So, what causes a phobia?
There is no single cause to a phobia, but we know that there can be a number of associated factors.
A phobia can be a learned response which developed in the persons early life usually from a parent or sibling (brother/sister).
The phobia could be associated with a particular incident or trauma.
There is a belief that genetics could play a role as there is a suggestion that some people are born with a tendency to be a little bit more anxious than others.