<P> Arachnophobia is the irrational fear of spiders and other arachnids such as scorpions . </P> <P> People with arachnophobia tend to feel uneasy in any area they believe could harbor spiders or that has visible signs of their presence, such as webs . If arachnophobics see a spider, they may not enter the general vicinity until they have overcome the panic attack that is often associated with their phobia . Some people scream, cry, have emotional outbursts, experience trouble breathing, sweat, have heart palpitations, or even faint when they come in contact with an area near spiders or their webs . In some extreme cases, even a picture or a realistic drawing of a spider can trigger intense fear . </P> <P> Arachnophobia may be an exaggerated form of an instinctive response that helped early humans to survive, or a cultural phenomenon that is most common in predominantly European societies . </P> <P> An evolutionary reason for the phobia remains unresolved . One view, especially held in evolutionary psychology, is that the presence of venomous spiders led to the evolution of a fear of spiders or made acquisition of a fear of spiders especially easy . Like all traits, there is variability in the intensity of fears of spiders, and those with more intense fears are classified as phobic . Spiders, for instance, being relatively small, do not fit the usual criterion for a threat in the animal kingdom where size is a factor, but they can have medically significant venom . However, This theory fails to take into consideration that a phobia is an irrational fear as opposed to a rational fear, in the context of current mental health usage . </P>

Where does the fear of spiders come from
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