Dehydration happens when your body doesn’t have as much water as it needs. Without enough, your body can’t function properly. You can have mild, moderate, or severe dehydration depending on how much fluid is missing from your body.
It’s normal to lose water from your body every day by sweating, breathing, peeing, and pooping, and through tears and saliva (spit). Usually you replace the lost liquid by drinking fluids and eating foods that contain water. If you lose too much water or don’t drink and eat enough, you can get dehydrated.
You can lose more water than usual with:
- A fever
- Excessive sweating
- Peeing a lot (Diabetes and some medications like water pills — also called diuretics — can make you pee more often.)
You may not replace the water you lose because:
- You’re busy and forget to drink enough.
- You don’t realize you’re thirsty.
- You don’t feel like drinking because you have a sore throat or mouthsores, or you’re sick to your stomach.
Signs of mild or moderate dehydration include:
Signs of severe dehydration include:
- Loss of appetite
- Abnormal mental status
- Possible coma
- Consciousness, decreased
- Muscle weakness
- Muscle spasms or cramps
Severe dehydration is a medical emergency and needs to be treated immediately.