Faculty: International Relations and Regional Studies

What Causes Phobias?

Some phobias develop when someone has a scary experience with a particular thing or situation. A tiny brain structure called the amygdala (pronounced: uh-MIG-duh-luh) keeps track of experiences that trigger strong emotions. Once a certain thing or situation triggers a strong fear reaction, the amygdala warns the person by triggering a fear reaction every time he or she encounters (or even thinks about) that thing or situation.

Someone might develop a bee phobia after being stung during a particularly scary situation. For that person, looking at a photograph of a bee, seeing a bee from a distance, or even walking near flowers where there could be a bee can all trigger the phobia.

Sometimes, though, there may be no single event that causes a particular phobia. Some people may be more sensitive to fears because of personality traits they are born with, certain genes they've inherited, or situations they've experienced. People who have had strong childhood fears or anxiety may be more likely to have one or more phobias.

Having a phobia isn't a sign of weakness or immaturity. It's a response the brain has learned in an attempt to protect the person. It's as if the brain's alert system triggers a false alarm, generating intense fear that is out of proportion to the situation. Because the fear signal is so intense, the person is convinced the danger is greater than it actually is.