Those who have simple fainting usually need no further monitoring or treatment. Those who have heart disease may need ongoing treatment for many years. Most people are able to return to normal activities after treatment.
In most people, simple fainting is not a sign of a life-threatening disease, particularly if it only happens once. The elderly have a higher risk of injury after a fainting episode, especially from fractures.
Following Up ...
Simple fainting (vasovagal syncope) has an excellent outcome, and recurrences are rare.
Driving is not a problem for a simple faint but greater restrictions apply if the situation is more complicated or if diagnosis is less clear.
If in doubt, contact the Driver and Vehicle Licensing Agency (DVLA).
Vasovagal spells (most common cause)-simple fainting that can occur:
During medical procedures
During times of high stress, trauma, or fright
After standing still for a long period of time ...
A decrease in consciousness almost always require a doctor's attention, except perhaps when due to alcohol intoxication, ~ing, or a previously recognized seizure disorder.
See the article on seizures for tips on how to care for a person who is having a seizure.
See also: What is the meaning of Consciousness, Fainting, Low blood sugar, Blood pressure, Hypotension?