Symptom Checker
Step 4: Read and complete the decision guide to learn more about your symptoms.
Blacking Out, Fainting, or Loss of Consciousness
Let's explore some of the common reasons for blacking out.
Did you feel lightheaded just before you blacked out?
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.