The International Association of the Study of Pain's (IASP) definition of hyperpathia is that: A painful syndrome characterized by an abnormally painful reaction to a stimulus, especially a repetitive stimulus, as well as an increased threshold. The definition also complies with a note which is: It may occur with allodynia, hyperesthesia, hyperalgesia, or dysesthesia.
The IASP defines hyperpathia as a painful condition characterized by an exaggerated response to stimuli, particularly repetitive ones, along with an elevated sensitivity threshold. This definition also notes that it may co-occur with other conditions such as allodynia, hyperesthesia, hyperalgesia, or dysesthesia.