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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

In this situation, it is often difficult to know if you actually blacked out or just fell asleep.

If you are unsure, call your doctor for advice.

If you still feel lightheaded when you wake up, your blood pressure may be too low for you.

Click here to continue with the guide.

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.

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