Neck strains often cause muscle spasms and stiffness after a crash

https://smb.greenvilleadvocate.com/article/Atlantas-Hurt-911-Injury-Centers-Revolutionizes-Car-Accident-Recovery-with-Doctor-Led-Care-and-Legal-Support?storyId=6827816017bc4f0008d9ab83

Neck strains often cause muscle spasms and stiffness after a crash, sometimes worsening over days as inflammation increases and tissues heal.