Don’t panic—mild overhydration headaches aren’t dangerous. But if you feel confused, have muscle cramps, or can’t stop throwing up, that’s hyponatremia, and it’s serious. In rare cases, it requires a hospital visit to balance your electrolytes.
Otherwise, you’re probably fine. You’re just a well-meaning, slightly over-eager human who tried to do the right thing and got a headache for your trouble. Welcome to the club.
