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Updated: Aug 15, 2025

Chronic Post-Ischemia Pain Model for Complex Regional Pain Syndrome Type-I in Rats
Published on: January 21, 2020
Complex regional pain syndrome after mRNA-based COVID-19 vaccination
Shiro Horisawa1, Tamon Ando1, Takakazu Kawamata1
1Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan.
Abstract:
We describe the case of a 17-year-old woman diagnosed with complex regional pain syndrome (CRPS) at a pain clinic after the second dose of the COVID-19 vaccine. She was referred to our department for surgical treatment of movement disorder seven months after the second inoculation. Baclofen (50 µg), administered intrathecally, improved the involuntary movements of her right hand. After administration of zolpidem (5 mg), involuntary movements of the right index finger almost disappeared. However, neither zolpidem nor intrathecal baclofen improved the limited range of motion of the first joint of the left-hand finger. Despite various reports on CRPS development after vaccination, only one case post COVID-19 vaccination has been reported. Therefore, healthcare providers should keep in mind that CRPS can appear after the COVID-19 vaccination.
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