Clinical significance of sensory hypersensitivities in migraine patients: does allodynia have a priority on it?

Objectives: This study investigated to identify the clinical significance of allodynia compared with other sensory hypersensitivities (SH) in migraine patients. Methods: New patients with migraine were recruited from a headache clinic, and we collected data regarding their clinical characteristics and identified SH including photophobia, phonophobia, osmophobia, and allodynia. The patients completed the 12-item Allodynia Symptom Checklist, Migraine Disability Assessment Scale (MIDAS), Headache Impact Test-6 (HIT-6), Patient Health Questionnaire-9 (PHQ-9), Generalized Anxiety Disorder-7 (GAD-7), Insomnia Severity Index (ISI), Fatigue Severity Scale (FSS), and Migraine-Specific Quality of Life Questionnaire Version 2.1. We divided the patients into three groups: SH with allodynia (group 1), SH without allodynia (group 2), and no SH (group 3). Clinical characteristics, psychosomatic features, and quality of life (QOL) were compared among these groups. Results: A total of 312 migraine patients participated in the study. Among them, 58 (18.6%), 202 (64.7%), and 52 (16.7%) were allocated to groups 1, 2, and 3, respectively. Chronic migraine, family history of migraine, medication overuse headache, earlier age at onset, longer disease duration, higher headache intensity, and aggravation with physical activity were more prevalent in group 1 than in groups 2 or 3. Scores of the MIDAS, HIT-6, PHQ-9, GAD-7, ISI, and FSS were the highest in group 1, followed by groups 2 and group 3. The lowest QOL was noted in group 1, followed by groups 2 and group 3. Conclusions: This study revealed that SH in migraine, particularly combined with allodynia, may result in poor clinical outcomes.