Different Types of Pain : Anesthesia. Hyperaesthesia, Paraesthesia, Allodynia, etc.

TAXONOMY OF PAIN

Terminology	Description
Anesthesia dolorosa	It is a paradoxic pain in the region of sensory loss following an injury to a cranial nerve or a nerve root. It is seen most often after surgical treatment of the trigeminal ganglion or root for neuralgia.
Allodynia	Pain due to non painful stimulus that does not normally produce pain.
Hyperalgesia	Increased response to a stimulus that is usually painful
Hyperaesthesia	Increased sensitivity to stimulation and does not imply a painful sensation. Hyperalgesia is a special case of hyperaesthesia.
Hypoaesthesia	Decreased sensitivity to stimulation
Hypoalgesia	A special case of hypoaesthesia in which pain response to normally painful stimuli is diminished.
Paraesthesia	Abnormal (but not unpleasant) sensation
Dysesthesia	Unpleasant abnormal sensation
Hyperpathia	It is painful syndrome with increased reaction to a stimulus and an increased threshold; faulty identification and localization of stimulus; delayed and radiating sensations and after sensation may be present.
Causalgia	It is a syndrome of: Burning Pain, Allodynia, and Hyperpathia after a traumatic nerve lesion.
Phantom pain	Described as perceptions that an individual experiences relating to a limb or an organ that is not physically part of the body. For example, Limb loss as a result of either amputation following surgery or congenital absence of limb. Phantom limb pain is the feeling of pain in an absent limb or a portion of a limb.