Why Do I Get Salt Stains When I Sweat

You may be a heavy sodium loser if your sweat burns your eyes, tastes salty or leaves a cakey-white residue on your skin. Sweat contains one to two grams of sodium per liter–and since it’s easy to lose a liter of perspiration in a long race, that means you’re losing this much sodium too.

Is it bad if you sweat salt?

Sodium is basically what keeps water in your bloodstream. If you sweat it out, and you don’t replace it and you’re just drinking water, you’re further diluting your blood sodium levels. You can get hyponatremia – low blood sodium.

Why does my sweat leave white residue?

Then your sweat is more dense with salt than most people’s — the white residue is salt. Salty sweaters are common, and they need to be attentive to hydration when they are exercising, said Spriet. “If you are a doctor for a team, you are looking around for the guys who lose a lot of salt,” he said.