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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

It may be that you had a drop in your blood pressure. If blood pressure falls too much too quickly, it can cause you to black out. Usually you would feel lightheaded before you actually lost consciousness.

Let's assume that you don't remember feeling lightheaded this time.

Did you fall and injure yourself when you blacked out?

Yes, I did injure myself.

I have no injury related to blacking out.

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