• J Pain · Nov 2022

    Symptomatic but not Asymptomatic COVID-19 Impairs Conditioned Pain Modulation in Young Adults.

    • Jessica A Peterson, Michael G Bemben, Rebecca D Larson, Hugo Pereira, H Michael Crowson, and Christopher D Black.
    • Pain Research and Intervention Center of Excellence (PRICE) at the University of Florida, Gainesville, Florida; Department of Community Dentistry and Behavioral Science, the University of Florida, Gainesville, Florida; Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma. Electronic address: jpeterson@dental.ufl.edu.
    • J Pain. 2022 Nov 1; 23 (11): 192319321923-1932.

    AbstractPain is a common symptom reported in COVID-19 patients. Impaired endogenous pain-modulatory mechanisms such as conditioned pain modulation (CPM), and exercise-induced hypoalgesia (EIH) have been found in chronic pain conditions but is often overlooked in acute conditions that evoke painful symptoms, such as COVID-19. The purpose was to compare pressure-pain sensitivity, CPM, and EIH function among individuals who previously had COVID-19, both symptomatically and asymptomatically, and a healthy control group. Pressure pain thresholds of 59 participants were assessed in the forearm and leg using a pressure algometer before and after 1) submersion of their dominant foot in cold water (2°C) for 1min; and 2) isometric knee extension performed to task-failure at 25% of their maximal contraction. The CPM response was attenuated in individuals who were infected with symptomatic COVID-19 (N = 26) compared to asymptomatic COVID-19 (N = 13) in arm (-1.0% ± 20.3 vs 33.3% ± 26.2; P < .001) and leg (12.8% ± 22.0 vs 33.8% ± 28.2; P = .014) and compared to controls (N = 20) in arm only (-1.0% ± 26.2 vs 23.4% ± 28.2; P = .004). The EIH response was not different between groups. CPM was impaired in individuals who had symptomatic COVID-19, which may have long-term implications on pain modulation. PERSPECTIVE: This study reveals that CPM was impaired in individuals who had symptomatic COVID-19 during the first wave of COVID-19, pre vaccine. These findings present a preliminary motive to study the long-term implications of COVID-19 and its effects on pain modulation.Published by Elsevier Inc.

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