Before you faint due to vasovagal syncope, you may experience some of the following:
- Skin paleness
- Tunnel vision — your field of vision is constricted so that you see only what's in front of you
- Feeling of warmth
- A cold, clammy sweat
- Blurred vision
During a vasovagal syncope episode, bystanders may notice:
- Jerky, abnormal movements
- A slow, weak pulse
- Dilated pupils
Recovery after a vasovagal episode begins soon after fainting, generally in less than a minute. However, if you stand up too soon after fainting — within 15 to 30 minutes or so — you're at risk of fainting again.
When to see a doctor
Because fainting can be a sign of a more serious condition, such as a heart or brain disorder, you may want to consult your doctor after a fainting spell, especially if you never had one before.