There is a possibility of cervical muscle spasm alongwith nerve compression near cervical spinal cord..
Is there any tingling numbness in hands or weakness in upper limbs while working..
Next Steps
I will sugget you to start got fomentation, avoid heavy work, take analgesic with muscle relaxant tablet, get one x ray of cervical spine done. If something is doubtful, you may require MRI of Cervical spine..
Health Tips
Avoid heavy work, you may use Soft Cervical Collar for support..