What makes us faint?
Hayley Lewis
Fainting is usually preceded by dizziness
Fainting, or ‘syncope’, is a temporary loss of consciousness due to a lack of oxygen to the brain. It is usually preceded by dizziness, nausea, sweating and blurred vision. The most common cause is overstimulation of the vagus nerve. Possible triggers of this include intense stress and pain, standing up for long periods or exposure to something unpleasant. Severe coughing, exercise and even urinating can sometimes produce a similar response.