What Makes You Faint?
You're Dehydrated
Arrhythmia
Cyanotic Breath-Holding
Pallid Breath-Holding
Low Blood Sugar
Diabetes
Medicine
Seizure
Standing Up
Heart Problems
Reflex Fainting
Hyperventilation
Coughing
Drinking Alcohol
Your Collar's Too Tight
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SOURCES:
American Diabetes Association: "Hypoglycemia (Low Blood Glucose)."
American Heart Association: "Syncope (Fainting)."
AsthmaSymptoms.org: "Fainting -- A Serious Symptom of Asthma."
Boston College Alcohol and Drug Education Program: "Blacking Out Vs. Passing Out."
Child Neurology Foundation: "Breath-Holding Spells."
Emergency Medicine Journal: "Syncope And Breath Holding."
Encyclopaedia Britannica: "Syncope."
Familydoctor.org: "Fainting."
Harvard Health Publishing: "Hypoglycemia."
Heart Rhythm Society: "Fainting."
Mayo Clinic: "Vasovagal syncope," "Dehydration."
Medscape: "Carotid Sinus Hypersensitivity."
Merck Manual: "Shortness of Breath," "Fainting."
NHS Choices: "Postural tachycardia syndrome (PoTS)," "Breath-holding spells in children," "Fainting."