what does it mean when your tongue swells up?

Not Medical Advice: A swollen tongue can be a symptom of a drug allergy or, in an adult, dehydration. It may also be the result of a thermal burn of the mouth or tongue.

In dehydration, swelling of the tongue would be a more serious complication. Dehydration occurs when the body loses more water than it is taken in, and becomes a problem when the loss is excessive (such as in vomiting or diarrhea). It can also happen due to excessive sweating (such as while exercising on a hot day and not drinking enough water).

Swelling of the tongue due to a drug allergy is a serious symptom. We recommend seeing a doctor as soon as possible, especially if you believe the swelling may be due to a drug allergy.