algophobia

n. abnormal fear of pain

Algophobia is a phobia of pain - an abnormal and persistent fear of pain that is far more powerful than that of a normal person. Algophobia is a self-destructive or cycling phobia. A person suffering from algophobia will feel psychological pain from the phobia, which again triggers the phobia and causes more pain, and so on in a destructive cycle. The fear is excessive, beyond that which is expected under the circumstances, producing an anxiety reaction.
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Algophobia /al·go·pho·bia/ irrational fear of pain. al·go·pho·bi·a n. An abnormal fear of pain. algophobia Psychiatry A morbid fear of pain. [more]Algophobia - Community and Resources

Noun
1. a morbid fear of pain
(hypernym) simple phobia

A fear of pain