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Symptom Checker

Step 4: Read and complete the decision guide to learn more about your symptoms.

Blacking Out, Fainting, or Loss of Consciousness

That's good. But there could still be a serious reason for loss of consciousness.

Call for immediate medical help. Call 911 if necessary. Do not attempt to drive.

You will need prompt evaluation. There are multiple possibilities:

- Low blood sugar

- Dehydration

- Heart related problem

- A seizure

- Alcohol or drug effect


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Disclaimer: This content should not be considered complete and should not be used in place of a call or visit to a health professional. Use of this content is subject to specific Terms of Use & Medical Disclaimers.