Fainting happens when you
How do you know if you are passing out?
- Dizziness.
- Weakness.
- Sweating.
- Blurred vision, seeing spots.
- Headache.
- Sensation that the room is moving.
- Ringing in the ears (see tinnitus)
- Nausea, vomiting.
What is the most common cause of fainting?
Heart rhythm changes are the most common causes of passing out, fainting, or syncope. Frequently, fainting episodes are caused by a temporary change in normal body function. Heart rhythm changes like tachycardia are more dangerous and potentially life-threatening causes of fainting.