What is hyperpathia?
Hyperpathia refers to a symptom in which nociceptive stimuli result in greater than expected or exaggerated levels of pain. The term hyperpathia also refers to an abnormally intense pain response to repetitive stimuli not sensitive to a simple stimulus, but over-responds to multiple stimuli. For example, a single pinprick may not be felt, but repetitive pinpricks produce intense pain. Hyperpathia is sometimes called summation dysesthesia.