<prompt> Severe pain which arise after injury to or sectioning of a peripheral sensory nerve is called as:Temporal arteritisNeuralgiaNeuritisCausalgia  <response>: Complex Regional Pain Syndrome Causalgia, Reflex Sympathetic Dystrophy SyndromeCausalgia is a term applied to severe pain which arises after injury to or sectioning of a peripheral sensory nerve. Although few reports of this condition exist in the dental literature, cases do occur after the extraction of teeth. It has readily identifiable signs and symptoms and is treatable if recognized early; however, the syndrome may become disabling if unrecognized.Key Concept:Causalgia manifests as severe pain after injury or sectioning of a peripheral sensory nerve following a difficult extraction. The other names are complex regional pain syndrome and reflex sympathetic dystrophy syndrome.Reference: Shafers Textbook of ORAL PATHOLOGY Eighth Edition page no 578 