knowing the difference matters. This post walks you through what ...
