Phantom limb pain is a condition where a person experiences painful sensations in a limb or organ they no longer have, upwards of 60% of amputees may suffer with phantom pain. It is just one example of chronic pain, a condition which continues to baffle doctors and cause immense distress amongst those who suffer from it.
Watch a video of Peter, who suffers from phantom limb pain, and the scientists who work with him to help tackle his chronic pain.
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