Diagnosing Neuropathic Dysesthesia in Perianal Discomfort

Clinical History and Examination

The American Diabetes Association recommends identifying characteristic neuropathic pain descriptors, such as burning, tingling, or altered sensation, to distinguish neuropathic dysesthesia from nociceptive pain 1
The International Association for the Study of Pain suggests that a symptom-sign mismatch, where symptoms dramatically outweigh observable pathology, is a hallmark finding of neuropathic dysesthesia 3, 2
The European Federation of Neurological Societies recommends assessing temporal pattern, including continuous or intermittent pain, often with nocturnal exacerbation, to aid in diagnosis 1

The American Academy of Neurology recommends quantitative sensory testing (QST) to measure thermal detection thresholds and identify patients with reduced nerve fiber density on biopsy 1
The British Society of Gastroenterology suggests that skin biopsy, which measures intraepidermal nerve fiber density (IENFD), is the gold standard for diagnosing small fiber neuropathy 7
The American College of Physicians recommends nerve conduction studies to assess large fiber function and exclude entrapment syndromes 1

The National Institute of Neurological Disorders and Stroke suggests a step-wise approach to diagnosis, including clinical history, sensory examination, anesthetic challenge, screening questionnaire, exclusion of alternative diagnoses, and confirmatory testing if necessary 1, 3, 2
The European Neurological Society recommends considering comorbid psychological factors, such as anxiety and depression, as consequences of chronic neuropathic pain, rather than causes 3, 2