CausesBy Mayo Clinic staff
Much is still unknown about the actual cause of phobias. There does appear to be a link between your own phobias and the phobias of your parents, however. Children may learn phobias by observing a family member's phobic reaction to an object or a situation — for example, a fear of snakes or spiders.
Brain chemicals, genetics and traumatic experiences also appear to influence the development of phobias.
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