is the evocation of pain by a weakly noxious stimulus

Definition: Increased responsiveness to noxious stimuli is termed as hyperalgesia. It occurs following injury or disease and encompasses enhanced responses as well as reduced thresholds to a given noxious stimulus. 'Primary' hyperalgesia occurs in the damaged area whereas 'secondary' hyperalgesia occurs in the area surrounding it (see table in chapter nociception.

an uncommon condition in which increased opioid dosing paradoxically results in increased pain

The excessive sensibility to low intensity noxious stimuli.

Excessive sensibility to pain.

Increased perception of pain from a noxious stimulus that normally is not this intense.

An abnormal or excessive sensation, or heightened sensitivity, of the nerves. Hypoalgesia is the opposite and both have been grouped to mean altered peripheral neural sensibility

Abnormally increased pain sensation.

Extreme sensitivity to pain.

Increased response to a stimulus that is normally painful.

Excessive sensitivity to painful stimuli.