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Congenital analgesia: the cost of not feeling pain

8 November 2012 Last updated at 10:57 GMT

Steve Pete from Washington State, America, was born with the rare genetic condition congenital analgesia.

His brother Chris has the same condition and although they have a sense of touch, they cannot feel pain.

While initially the thought of never experiencing pain may seem appealing, he told BBC News that it is actually a disadvantage, saying "pain is a warning system".

As a result of his condition he spent much of his childhood in hospital or with a plaster cast on as he broke bones so often.

He is now talking part in UK research into the genetic basis of his disorder, which is usually due to a mutation in the SCN9A gene.