Stiff neck

At work or in daily life, people suddenly flash their heads and necks for some reason, and their muscles are unpreparedly strongly contracted or pulled, causing tissues such as cervical muscle fibers or ligaments to tear; there are also sudden sudden braking in high-speed cars The cervical spine caused rapid back-and-forth swings and caused injuries; there were also a small number of improper sleeping positions (commonly known as ldquo; fall pillows rdquo;).

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