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When you faint, you will feel weak and unsteady before passing out for a short period of time, usually only a few seconds. Fainting can happen when you are sitting down, standing up or when you get up too quickly.
Warning symptoms
Just before losing consciousness, you may experience the following symptoms:
yawning
a sudden, clammy sweat
nausea (feeling sick)
fast, deep breathing
confusion
feeling lightheaded
blurred vision or spots in front of your eyes
ringing in your ears
This is followed by a loss of strength and a loss of consciousness. It only takes a few seconds to run through these symptoms, and there may be very little warning before you collapse. In some cases, there may be no other symptoms to warn you that you are about to faint.
When you collapse to the ground, your head and heart are on the same level. This means that your heart does not have to work as hard to push blood up to your brain. You should return to consciousness after about 20 seconds. In rare cases, you may remain unconscious for longer, perhaps several minutes.
Treatment fainting
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