What term describes a condition where non-painful stimuli result in pain?

Allodynia refers to a condition in which normally non-painful stimuli—such as light touch or mild pressure—are perceived as painful. This phenomenon occurs when the nervous system becomes sensitized, often as a result of injury, inflammation, or certain neurological conditions. In individuals experiencing allodynia, even the most gentle touch can trigger a pain response, deviating from typical sensory processing.

In contrast, hyperalgesia is characterized by an increased sensitivity to painful stimuli, meaning that painful stimuli provoke a more intense pain response. Analgesia, on the other hand, describes a lack of pain in response to stimuli that would typically cause pain. Neuropathic pain refers to pain that results from damage to the nervous system itself, rather than from stimuli that are normally painful. Understanding allodynia is important, particularly in clinical settings, as it can significantly affect patient experience and treatment outcomes.