Who is more foolish, the child afraid of the dark or the adult afraid of the light? —Maurice Freehill
Causes
Phobias usually develop in late childhood, adolescence, or early adult life in response to a frightening event or situation. However, it is not always clear where phobias come from.
The cause of simple phobias is not always known. Occasionally a simple phobia can be traced to an earlier experience.
For example, a child being trapped in an enclosed confined space may develop claustrophobia when they are older.
Sometimes, certain phobias, such as a fear of spiders, run in families. This is probably because children learn to fear, rather than inherit the phobia from a family member.
The causes of complex phobias, such as agoraphobia and social phobia, are unclear. Social phobias may begin due to an anxious and intense experience in a social situation. Or it may be that your social confidence did not have the chance to fully develop past the normal stage of shyness of a young child.