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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

Although you don't recall feeling lightheaded immediately before passing out, you might have noticed getting lightheaded at other times, especially when standing quickly.

Do either or both of the following apply to you?

- I stood up quickly from a lying or sitting position before I blacked out.

- Although I did not get lightheaded this time, I have felt lightheaded with standing in the past.

Yes, one or both applies to me.

No, neither applies to me.

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