Dehydration self-check for adults
Noticing thirst, darker urine or other changes? Use this short checklist to review possible signs of dehydration and learn what to do next.
Check the signs you've noticed
What your answers suggest
Reminder: This checklist does not provide a hydration score or a medical severity classification.
When to get medical attention
Seek immediate medical help for confusion, fainting, lack of urination, rapid breathing or a very rapid heartbeat. These can be warning signs of serious illness, including severe dehydration.
Get medical advice promptly for persistent dizziness when standing, very dark or unusually colored urine, markedly reduced urination, or symptoms that do not improve. Red or brown urine can have causes other than dehydration and should not be dismissed as simply needing more water.
Everyday hydration guidance
When thirsty, drinking fluids is usually helpful. Fluid needs vary with activity, weather, illness, medications and health conditions; some people need to follow a prescribed fluid limit. If vomiting or diarrhea causes substantial fluid loss, a pharmacist or clinician can advise whether an oral rehydration solution is appropriate.
Urine color is only one clue. Very pale urine does not rule out problems, while darker urine may also reflect foods, medications or other conditions.